diff --git a/src/model.rs b/src/model.rs
index a361327..7297ae6 100644
--- a/src/model.rs
+++ b/src/model.rs
@@ -360,7 +360,7 @@ mod tests {
     }
 
     #[test]
-    fn match_ips() {
+    fn match_ipv4s() {
         let buffer = "Lorem ipsum 127.0.0.1 lorem\n Lorem 255.255.10.255 lorem 127.0.0.1 lorem";
         let named_pat = vec![];
         let custom = vec![];
@@ -368,8 +368,11 @@ mod tests {
         let results = Model::new(buffer, &alphabet, &named_pat, &custom, false).matches(false);
 
         assert_eq!(results.len(), 3);
+        assert_eq!(results.get(0).unwrap().pattern, "ipv4");
         assert_eq!(results.get(0).unwrap().text, "127.0.0.1");
+        assert_eq!(results.get(1).unwrap().pattern, "ipv4");
         assert_eq!(results.get(1).unwrap().text, "255.255.10.255");
+        assert_eq!(results.get(2).unwrap().pattern, "ipv4");
         assert_eq!(results.get(2).unwrap().text, "127.0.0.1");
     }
 
diff --git a/src/regexes.rs b/src/regexes.rs
index f8f3f87..9bb81fa 100644
--- a/src/regexes.rs
+++ b/src/regexes.rs
@@ -3,6 +3,10 @@ use crate::error;
 pub const EXCLUDE_PATTERNS: [(&'static str, &'static str); 1] =
     [("ansi_colors", r"[[:cntrl:]]\[([0-9]{1,2};)?([0-9]{1,2})?m")];
 
+/// Holds all the regex patterns that are currently supported.
+///
+/// The email address was obtained at https://www.regular-expressions.info/email.html.
+/// Others were obtained from Ferran Basora.
 pub const PATTERNS: [(&'static str, &'static str); 15] = [
     ("markdown-url", r"\[[^]]*\]\(([^)]+)\)"),
     (
@@ -21,7 +25,7 @@ pub const PATTERNS: [(&'static str, &'static str); 15] = [
     ),
     ("ipfs", r"Qm[0-9a-zA-Z]{44}"),
     ("sha", r"[0-9a-f]{7,40}"),
-    ("ip", r"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"),
+    ("ipv4", r"\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}"),
     ("ipv6", r"[A-f0-9:]+:+[A-f0-9:]+[%\w\d]+"),
     ("mem-address", r"0x[0-9a-fA-F]+"),
     ("number", r"[0-9]{4,}"),