diff --git a/README.md b/README.md
index 7b114d5..06776a1 100644
--- a/README.md
+++ b/README.md
@@ -231,6 +231,7 @@ A curated list of awesome search engines useful during Penetration testing, Vuln
 - [360 PassiveDNS.CN](https://passivedns.cn/) - Biggest public available db in China designed for security and research purpose
 - [MXtoolbox](https://mxtoolbox.com/SuperTool.aspx) - All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool
 - [NSLookup.io](https://www.nslookup.io/) - Find all DNS records for a domain name using this online tool
+- [Robtex DNS Lookup](https://www.robtex.com/dns-lookup/) - Get detailed information on the nameservers associated with a domain name
 
 ### Certificates