diff --git a/src/net/AllocatedSocketAddress.hxx b/src/net/AllocatedSocketAddress.hxx
index 0c2de69b4..eb2433af5 100644
--- a/src/net/AllocatedSocketAddress.hxx
+++ b/src/net/AllocatedSocketAddress.hxx
@@ -175,6 +175,14 @@ public:
 		return ((SocketAddress)*this).IsV4Mapped();
 	}
 
+	/**
+	 * Does the address family support port numbers?
+	 */
+	[[gnu::pure]]
+	bool HasPort() const noexcept {
+		return ((SocketAddress)*this).HasPort();
+	}
+
 	/**
 	 * Extract the port number.  Returns 0 if not applicable.
 	 */
diff --git a/src/net/SocketAddress.hxx b/src/net/SocketAddress.hxx
index 9d5297e21..184eb4714 100644
--- a/src/net/SocketAddress.hxx
+++ b/src/net/SocketAddress.hxx
@@ -163,6 +163,15 @@ public:
 	[[gnu::pure]]
 	IPv4Address UnmapV4() const noexcept;
 
+	/**
+	 * Does the address family support port numbers?
+	 */
+	[[gnu::pure]]
+	bool HasPort() const noexcept {
+		return !IsNull() &&
+			(GetFamily() == AF_INET || GetFamily() == AF_INET6);
+	}
+
 	/**
 	 * Extract the port number.  Returns 0 if not applicable.
 	 */