diff --git a/README.md b/README.md
index 8db6223..054f294 100644
--- a/README.md
+++ b/README.md
@@ -146,6 +146,7 @@ Baked-in Validations
 | btc_addr | Bitcoin Address |
 | btc_addr_bech32 | Bitcoin Bech32 Address (segwit) |
 | datetime | Datetime |
+| e164 | e164 formatted phone number |
 | email | E-mail String
 | eth_addr | Ethereum Address |
 | hexadecimal | Hexadecimal String |
@@ -186,7 +187,7 @@ Baked-in Validations
 | Tag | Description |
 | - | - |
 | dir | Directory |
-| e164 | NOT DOCUMENTED IN doc.go |
+| endswith | Ends With |
 | excludes | Excludes |
 | excludesall | Excludes All |
 | excludesrune | Excludes Rune |
diff --git a/doc.go b/doc.go
index aeeedd8..1b1957e 100644
--- a/doc.go
+++ b/doc.go
@@ -790,6 +790,13 @@ This validates that a string value contains a valid hsla color
 
 	Usage: hsla
 
+E.164 Phone Number String
+
+This validates that a string value contains a valid E.164 Phone number
+https://en.wikipedia.org/wiki/E.164 (ex. +1123456789)
+
+	Usage: e164
+
 E-mail String
 
 This validates that a string value contains a valid email