diff --git a/lib/net/external.js b/lib/net/external.js
index e0306c8a..82b59276 100644
--- a/lib/net/external.js
+++ b/lib/net/external.js
@@ -35,12 +35,11 @@ external.getIPv4 = async function getIPv4() {
     return await external.getIPv42();
   }
 
-  ip = res.body.trim();
-
   try {
+    ip = res.body.trim();
     ip = IP.toBuffer(ip);
 
-    if (!IP.isMapped(ip))
+    if (!IP.isIPv4(ip))
       throw new Error('Could not find IPv4.');
 
     ip = IP.toString(ip);
@@ -76,7 +75,7 @@ external.getIPv42 = async function getIPv42() {
   ip = match[1];
   raw = IP.toBuffer(ip);
 
-  if (!IP.isMapped(raw))
+  if (!IP.isIPv4(raw))
     throw new Error('Could not find IPv4.');
 
   return IP.toString(raw);
@@ -101,7 +100,7 @@ external.getIPv6 = async function getIPv6() {
   ip = res.body.trim();
   ip = IP.toBuffer(ip);
 
-  if (IP.isMapped(ip))
+  if (!IP.isIPv6(ip))
     throw new Error('Could not find IPv6.');
 
   return IP.toString(ip);