DNSWHOIS.INFO - 21.38.in-addr.arpa

Search for IP or hostnames:

21.38.in-addr.arpa checked at 2025-10-28T21:05:58.510Z 103ms 50/50/50 100% R:13

`21.38.in-addr.arpa`

NS	`auth1.dns.cogentco.com`
		A	2001:550:1:a::d ^{🇺🇸 COGENT}
			PTR	`auth1.dns.cogentco.com`
		A	66.28.0.14^{🇺🇸 COGENT}
			PTR	`auth1.dns.cogentco.com`
NS	`auth2.dns.cogentco.com`
		A	2001:550:1:b::d ^{🇺🇸 COGENT}
			PTR	`auth2.dns.cogentco.com`
		A	66.28.0.30^{🇺🇸 COGENT}
			PTR	`auth2.dns.cogentco.com`

`38.in-addr.arpa`

	NS	`auth1.dns.cogentco.com`
	NS	`auth2.dns.cogentco.com`

Up

46.21.38.in-addr.arpa

25.21.38.in-addr.arpa

198.21.38.in-addr.arpa

20.21.38.in-addr.arpa

21.21.38.in-addr.arpa

17.21.38.in-addr.arpa

18.21.38.in-addr.arpa

201.21.38.in-addr.arpa

168.21.38.in-addr.arpa

Starts with same word

21.fr

21.by

21.com.es

21.life

21.run

21.org.cn

21.net

21.game

21.la

21.diamonds

21.cn

21.de

21.training

21.ca

21.org

21.co.uk

21.vc

21.am

21.rs

21.com

21.bet

21.center

21.kz

21.web.app

21.su

21.network

21.si

21.ph

21.is

21.be

21.com.ua

21.pe

21.edu.ar

21.gg

21.capital

21.dk

21.email

21.sk

21.immo

21.cz

21.style

21.nl

21.agency

21.co

21.biz

21.lv

21.ru

21.finance

21.ax

21.nu

21.business

21.casino

21.pl

21.ee

21.tv

21.partners

21.to

21.ie

21.photos

21.cc

Starts similarily

21.com.es

21.life

12.cm

21.run

12.world

21.org.cn

12.by

21.net

12.org.ua

12.works

21.game

12.uz

21.la

21.diamonds

21.cn

21.de

21.training

21.ca

12.ca

21.org

12.ru

21.co.uk

12.limo

21.vc

21.am

12.biz

21.rs

12.to

21.com

12.net

12.la

21.bet

12.at

21.center

21.kz

12.s3.amazonaws.com

21.web.app

21.su

21.network

21.si

21.ph

12.lv

21.is

21.be

21.com.ua

12.cl

12.ph

12.ma

12.rs

21.pe

21.edu.ar

21.gg

21.capital

12.de

12.in-addr.arpa

21.dk

12.ag

21.email

12.kz

12.ie

12.com.ua

21.sk

12.cz

21.immo

12.eu

21.cz

12.uk

21.style

12.city

12.dk

21.nl

21.agency

12.org.ru

12.nu

21.co

21.biz

21.lv

21.ru

21.finance

12.hk

21.ax

12.amsterdam

12.fr

21.nu

21.business

12.vc

21.casino

21.pl

21.ee

12.am

12.agency

12.digital

12.ac.cn

12.lt

21.tv

12.si

21.partners

21.to

21.ie

21.photos

21.cc

12.be

12.fi

12.cc

12.is

21.fr

12.chat

21.by

12.solutions

12.dyndns.tv

AI analysis

21.38.in-addr.arpa is the parent of 46.21.38.in-addr.arpa, 25.21.38.in-addr.arpa, 198.21.38.in-addr.arpa, 20.21.38.in-addr.arpa, 21.21.38.in-addr.arpa and a few other host names.

Two name servers auth1.dns.cogentco.com and auth2.dns.cogentco.com are delegated to 21.38.in-addr.arpa.

21.38.in-addr.arpa uses the same name server configuration as other domains, such as 24.221.38.in-addr.arpa, par08.atlas.cogentco.com, 0.61.209.in-addr.arpa, 1.111.38.in-addr.arpa and 132.92.38.in-addr.arpa.

21.38.in-addr.arpa at least partially shares name servers with other domains such as upsquantumview.com, 142.41.206.in-addr.arpa, motorcargo.biz, rbb24.de and rbb-online.info.

These name servers are often used together with cbru.br.ns.els-gms.att.net, cmtu.mt.ns.els-gms.att.net, nsa.ups.com, nsb.ups.com, ns1.vodafone-ip.de, ns2.vodafone-ip.de, ns1.fnsi.net, ns2.fnsi.net, ns3.fnsi.net and ns1.netrail.net.

Host names with two IPs:

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.

dbq