CF1763573210364-tsm20251116095642

DNSWHOIS.INFO - 56.121.38.in-addr.arpa

Search for IP or hostnames:

56.121.38.in-addr.arpa checked at 2025-11-19T17:26:50.294Z 5047ms 43/43/47 91% R:10 allDone:false timedOut:true

56.121.38.in-addr.arpa

NSauth1.dns.cogentco.com
A2001:550:1:a::d 🇺🇸 AS174
PTRauth1.dns.cogentco.com
A66.28.0.14🇺🇸 AS174
PTRauth1.dns.cogentco.com
NSauth2.dns.cogentco.com
A2001:550:1:b::d 🇺🇸 AS174
PTRauth2.dns.cogentco.com
A66.28.0.30🇺🇸 AS174
PTRauth2.dns.cogentco.com

121.38.in-addr.arpa

NSauth1.dns.cogentco.com
NSauth2.dns.cogentco.com

Starts with same word

Starts similarily

AI analysis

56.121.38.in-addr.arpa is delegated to two name servers: auth1.dns.cogentco.com and auth2.dns.cogentco.com.

56.121.38.in-addr.arpa uses the same name server setup as other domains such as f.0.0.0.0.0.0.0.0.0.0.0.6.0.0.0.2.0.0.0.8.7.9.0.1.0.0.2.ip6.arpa, 99.99.38.in-addr.arpa, nitusa.com, 3.202.38.in-addr.arpa and 52.9.38.in-addr.arpa.

56.121.38.in-addr.arpa shares name servers with other domains at least partially, for example 20.132.66.in-addr.arpa, bandcampberlin.de, upsonline.com.au, 117.231.67.in-addr.arpa and ups.hu.

These name servers are commonly used alongside nsa.ups.com, nsb.ups.com, cbru.br.ns.els-gms.att.net, cmtu.mt.ns.els-gms.att.net, ns1.vodafone-ip.de and ns2.vodafone-ip.de.

Host names with two IP numbers:

auth1.dns.cogentco.com points to 2001:550:1:a::d and 66.28.0.14; auth2.dns.cogentco.com points to 2001:550:1:b::d and 66.28.0.30.

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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