diff --git a/X10D/src/Net/IpAddressExtensions.cs b/X10D/src/Net/IpAddressExtensions.cs
new file mode 100644
index 0000000..12d0971
--- /dev/null
+++ b/X10D/src/Net/IpAddressExtensions.cs
@@ -0,0 +1,34 @@
+using System.Net;
+using System.Net.Sockets;
+
+namespace X10D.Net;
+
+/// <summary>
+///     Extension methods for <see cref="IPAddress" />.
+/// </summary>
+public static class IpAddressExtensions
+{
+    /// <summary>
+    ///     Returns a value indicating whether the specified IP address is a valid IPv4 address.
+    /// </summary>
+    /// <param name="address">The IP address to check.</param>
+    /// <returns>
+    ///     <see langword="true" /> if the specified IP address is a valid IPv4 address; otherwise, <see langword="false" />.
+    /// </returns>
+    public static bool IsIpV4(this IPAddress address)
+    {
+        return address.AddressFamily == AddressFamily.InterNetwork;
+    }
+
+    /// <summary>
+    ///     Returns a value indicating whether the specified IP address is a valid IPv6 address.
+    /// </summary>
+    /// <param name="address">The IP address to check.</param>
+    /// <returns>
+    ///     <see langword="true" /> if the specified IP address is a valid IPv6 address; otherwise, <see langword="false" />.
+    /// </returns>
+    public static bool IsIpV6(this IPAddress address)
+    {
+        return address.AddressFamily == AddressFamily.InterNetworkV6;
+    }
+}