diff --git a/README.md b/README.md
index 14179f3..a2fbc58 100644
--- a/README.md
+++ b/README.md
@@ -1106,8 +1106,8 @@
     Neustar IP & Geolocation Lookup Tool
     <https://www.risk.neustar/resources/tools/ip-geolocation-lookup-tool>
   *
-    Neustar UltraTools - ASN Lookup Tool
-    <https://www.ultratools.com/tools>
+    DNSChecker - ASN Lookup Tool
+    <https://dnschecker.org/asn-whois-lookup.php>
   *
     Online Curl
     <https://onlinecurl.com/>