CF1763270731692-tsm20251109205412

WWW.RTSAK.COM - 21.66.77.in-addr.arpa

Search for IP or hostnames:

21.66.77.in-addr.arpa checked at 2025-11-16T05:25:31.673Z 297ms 47/47/47 100% R:20 allDone:true timedOut:false

21.66.77.in-addr.arpa

NSauthns1.ngdc.net
A2001:1448:0:a800::53 🇩🇰 NGDC
PTRauthns1.ngdc.net
A217.30.38.181🇩🇰 SENTIA
PTRdns1.sentia.dk
NSauthns2.ngdc.net
A2001:1448:0:a500::53 🇩🇰 NGDC
PTRauthns2.ngdc.net
A217.30.38.27🇩🇰 SENTIA
PTRdns2.sentia.dk

66.77.in-addr.arpa

Up

Starts with same word

Starts similarily

AI analysis

21.66.77.in-addr.arpa is parent of 9.21.66.77.in-addr.arpa, 11.21.66.77.in-addr.arpa, 161.21.66.77.in-addr.arpa and 98.21.66.77.in-addr.arpa.

21.66.77.in-addr.arpa's delegation uses two name servers, authns1.ngdc.net and authns2.ngdc.net.

21.66.77.in-addr.arpa shares the same name server setup as other domains, for example cph.ngdc.net, cex3d.net, ngdc.biz, 255.116.217.in-addr.arpa and hardcoreprocessing.com.

21.66.77.in-addr.arpa shares some name servers with other domains, such as 76.66.77.in-addr.arpa, tackmann.dk, 227.116.217.in-addr.arpa and 6.66.77.in-addr.arpa.

Host names with two IPs:

authns1.ngdc.net points to: 2001:1448:0:a800::53 and 217.30.38.181

authns2.ngdc.net points to: 2001:1448:0:a500::53 and 217.30.38.27

Perform reverse DNS lookup as well as normal forward DNS. Check Autonomous System Numbers (ASNs) and BGP connections between Internet Service Providers.
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