IPLIST.NET - 251.204.in-addr.arpa

Search for IP or hostnames:

251.204.in-addr.arpa checked at 2025-11-02T02:37:12.550Z 122ms 50/50/50 100% R:12

`251.204.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`

`204.in-addr.arpa`

	NS	`r.arin.net`
	NS	`u.arin.net`
	NS	`x.arin.net`
	NS	`y.arin.net`
	NS	`z.arin.net`
	NS	`arin.authdns.ripe.net`

Up

32.251.204.in-addr.arpa

35.251.204.in-addr.arpa

33.251.204.in-addr.arpa

230.251.204.in-addr.arpa

34.251.204.in-addr.arpa

175.251.204.in-addr.arpa

Starts with same word

251.at

251.us

251.ca

251.de

251.ru

251.sh

251.nl

251.com.cn

251.ph

251.in

251.cz

251.cc

251.fr

251.eu

251.com

Starts similarily

521.cc

512.nl

512.it

521.gold

125.net

125.ru

152.tv

521.be

152.com.au

215.io

512.zone

125.vn

521.cn

521.xyz

512.cc

512.kz

125.in-addr.arpa

521.center

215.life

125.la

125.jp

512.net

125.at

152.io

251.sh

125.fr

251.nl

512.com.do

512.be

125.name

215.in-addr.arpa

251.com.cn

125.de

125.com

521.at

512.bike

512.biz

215.cn

125.nyc

152.co.il

251.ph

251.in

152.tel

125.ir

512.fr

215.pl

125.pl

512.ch

512.consulting

215.fr

512.solar

125.ovh

125.cc

521.co

251.cz

512.vin

125.tel

251.cc

125.be

521.it

125.cz

152.in

251.fr

521.moe

215.eu

125.in

215.tel

215.be

215.tech

152.jp

215.ir

251.eu

521.in

251.com

215.fi

125.dk

521.run

512.com.tw

521.me

215.de

152.nl

512.eu

125.nu

512.am

512.in

152.eu

512.hu

152.uk

512.group

125.cn

215.marketing

521.dk

152.cn

251.at

152.info

125.group

521.eu

125.tv

512.cz

521.shopping

AI analysis

251.204.in-addr.arpa is the parent of 32.251.204.in-addr.arpa, 35.251.204.in-addr.arpa, 33.251.204.in-addr.arpa, 230.251.204.in-addr.arpa, 34.251.204.in-addr.arpa and a few other host names.

Two name servers auth1.dns.cogentco.com and auth2.dns.cogentco.com are delegated to 251.204.in-addr.arpa.

251.204.in-addr.arpa uses the same name server configuration as other domains, such as 70.28.66.in-addr.arpa, 148.88.38.in-addr.arpa, blankrome.com, 225.100.38.in-addr.arpa and texpool.net.

251.204.in-addr.arpa at least partially shares name servers with other domains such as postsecondaryresearch.org, facil.columbia.edu, 224.183.206.in-addr.arpa, 214.138.192.in-addr.arpa and canadianhealthinfoway.com.

These name servers are often used together with ns1.fnsi.net, ns2.fnsi.net, ns3.fnsi.net, ns1.infoway-inforoute.ca, ns2.infoway-inforoute.ca, ext-ns1.columbia.edu, auth4.dns.cogentco.com and auth5.dns.cogentco.com.

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