diff --git a/pctencoded.go b/pctencoded.go
index 3623780..ee1703f 100644
--- a/pctencoded.go
+++ b/pctencoded.go
@@ -4,10 +4,47 @@ import (
 	"io"
 
 	"github.com/reiver/go-erorr"
+	"github.com/reiver/go-rfc2234"
 )
 
 const pctencodedprefix = '%'
 
+// IsPctEncodedPrefix returns true if what is at the beginning of the string is 'pct-encoded' as defined by IETF RFC-3986.
+//
+//	pct-encoded = "%" HEXDIG HEXDIG
+//
+// Where 'HEXDIG' is defined in IETF RFC-2234 as:
+//
+//	HEXDIG = DIGIT / "A" / "B" / "C" / "D" / "E" / "F"
+//	
+//	DIGIT  = %x30-39
+//	       ; 0-9
+func HasPrefixPctEncoded(str string) bool {
+	var length int = len(str)
+
+	if length < 3 {
+		return false
+	}
+
+	var str0 rune = rune(str[0])
+	var str1 rune = rune(str[1])
+	var str2 rune = rune(str[2])
+
+	if !IsPctEncodedPrefix(str0) {
+		return false
+	}
+
+	if !rfc2234.IsHexDig(str1) {
+		return false
+	}
+
+	if !rfc2234.IsHexDig(str2) {
+		return false
+	}
+
+	return true
+}
+
 func IsPctEncodedPrefix(r rune) bool {
 	return pctencodedprefix == r
 }
diff --git a/pctencoded_hasprefixpctencoded_test.go b/pctencoded_hasprefixpctencoded_test.go
new file mode 100644
index 0000000..ac8f1bf
--- /dev/null
+++ b/pctencoded_hasprefixpctencoded_test.go
@@ -0,0 +1,2407 @@
+package rfc3986_test
+
+import (
+	"testing"
+
+	"math/rand"
+	"time"
+
+	"github.com/reiver/go-rfc3986"
+)
+
+func TestHasPrefixPctEncoded(t *testing.T) {
+	tests := []struct{
+		String string
+		Expected bool
+	}{
+		{
+			String: "",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "ONCE",
+			Expected: false,
+		},
+		{
+			String: "TWICE",
+			Expected: false,
+		},
+		{
+			String: "THRICE",
+			Expected: false,
+		},
+		{
+			String: "FOURCE",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "0x00",
+			Expected: false,
+		},
+		{
+			String: "0xff",
+			Expected: false,
+		},
+		{
+			String: "0xFF",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%GG",
+			Expected: false,
+		},
+		{
+			String: "%Gg",
+			Expected: false,
+		},
+		{
+			String: "%gG",
+			Expected: false,
+		},
+		{
+			String: "%gg",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%0",
+			Expected: false,
+		},
+		{
+			String: "%1",
+			Expected: false,
+		},
+		{
+			String: "%2",
+			Expected: false,
+		},
+		{
+			String: "%3",
+			Expected: false,
+		},
+		{
+			String: "%4",
+			Expected: false,
+		},
+		{
+			String: "%5",
+			Expected: false,
+		},
+		{
+			String: "%6",
+			Expected: false,
+		},
+		{
+			String: "%7",
+			Expected: false,
+		},
+		{
+			String: "%8",
+			Expected: false,
+		},
+		{
+			String: "%9",
+			Expected: false,
+		},
+		{
+			String: "%A",
+			Expected: false,
+		},
+		{
+			String: "%a",
+			Expected: false,
+		},
+		{
+			String: "%B",
+			Expected: false,
+		},
+		{
+			String: "%b",
+			Expected: false,
+		},
+		{
+			String: "%C",
+			Expected: false,
+		},
+		{
+			String: "%c",
+			Expected: false,
+		},
+		{
+			String: "%D",
+			Expected: false,
+		},
+		{
+			String: "%d",
+			Expected: false,
+		},
+		{
+			String: "%E",
+			Expected: false,
+		},
+		{
+			String: "%e",
+			Expected: false,
+		},
+		{
+			String: "%F",
+			Expected: false,
+		},
+		{
+			String: "%f",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%0G",
+			Expected: false,
+		},
+		{
+			String: "%1G",
+			Expected: false,
+		},
+		{
+			String: "%2G",
+			Expected: false,
+		},
+		{
+			String: "%3G",
+			Expected: false,
+		},
+		{
+			String: "%4G",
+			Expected: false,
+		},
+		{
+			String: "%5G",
+			Expected: false,
+		},
+		{
+			String: "%6G",
+			Expected: false,
+		},
+		{
+			String: "%7G",
+			Expected: false,
+		},
+		{
+			String: "%8G",
+			Expected: false,
+		},
+		{
+			String: "%9G",
+			Expected: false,
+		},
+		{
+			String: "%AG",
+			Expected: false,
+		},
+		{
+			String: "%aG",
+			Expected: false,
+		},
+		{
+			String: "%BG",
+			Expected: false,
+		},
+		{
+			String: "%bG",
+			Expected: false,
+		},
+		{
+			String: "%CG",
+			Expected: false,
+		},
+		{
+			String: "%cG",
+			Expected: false,
+		},
+		{
+			String: "%DG",
+			Expected: false,
+		},
+		{
+			String: "%dG",
+			Expected: false,
+		},
+		{
+			String: "%EG",
+			Expected: false,
+		},
+		{
+			String: "%eG",
+			Expected: false,
+		},
+		{
+			String: "%FG",
+			Expected: false,
+		},
+		{
+			String: "%fG",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%0g",
+			Expected: false,
+		},
+		{
+			String: "%1g",
+			Expected: false,
+		},
+		{
+			String: "%2g",
+			Expected: false,
+		},
+		{
+			String: "%3g",
+			Expected: false,
+		},
+		{
+			String: "%4g",
+			Expected: false,
+		},
+		{
+			String: "%5g",
+			Expected: false,
+		},
+		{
+			String: "%6g",
+			Expected: false,
+		},
+		{
+			String: "%7g",
+			Expected: false,
+		},
+		{
+			String: "%8g",
+			Expected: false,
+		},
+		{
+			String: "%9g",
+			Expected: false,
+		},
+		{
+			String: "%Ag",
+			Expected: false,
+		},
+		{
+			String: "%ag",
+			Expected: false,
+		},
+		{
+			String: "%Bg",
+			Expected: false,
+		},
+		{
+			String: "%bg",
+			Expected: false,
+		},
+		{
+			String: "%Cg",
+			Expected: false,
+		},
+		{
+			String: "%cg",
+			Expected: false,
+		},
+		{
+			String: "%Dg",
+			Expected: false,
+		},
+		{
+			String: "%dg",
+			Expected: false,
+		},
+		{
+			String: "%Eg",
+			Expected: false,
+		},
+		{
+			String: "%eg",
+			Expected: false,
+		},
+		{
+			String: "%Fg",
+			Expected: false,
+		},
+		{
+			String: "%fg",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%00",
+			Expected: true,
+		},
+		{
+			String: "%01",
+			Expected: true,
+		},
+		{
+			String: "%02",
+			Expected: true,
+		},
+		{
+			String: "%03",
+			Expected: true,
+		},
+		{
+			String: "%04",
+			Expected: true,
+		},
+		{
+			String: "%05",
+			Expected: true,
+		},
+		{
+			String: "%06",
+			Expected: true,
+		},
+		{
+			String: "%07",
+			Expected: true,
+		},
+		{
+			String: "%08",
+			Expected: true,
+		},
+		{
+			String: "%09",
+			Expected: true,
+		},
+		{
+			String: "%0A",
+			Expected: true,
+		},
+		{
+			String: "%0a",
+			Expected: false,
+		},
+		{
+			String: "%0B",
+			Expected: true,
+		},
+		{
+			String: "%0b",
+			Expected: false,
+		},
+		{
+			String: "%0C",
+			Expected: true,
+		},
+		{
+			String: "%0c",
+			Expected: false,
+		},
+		{
+			String: "%0D",
+			Expected: true,
+		},
+		{
+			String: "%0d",
+			Expected: false,
+		},
+		{
+			String: "%0E",
+			Expected: true,
+		},
+		{
+			String: "%0e",
+			Expected: false,
+		},
+		{
+			String: "%0F",
+			Expected: true,
+		},
+		{
+			String: "%0f",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%10",
+			Expected: true,
+		},
+		{
+			String: "%11",
+			Expected: true,
+		},
+		{
+			String: "%12",
+			Expected: true,
+		},
+		{
+			String: "%13",
+			Expected: true,
+		},
+		{
+			String: "%14",
+			Expected: true,
+		},
+		{
+			String: "%15",
+			Expected: true,
+		},
+		{
+			String: "%16",
+			Expected: true,
+		},
+		{
+			String: "%17",
+			Expected: true,
+		},
+		{
+			String: "%18",
+			Expected: true,
+		},
+		{
+			String: "%19",
+			Expected: true,
+		},
+		{
+			String: "%1A",
+			Expected: true,
+		},
+		{
+			String: "%1a",
+			Expected: false,
+		},
+		{
+			String: "%1B",
+			Expected: true,
+		},
+		{
+			String: "%1b",
+			Expected: false,
+		},
+		{
+			String: "%1C",
+			Expected: true,
+		},
+		{
+			String: "%1c",
+			Expected: false,
+		},
+		{
+			String: "%1D",
+			Expected: true,
+		},
+		{
+			String: "%1d",
+			Expected: false,
+		},
+		{
+			String: "%1E",
+			Expected: true,
+		},
+		{
+			String: "%1e",
+			Expected: false,
+		},
+		{
+			String: "%1F",
+			Expected: true,
+		},
+		{
+			String: "%1f",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%20",
+			Expected: true,
+		},
+		{
+			String: "%21",
+			Expected: true,
+		},
+		{
+			String: "%22",
+			Expected: true,
+		},
+		{
+			String: "%23",
+			Expected: true,
+		},
+		{
+			String: "%24",
+			Expected: true,
+		},
+		{
+			String: "%25",
+			Expected: true,
+		},
+		{
+			String: "%26",
+			Expected: true,
+		},
+		{
+			String: "%27",
+			Expected: true,
+		},
+		{
+			String: "%28",
+			Expected: true,
+		},
+		{
+			String: "%29",
+			Expected: true,
+		},
+		{
+			String: "%2A",
+			Expected: true,
+		},
+		{
+			String: "%2a",
+			Expected: false,
+		},
+		{
+			String: "%2B",
+			Expected: true,
+		},
+		{
+			String: "%2b",
+			Expected: false,
+		},
+		{
+			String: "%2C",
+			Expected: true,
+		},
+		{
+			String: "%2c",
+			Expected: false,
+		},
+		{
+			String: "%2D",
+			Expected: true,
+		},
+		{
+			String: "%2d",
+			Expected: false,
+		},
+		{
+			String: "%2E",
+			Expected: true,
+		},
+		{
+			String: "%2e",
+			Expected: false,
+		},
+		{
+			String: "%2F",
+			Expected: true,
+		},
+		{
+			String: "%2f",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%30",
+			Expected: true,
+		},
+		{
+			String: "%31",
+			Expected: true,
+		},
+		{
+			String: "%32",
+			Expected: true,
+		},
+		{
+			String: "%33",
+			Expected: true,
+		},
+		{
+			String: "%34",
+			Expected: true,
+		},
+		{
+			String: "%35",
+			Expected: true,
+		},
+		{
+			String: "%36",
+			Expected: true,
+		},
+		{
+			String: "%37",
+			Expected: true,
+		},
+		{
+			String: "%38",
+			Expected: true,
+		},
+		{
+			String: "%39",
+			Expected: true,
+		},
+		{
+			String: "%3A",
+			Expected: true,
+		},
+		{
+			String: "%3a",
+			Expected: false,
+		},
+		{
+			String: "%3B",
+			Expected: true,
+		},
+		{
+			String: "%3b",
+			Expected: false,
+		},
+		{
+			String: "%3C",
+			Expected: true,
+		},
+		{
+			String: "%3c",
+			Expected: false,
+		},
+		{
+			String: "%3D",
+			Expected: true,
+		},
+		{
+			String: "%3d",
+			Expected: false,
+		},
+		{
+			String: "%3E",
+			Expected: true,
+		},
+		{
+			String: "%3e",
+			Expected: false,
+		},
+		{
+			String: "%3F",
+			Expected: true,
+		},
+		{
+			String: "%3f",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%40",
+			Expected: true,
+		},
+		{
+			String: "%41",
+			Expected: true,
+		},
+		{
+			String: "%42",
+			Expected: true,
+		},
+		{
+			String: "%43",
+			Expected: true,
+		},
+		{
+			String: "%44",
+			Expected: true,
+		},
+		{
+			String: "%45",
+			Expected: true,
+		},
+		{
+			String: "%46",
+			Expected: true,
+		},
+		{
+			String: "%47",
+			Expected: true,
+		},
+		{
+			String: "%48",
+			Expected: true,
+		},
+		{
+			String: "%49",
+			Expected: true,
+		},
+		{
+			String: "%4A",
+			Expected: true,
+		},
+		{
+			String: "%4a",
+			Expected: false,
+		},
+		{
+			String: "%4B",
+			Expected: true,
+		},
+		{
+			String: "%4b",
+			Expected: false,
+		},
+		{
+			String: "%4C",
+			Expected: true,
+		},
+		{
+			String: "%4c",
+			Expected: false,
+		},
+		{
+			String: "%4D",
+			Expected: true,
+		},
+		{
+			String: "%4d",
+			Expected: false,
+		},
+		{
+			String: "%4E",
+			Expected: true,
+		},
+		{
+			String: "%4e",
+			Expected: false,
+		},
+		{
+			String: "%4F",
+			Expected: true,
+		},
+		{
+			String: "%4f",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%50",
+			Expected: true,
+		},
+		{
+			String: "%51",
+			Expected: true,
+		},
+		{
+			String: "%52",
+			Expected: true,
+		},
+		{
+			String: "%53",
+			Expected: true,
+		},
+		{
+			String: "%54",
+			Expected: true,
+		},
+		{
+			String: "%55",
+			Expected: true,
+		},
+		{
+			String: "%56",
+			Expected: true,
+		},
+		{
+			String: "%57",
+			Expected: true,
+		},
+		{
+			String: "%58",
+			Expected: true,
+		},
+		{
+			String: "%59",
+			Expected: true,
+		},
+		{
+			String: "%5A",
+			Expected: true,
+		},
+		{
+			String: "%5a",
+			Expected: false,
+		},
+		{
+			String: "%5B",
+			Expected: true,
+		},
+		{
+			String: "%5b",
+			Expected: false,
+		},
+		{
+			String: "%5C",
+			Expected: true,
+		},
+		{
+			String: "%5c",
+			Expected: false,
+		},
+		{
+			String: "%5D",
+			Expected: true,
+		},
+		{
+			String: "%5d",
+			Expected: false,
+		},
+		{
+			String: "%5E",
+			Expected: true,
+		},
+		{
+			String: "%5e",
+			Expected: false,
+		},
+		{
+			String: "%5F",
+			Expected: true,
+		},
+		{
+			String: "%5f",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%60",
+			Expected: true,
+		},
+		{
+			String: "%61",
+			Expected: true,
+		},
+		{
+			String: "%62",
+			Expected: true,
+		},
+		{
+			String: "%63",
+			Expected: true,
+		},
+		{
+			String: "%64",
+			Expected: true,
+		},
+		{
+			String: "%65",
+			Expected: true,
+		},
+		{
+			String: "%66",
+			Expected: true,
+		},
+		{
+			String: "%67",
+			Expected: true,
+		},
+		{
+			String: "%68",
+			Expected: true,
+		},
+		{
+			String: "%69",
+			Expected: true,
+		},
+		{
+			String: "%6A",
+			Expected: true,
+		},
+		{
+			String: "%6a",
+			Expected: false,
+		},
+		{
+			String: "%6B",
+			Expected: true,
+		},
+		{
+			String: "%6b",
+			Expected: false,
+		},
+		{
+			String: "%6C",
+			Expected: true,
+		},
+		{
+			String: "%6c",
+			Expected: false,
+		},
+		{
+			String: "%6D",
+			Expected: true,
+		},
+		{
+			String: "%6d",
+			Expected: false,
+		},
+		{
+			String: "%6E",
+			Expected: true,
+		},
+		{
+			String: "%6e",
+			Expected: false,
+		},
+		{
+			String: "%6F",
+			Expected: true,
+		},
+		{
+			String: "%6f",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%70",
+			Expected: true,
+		},
+		{
+			String: "%71",
+			Expected: true,
+		},
+		{
+			String: "%72",
+			Expected: true,
+		},
+		{
+			String: "%73",
+			Expected: true,
+		},
+		{
+			String: "%74",
+			Expected: true,
+		},
+		{
+			String: "%75",
+			Expected: true,
+		},
+		{
+			String: "%76",
+			Expected: true,
+		},
+		{
+			String: "%77",
+			Expected: true,
+		},
+		{
+			String: "%78",
+			Expected: true,
+		},
+		{
+			String: "%79",
+			Expected: true,
+		},
+		{
+			String: "%7A",
+			Expected: true,
+		},
+		{
+			String: "%7a",
+			Expected: false,
+		},
+		{
+			String: "%7B",
+			Expected: true,
+		},
+		{
+			String: "%7b",
+			Expected: false,
+		},
+		{
+			String: "%7C",
+			Expected: true,
+		},
+		{
+			String: "%7c",
+			Expected: false,
+		},
+		{
+			String: "%7D",
+			Expected: true,
+		},
+		{
+			String: "%7d",
+			Expected: false,
+		},
+		{
+			String: "%7E",
+			Expected: true,
+		},
+		{
+			String: "%7e",
+			Expected: false,
+		},
+		{
+			String: "%7F",
+			Expected: true,
+		},
+		{
+			String: "%7f",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%80",
+			Expected: true,
+		},
+		{
+			String: "%81",
+			Expected: true,
+		},
+		{
+			String: "%82",
+			Expected: true,
+		},
+		{
+			String: "%83",
+			Expected: true,
+		},
+		{
+			String: "%84",
+			Expected: true,
+		},
+		{
+			String: "%85",
+			Expected: true,
+		},
+		{
+			String: "%86",
+			Expected: true,
+		},
+		{
+			String: "%87",
+			Expected: true,
+		},
+		{
+			String: "%88",
+			Expected: true,
+		},
+		{
+			String: "%89",
+			Expected: true,
+		},
+		{
+			String: "%8A",
+			Expected: true,
+		},
+		{
+			String: "%8a",
+			Expected: false,
+		},
+		{
+			String: "%8B",
+			Expected: true,
+		},
+		{
+			String: "%8b",
+			Expected: false,
+		},
+		{
+			String: "%8C",
+			Expected: true,
+		},
+		{
+			String: "%8c",
+			Expected: false,
+		},
+		{
+			String: "%8D",
+			Expected: true,
+		},
+		{
+			String: "%8d",
+			Expected: false,
+		},
+		{
+			String: "%8E",
+			Expected: true,
+		},
+		{
+			String: "%8e",
+			Expected: false,
+		},
+		{
+			String: "%8F",
+			Expected: true,
+		},
+		{
+			String: "%8f",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%90",
+			Expected: true,
+		},
+		{
+			String: "%91",
+			Expected: true,
+		},
+		{
+			String: "%92",
+			Expected: true,
+		},
+		{
+			String: "%93",
+			Expected: true,
+		},
+		{
+			String: "%94",
+			Expected: true,
+		},
+		{
+			String: "%95",
+			Expected: true,
+		},
+		{
+			String: "%96",
+			Expected: true,
+		},
+		{
+			String: "%97",
+			Expected: true,
+		},
+		{
+			String: "%98",
+			Expected: true,
+		},
+		{
+			String: "%99",
+			Expected: true,
+		},
+		{
+			String: "%9A",
+			Expected: true,
+		},
+		{
+			String: "%9a",
+			Expected: false,
+		},
+		{
+			String: "%9B",
+			Expected: true,
+		},
+		{
+			String: "%9b",
+			Expected: false,
+		},
+		{
+			String: "%9C",
+			Expected: true,
+		},
+		{
+			String: "%9c",
+			Expected: false,
+		},
+		{
+			String: "%9D",
+			Expected: true,
+		},
+		{
+			String: "%9d",
+			Expected: false,
+		},
+		{
+			String: "%9E",
+			Expected: true,
+		},
+		{
+			String: "%9e",
+			Expected: false,
+		},
+		{
+			String: "%9F",
+			Expected: true,
+		},
+		{
+			String: "%9f",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%A0",
+			Expected: true,
+		},
+		{
+			String: "%A1",
+			Expected: true,
+		},
+		{
+			String: "%A2",
+			Expected: true,
+		},
+		{
+			String: "%A3",
+			Expected: true,
+		},
+		{
+			String: "%A4",
+			Expected: true,
+		},
+		{
+			String: "%A5",
+			Expected: true,
+		},
+		{
+			String: "%A6",
+			Expected: true,
+		},
+		{
+			String: "%A7",
+			Expected: true,
+		},
+		{
+			String: "%A8",
+			Expected: true,
+		},
+		{
+			String: "%A9",
+			Expected: true,
+		},
+		{
+			String: "%AA",
+			Expected: true,
+		},
+		{
+			String: "%Aa",
+			Expected: false,
+		},
+		{
+			String: "%AB",
+			Expected: true,
+		},
+		{
+			String: "%Ab",
+			Expected: false,
+		},
+		{
+			String: "%AC",
+			Expected: true,
+		},
+		{
+			String: "%Ac",
+			Expected: false,
+		},
+		{
+			String: "%AD",
+			Expected: true,
+		},
+		{
+			String: "%Ad",
+			Expected: false,
+		},
+		{
+			String: "%AE",
+			Expected: true,
+		},
+		{
+			String: "%Ae",
+			Expected: false,
+		},
+		{
+			String: "%AF",
+			Expected: true,
+		},
+		{
+			String: "%Af",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%a0",
+			Expected: false,
+		},
+		{
+			String: "%a1",
+			Expected: false,
+		},
+		{
+			String: "%a2",
+			Expected: false,
+		},
+		{
+			String: "%a3",
+			Expected: false,
+		},
+		{
+			String: "%a4",
+			Expected: false,
+		},
+		{
+			String: "%a5",
+			Expected: false,
+		},
+		{
+			String: "%a6",
+			Expected: false,
+		},
+		{
+			String: "%a7",
+			Expected: false,
+		},
+		{
+			String: "%a8",
+			Expected: false,
+		},
+		{
+			String: "%a9",
+			Expected: false,
+		},
+		{
+			String: "%aA",
+			Expected: false,
+		},
+		{
+			String: "%aa",
+			Expected: false,
+		},
+		{
+			String: "%aB",
+			Expected: false,
+		},
+		{
+			String: "%ab",
+			Expected: false,
+		},
+		{
+			String: "%aC",
+			Expected: false,
+		},
+		{
+			String: "%ac",
+			Expected: false,
+		},
+		{
+			String: "%aD",
+			Expected: false,
+		},
+		{
+			String: "%ad",
+			Expected: false,
+		},
+		{
+			String: "%aE",
+			Expected: false,
+		},
+		{
+			String: "%ae",
+			Expected: false,
+		},
+		{
+			String: "%aF",
+			Expected: false,
+		},
+		{
+			String: "%af",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%B0",
+			Expected: true,
+		},
+		{
+			String: "%B1",
+			Expected: true,
+		},
+		{
+			String: "%B2",
+			Expected: true,
+		},
+		{
+			String: "%B3",
+			Expected: true,
+		},
+		{
+			String: "%B4",
+			Expected: true,
+		},
+		{
+			String: "%B5",
+			Expected: true,
+		},
+		{
+			String: "%B6",
+			Expected: true,
+		},
+		{
+			String: "%B7",
+			Expected: true,
+		},
+		{
+			String: "%B8",
+			Expected: true,
+		},
+		{
+			String: "%B9",
+			Expected: true,
+		},
+		{
+			String: "%BA",
+			Expected: true,
+		},
+		{
+			String: "%Ba",
+			Expected: false,
+		},
+		{
+			String: "%BB",
+			Expected: true,
+		},
+		{
+			String: "%Bb",
+			Expected: false,
+		},
+		{
+			String: "%BC",
+			Expected: true,
+		},
+		{
+			String: "%Bc",
+			Expected: false,
+		},
+		{
+			String: "%BD",
+			Expected: true,
+		},
+		{
+			String: "%Bd",
+			Expected: false,
+		},
+		{
+			String: "%BE",
+			Expected: true,
+		},
+		{
+			String: "%Be",
+			Expected: false,
+		},
+		{
+			String: "%BF",
+			Expected: true,
+		},
+		{
+			String: "%Bf",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%b0",
+			Expected: false,
+		},
+		{
+			String: "%b1",
+			Expected: false,
+		},
+		{
+			String: "%b2",
+			Expected: false,
+		},
+		{
+			String: "%b3",
+			Expected: false,
+		},
+		{
+			String: "%b4",
+			Expected: false,
+		},
+		{
+			String: "%b5",
+			Expected: false,
+		},
+		{
+			String: "%b6",
+			Expected: false,
+		},
+		{
+			String: "%b7",
+			Expected: false,
+		},
+		{
+			String: "%b8",
+			Expected: false,
+		},
+		{
+			String: "%b9",
+			Expected: false,
+		},
+		{
+			String: "%bA",
+			Expected: false,
+		},
+		{
+			String: "%ba",
+			Expected: false,
+		},
+		{
+			String: "%bB",
+			Expected: false,
+		},
+		{
+			String: "%bb",
+			Expected: false,
+		},
+		{
+			String: "%bC",
+			Expected: false,
+		},
+		{
+			String: "%bc",
+			Expected: false,
+		},
+		{
+			String: "%bD",
+			Expected: false,
+		},
+		{
+			String: "%bd",
+			Expected: false,
+		},
+		{
+			String: "%bE",
+			Expected: false,
+		},
+		{
+			String: "%be",
+			Expected: false,
+		},
+		{
+			String: "%bF",
+			Expected: false,
+		},
+		{
+			String: "%bf",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%C0",
+			Expected: true,
+		},
+		{
+			String: "%C1",
+			Expected: true,
+		},
+		{
+			String: "%C2",
+			Expected: true,
+		},
+		{
+			String: "%C3",
+			Expected: true,
+		},
+		{
+			String: "%C4",
+			Expected: true,
+		},
+		{
+			String: "%C5",
+			Expected: true,
+		},
+		{
+			String: "%C6",
+			Expected: true,
+		},
+		{
+			String: "%C7",
+			Expected: true,
+		},
+		{
+			String: "%C8",
+			Expected: true,
+		},
+		{
+			String: "%C9",
+			Expected: true,
+		},
+		{
+			String: "%CA",
+			Expected: true,
+		},
+		{
+			String: "%Ca",
+			Expected: false,
+		},
+		{
+			String: "%CB",
+			Expected: true,
+		},
+		{
+			String: "%Cb",
+			Expected: false,
+		},
+		{
+			String: "%CC",
+			Expected: true,
+		},
+		{
+			String: "%Cc",
+			Expected: false,
+		},
+		{
+			String: "%CD",
+			Expected: true,
+		},
+		{
+			String: "%Cd",
+			Expected: false,
+		},
+		{
+			String: "%CE",
+			Expected: true,
+		},
+		{
+			String: "%Ce",
+			Expected: false,
+		},
+		{
+			String: "%CF",
+			Expected: true,
+		},
+		{
+			String: "%Cf",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%c0",
+			Expected: false,
+		},
+		{
+			String: "%c1",
+			Expected: false,
+		},
+		{
+			String: "%c2",
+			Expected: false,
+		},
+		{
+			String: "%c3",
+			Expected: false,
+		},
+		{
+			String: "%c4",
+			Expected: false,
+		},
+		{
+			String: "%c5",
+			Expected: false,
+		},
+		{
+			String: "%c6",
+			Expected: false,
+		},
+		{
+			String: "%c7",
+			Expected: false,
+		},
+		{
+			String: "%c8",
+			Expected: false,
+		},
+		{
+			String: "%c9",
+			Expected: false,
+		},
+		{
+			String: "%cA",
+			Expected: false,
+		},
+		{
+			String: "%ca",
+			Expected: false,
+		},
+		{
+			String: "%cB",
+			Expected: false,
+		},
+		{
+			String: "%cb",
+			Expected: false,
+		},
+		{
+			String: "%cC",
+			Expected: false,
+		},
+		{
+			String: "%cc",
+			Expected: false,
+		},
+		{
+			String: "%cD",
+			Expected: false,
+		},
+		{
+			String: "%cd",
+			Expected: false,
+		},
+		{
+			String: "%cE",
+			Expected: false,
+		},
+		{
+			String: "%ce",
+			Expected: false,
+		},
+		{
+			String: "%cF",
+			Expected: false,
+		},
+		{
+			String: "%cf",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%D0",
+			Expected: true,
+		},
+		{
+			String: "%D1",
+			Expected: true,
+		},
+		{
+			String: "%D2",
+			Expected: true,
+		},
+		{
+			String: "%D3",
+			Expected: true,
+		},
+		{
+			String: "%D4",
+			Expected: true,
+		},
+		{
+			String: "%D5",
+			Expected: true,
+		},
+		{
+			String: "%D6",
+			Expected: true,
+		},
+		{
+			String: "%D7",
+			Expected: true,
+		},
+		{
+			String: "%D8",
+			Expected: true,
+		},
+		{
+			String: "%D9",
+			Expected: true,
+		},
+		{
+			String: "%DA",
+			Expected: true,
+		},
+		{
+			String: "%Da",
+			Expected: false,
+		},
+		{
+			String: "%DB",
+			Expected: true,
+		},
+		{
+			String: "%Db",
+			Expected: false,
+		},
+		{
+			String: "%DC",
+			Expected: true,
+		},
+		{
+			String: "%Dc",
+			Expected: false,
+		},
+		{
+			String: "%DD",
+			Expected: true,
+		},
+		{
+			String: "%Dd",
+			Expected: false,
+		},
+		{
+			String: "%DE",
+			Expected: true,
+		},
+		{
+			String: "%De",
+			Expected: false,
+		},
+		{
+			String: "%DF",
+			Expected: true,
+		},
+		{
+			String: "%Df",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%d0",
+			Expected: false,
+		},
+		{
+			String: "%d1",
+			Expected: false,
+		},
+		{
+			String: "%d2",
+			Expected: false,
+		},
+		{
+			String: "%d3",
+			Expected: false,
+		},
+		{
+			String: "%d4",
+			Expected: false,
+		},
+		{
+			String: "%d5",
+			Expected: false,
+		},
+		{
+			String: "%d6",
+			Expected: false,
+		},
+		{
+			String: "%d7",
+			Expected: false,
+		},
+		{
+			String: "%d8",
+			Expected: false,
+		},
+		{
+			String: "%d9",
+			Expected: false,
+		},
+		{
+			String: "%dA",
+			Expected: false,
+		},
+		{
+			String: "%da",
+			Expected: false,
+		},
+		{
+			String: "%dB",
+			Expected: false,
+		},
+		{
+			String: "%db",
+			Expected: false,
+		},
+		{
+			String: "%dC",
+			Expected: false,
+		},
+		{
+			String: "%dc",
+			Expected: false,
+		},
+		{
+			String: "%dD",
+			Expected: false,
+		},
+		{
+			String: "%dd",
+			Expected: false,
+		},
+		{
+			String: "%dE",
+			Expected: false,
+		},
+		{
+			String: "%de",
+			Expected: false,
+		},
+		{
+			String: "%dF",
+			Expected: false,
+		},
+		{
+			String: "%df",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%E0",
+			Expected: true,
+		},
+		{
+			String: "%E1",
+			Expected: true,
+		},
+		{
+			String: "%E2",
+			Expected: true,
+		},
+		{
+			String: "%E3",
+			Expected: true,
+		},
+		{
+			String: "%E4",
+			Expected: true,
+		},
+		{
+			String: "%E5",
+			Expected: true,
+		},
+		{
+			String: "%E6",
+			Expected: true,
+		},
+		{
+			String: "%E7",
+			Expected: true,
+		},
+		{
+			String: "%E8",
+			Expected: true,
+		},
+		{
+			String: "%E9",
+			Expected: true,
+		},
+		{
+			String: "%EA",
+			Expected: true,
+		},
+		{
+			String: "%Ea",
+			Expected: false,
+		},
+		{
+			String: "%EB",
+			Expected: true,
+		},
+		{
+			String: "%Eb",
+			Expected: false,
+		},
+		{
+			String: "%EC",
+			Expected: true,
+		},
+		{
+			String: "%Ec",
+			Expected: false,
+		},
+		{
+			String: "%ED",
+			Expected: true,
+		},
+		{
+			String: "%Ed",
+			Expected: false,
+		},
+		{
+			String: "%EE",
+			Expected: true,
+		},
+		{
+			String: "%Ee",
+			Expected: false,
+		},
+		{
+			String: "%EF",
+			Expected: true,
+		},
+		{
+			String: "%Ef",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%e0",
+			Expected: false,
+		},
+		{
+			String: "%e1",
+			Expected: false,
+		},
+		{
+			String: "%e2",
+			Expected: false,
+		},
+		{
+			String: "%e3",
+			Expected: false,
+		},
+		{
+			String: "%e4",
+			Expected: false,
+		},
+		{
+			String: "%e5",
+			Expected: false,
+		},
+		{
+			String: "%e6",
+			Expected: false,
+		},
+		{
+			String: "%e7",
+			Expected: false,
+		},
+		{
+			String: "%e8",
+			Expected: false,
+		},
+		{
+			String: "%e9",
+			Expected: false,
+		},
+		{
+			String: "%eA",
+			Expected: false,
+		},
+		{
+			String: "%ea",
+			Expected: false,
+		},
+		{
+			String: "%eB",
+			Expected: false,
+		},
+		{
+			String: "%eb",
+			Expected: false,
+		},
+		{
+			String: "%eC",
+			Expected: false,
+		},
+		{
+			String: "%ec",
+			Expected: false,
+		},
+		{
+			String: "%eD",
+			Expected: false,
+		},
+		{
+			String: "%ed",
+			Expected: false,
+		},
+		{
+			String: "%eE",
+			Expected: false,
+		},
+		{
+			String: "%ee",
+			Expected: false,
+		},
+		{
+			String: "%eF",
+			Expected: false,
+		},
+		{
+			String: "%ef",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%F0",
+			Expected: true,
+		},
+		{
+			String: "%F1",
+			Expected: true,
+		},
+		{
+			String: "%F2",
+			Expected: true,
+		},
+		{
+			String: "%F3",
+			Expected: true,
+		},
+		{
+			String: "%F4",
+			Expected: true,
+		},
+		{
+			String: "%F5",
+			Expected: true,
+		},
+		{
+			String: "%F6",
+			Expected: true,
+		},
+		{
+			String: "%F7",
+			Expected: true,
+		},
+		{
+			String: "%F8",
+			Expected: true,
+		},
+		{
+			String: "%F9",
+			Expected: true,
+		},
+		{
+			String: "%FA",
+			Expected: true,
+		},
+		{
+			String: "%Fa",
+			Expected: false,
+		},
+		{
+			String: "%FB",
+			Expected: true,
+		},
+		{
+			String: "%Fb",
+			Expected: false,
+		},
+		{
+			String: "%FC",
+			Expected: true,
+		},
+		{
+			String: "%Fc",
+			Expected: false,
+		},
+		{
+			String: "%FD",
+			Expected: true,
+		},
+		{
+			String: "%Fd",
+			Expected: false,
+		},
+		{
+			String: "%FE",
+			Expected: true,
+		},
+		{
+			String: "%Fe",
+			Expected: false,
+		},
+		{
+			String: "%FF",
+			Expected: true,
+		},
+		{
+			String: "%Ff",
+			Expected: false,
+		},
+
+
+
+		{
+			String: "%f0",
+			Expected: false,
+		},
+		{
+			String: "%f1",
+			Expected: false,
+		},
+		{
+			String: "%f2",
+			Expected: false,
+		},
+		{
+			String: "%f3",
+			Expected: false,
+		},
+		{
+			String: "%f4",
+			Expected: false,
+		},
+		{
+			String: "%f5",
+			Expected: false,
+		},
+		{
+			String: "%f6",
+			Expected: false,
+		},
+		{
+			String: "%f7",
+			Expected: false,
+		},
+		{
+			String: "%f8",
+			Expected: false,
+		},
+		{
+			String: "%f9",
+			Expected: false,
+		},
+		{
+			String: "%fA",
+			Expected: false,
+		},
+		{
+			String: "%fa",
+			Expected: false,
+		},
+		{
+			String: "%fB",
+			Expected: false,
+		},
+		{
+			String: "%fb",
+			Expected: false,
+		},
+		{
+			String: "%fC",
+			Expected: false,
+		},
+		{
+			String: "%fc",
+			Expected: false,
+		},
+		{
+			String: "%fD",
+			Expected: false,
+		},
+		{
+			String: "%fd",
+			Expected: false,
+		},
+		{
+			String: "%fE",
+			Expected: false,
+		},
+		{
+			String: "%fe",
+			Expected: false,
+		},
+		{
+			String: "%fF",
+			Expected: false,
+		},
+		{
+			String: "%ff",
+			Expected: false,
+		},
+
+	}
+
+	{
+		randomness := rand.New(rand.NewSource( time.Now().UTC().UnixNano() ))
+
+		var hexchars []byte = []byte{'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'}
+		var chars []byte = []byte{' ','+','-','.','/','0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'}
+
+		for i:=0; i<0xFF; i++{
+
+			var p []byte
+
+			p = append(p, '%')
+			p = append(p, hexchars[randomness.Intn(len(hexchars))])
+			p = append(p, hexchars[randomness.Intn(len(hexchars))])
+
+			{
+				var limit int = 1 + randomness.Intn(5)
+
+				for j:=0; j<limit; j++ {
+					p = append(p, chars[randomness.Intn(len(chars))])
+				}
+			}
+
+
+			test := struct{
+				String string
+				Expected bool
+			}{
+				String: string(p),
+				Expected: true,
+			}
+
+			tests = append(tests, test)
+		}
+	}
+
+	for testNumber, test := range tests {
+		actual := rfc3986.HasPrefixPctEncoded(test.String)
+
+		expected := test.Expected
+
+		if expected != actual {
+			t.Errorf("For test #%d, the actual result is not what was expected.", testNumber)
+			t.Logf("EXPECTED: %t", expected)
+			t.Logf("ACTUAL:   %t", actual)
+			t.Logf("STRING: %q", test.String)
+			continue
+		}
+	}
+}