CF1763480490241-tsm20251116095642

MXLIST.NET - 164.21.4.in-addr.arpa

Search for IP or hostnames:

164.21.4.in-addr.arpa checked at 2025-11-18T15:41:30.199Z 378ms 45/45/45 100% R:10 allDone:true timedOut:false

164.21.4.in-addr.arpa

NSdnsauth1.sys.gtei.net
A4.2.49.2🇺🇸 LEVEL3
PTRdnsauth1.level3.net
NSdnsauth2.sys.gtei.net
A4.2.49.3🇺🇸 LEVEL3
PTRdnsauth2.level3.net
NSdnsauth3.sys.gtei.net
A4.2.49.4🇺🇸 LEVEL3
PTRdnsauth3.level3.net

21.4.in-addr.arpa

NSdnsauth1.sys.gtei.net
NSdnsauth2.sys.gtei.net
NSdnsauth3.sys.gtei.net

Up

Starts with same word

Starts similarily

AI analysis

164.21.4.in-addr.arpa is the parent of 61.164.21.4.in-addr.arpa, 6.164.21.4.in-addr.arpa and 60.164.21.4.in-addr.arpa.

164.21.4.in-addr.arpa is delegated to three name servers dnsauth1.sys.gtei.net, dnsauth2.sys.gtei.net and dnsauth3.sys.gtei.net.

164.21.4.in-addr.arpa at least partially shares name servers with other domains, for instance 35.84.209.in-addr.arpa, 61.7.4.in-addr.arpa, nmilink.com, 16.40.4.in-addr.arpa and 124.47.4.in-addr.arpa.

These name servers are commonly used alongside hyperion.haystack.edu and planck.haystack.edu.

Host names with one IP number: dnsauth1.sys.gtei.net points to 4.2.49.2; dnsauth2.sys.gtei.net points to 4.2.49.3; dnsauth3.sys.gtei.net points to 4.2.49.4.

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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