DNSWHOIS.INFO - 21.17.192.in-addr.arpa

Search for IP or hostnames:

21.17.192.in-addr.arpa checked at 2025-10-17T17:15:17.961Z 160ms 57/57/57 100% R:11

`21.17.192.in-addr.arpa`

NS	`dns1.illinois.edu`
		A	2620:0:e00:b::53 ^{🇺🇸 UIUC}
			PTR	`dns1.illinois.edu`
		A	130.126.2.100^{🇺🇸 UIUC}
			PTR	`dns1.illinois.edu`
NS	`dns2.illinois.edu`
		A	2620:0:e00:c::53 ^{🇺🇸 UIUC}
			PTR	`dns2.illinois.edu`
		A	130.126.2.120^{🇺🇸 UIUC}
			PTR	`dns2.illinois.edu`
NS	`dns3.illinois.edu`
		A	2600:1f16:8b2:2e53::53 ^{🇺🇸 Amazon}
			PTR	`dns3.illinois.edu`
		A	3.16.92.183^{🇺🇸 Amazon}
			PTR	`dns3.illinois.edu`

`17.192.in-addr.arpa`

	NS	`dns1.illinois.edu`
	NS	`dns2.illinois.edu`
	NS	`dns3.illinois.edu`

Up

81.21.17.192.in-addr.arpa

64-26.21.17.192.in-addr.arpa

68.21.17.192.in-addr.arpa

76.21.17.192.in-addr.arpa

Starts with same word

21.nu

21.business

21.casino

21.pl

21.ee

21.tv

21.partners

21.to

21.ie

21.photos

21.cc

21.fr

21.by

21.com.es

21.life

21.run

21.pw

21.org.cn

21.net

21.la

21.ag

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.gen.tr

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.co.za

21.finance

21.ax

Starts similarily

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

21.com.es

21.life

12.cm

21.run

21.pw

12.world

21.org.cn

12.by

21.net

12.org.ua

12.works

12.uz

21.la

21.ag

21.diamonds

21.cn

21.de

21.training

21.ca

12.ca

21.org

12.sh.cn

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.ws

12.s3.amazonaws.com

21.web.app

21.su

21.network

21.si

21.gen.tr

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

12.life

21.style

12.city

12.dk

21.nl

21.agency

12.org.ru

12.nu

21.co

21.biz

21.lv

21.ru

21.co.za

12.ai

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

AI analysis

21.17.192.in-addr.arpa is a parent of 81.21.17.192.in-addr.arpa, 64-26.21.17.192.in-addr.arpa, 68.21.17.192.in-addr.arpa and 76.21.17.192.in-addr.arpa.

The domain 21.17.192.in-addr.arpa is delegated to three name servers: dns1.illinois.edu, dns2.illinois.edu and dns3.illinois.edu.

21.17.192.in-addr.arpa shares name servers with other domains at least partially, for instance 246.174.128.in-addr.arpa, 16-28.98.17.192.in-addr.arpa, it.oce.illinois.edu, 67.36.72.in-addr.arpa and 141.174.128.in-addr.arpa.

these name servers are often used with uicdns1.admin.uillinois.edu, uiucdns1.admin.uillinois.edu and duplicity.igb.illinois.edu.

Host names with two IP numbers:

dns1.illinois.edu points to 2620:0:e00:b::53 and 130.126.2.100

dns2.illinois.edu points to 2620:0:e00:c::53 and 130.126.2.120

dns3.illinois.edu points to 2600:1f16:8b2:2e53::53 and 3.16.92.183

dbq