diff --git a/README.md b/README.md
index 76d37ff..bee51e5 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@ mongoose-types - Useful types and type plugins for Mongoose
 
 - Email
 - Url
+- IPv4 Addresses
 
 ### Plugins include:
 
@@ -53,6 +54,14 @@ Once you are setup, you can begin to use the new types.
       , referer: Url
     });
 
+#### IPv4 Addresses
+
+    var IPv4 = mongoose.SchemaTypes.IPv4;
+    var ConnectionSchema = new Schema({
+	sender : IPv4
+      , recipient : IPv4
+    });
+
 ### Using the plugins
 
 #### The `useTimestamps` plugin
diff --git a/lib/types/ipv4.js b/lib/types/ipv4.js
new file mode 100644
index 0000000..f23d0f3
--- /dev/null
+++ b/lib/types/ipv4.js
@@ -0,0 +1,20 @@
+var mongoose = require('mongoose')
+
+module.exports.loadType = function (mongoose) {
+  var SchemaTypes = mongoose.SchemaTypes;
+
+function IPv4 (path, options) {
+  SchemaTypes.String.call(this, path, options);
+  function validateIPv4(val) {
+    return /^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$/gm.test(val);
+  }
+  this.validate(validateIPv4, 'IPv4 Address is invalid');
+}
+  IPv4.prototype.__proto__ = SchemaTypes.String.prototype;
+  IPv4.prototype.cast = function (val) {
+    return val.toLowerCase();
+  };
+  SchemaTypes.IPv4 = IPv4;
+  mongoose.Types.IPv4 = String;
+};
+