WWW.RTSAK.COM - 121.56.in-addr.arpa

Search for IP or hostnames:

121.56.in-addr.arpa checked at 2025-09-06T13:42:28.218Z 323ms 41/41/41 100% R:11

`121.56.in-addr.arpa`

NS	`dns082.usps.com`
		A	2610:68:5130:11:1410::25 ^{🇺🇸 AS5774}
		A	56.0.82.25^{🇺🇸 AS5774}
			PTR	`dns082.usps.com`
			PTR	`samtcabcexsldns1.usps.com`
			PTR	`dns082.usps.gov`
NS	`dns141.usps.com`
		A	2610:68:3130:25:6010::25 ^{🇺🇸 AS5774}
		A	56.0.141.25^{🇺🇸 AS5774}

`56.in-addr.arpa`

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

Starts with same word
`121.am`
`121.cc`
`121.com.au`
`121.marketing`
`121.fr`
`121.agency`
`121.cz`
`121.ru`
`121.eu`
`121.space`
`121.fi`
`121.church`
`121.la`
`121.care`
`121.ltd`
`121.de`
`121.biz`
`121.info`
`121.systems`
`121.ro`
`121.co`
`121.vn`
`121.bz`
`121.sk`
`121.com`
`121.li`
`121.cool`
`121.me`
`121.education`
`121.cm`
`121.lt`
`121.fm`
`121.coach`
`121.co.uk`
`121.in-addr.arpa`
`121.digital`
`121.cafe`
`121.jp`
`121.nu`
`121.wtf`
`121.it`
`121.com.cn`
`121.im`
`121.news`
`121.com.pl`
`121.support`
`121.global`
`121.zone`
`121.design`
`121.at`
`121.mx`
`121.expert`
`121.com.tw`
`121.ws`
`121.ag`

Starts similarily
`121.fm`
`112.ro`
`211.online`
`112.cz`
`211.in`
`112.cc`
`112.la`
`121.coach`
`211.net`
`112.social`
`121.co.uk`
`112.su`
`112.fi`
`112.in-addr.arpa`
`121.in-addr.arpa`
`121.digital`
`112.ie`
`121.cafe`
`211.de`
`211.su`
`112.barcelona`
`112.biz`
`121.jp`
`211.es`
`121.nu`
`121.wtf`
`211.se`
`112.ua`
`112.ru`
`121.it`
`121.com.cn`
`211.la`
`211.ca`
`121.im`
`211.chat`
`211.com.ua`
`121.news`
`112.tv`
`112.mine.nu`
`121.com.pl`
`121.support`
`121.global`
`121.zone`
`112.pt`
`112.press`
`112.hr`
`112.de`
`121.design`
`121.at`
`112.md`
`112.agency`
`112.kiev.ua`
`211.ru`
`112.fm`
`121.mx`
`211.info`
`121.expert`
`121.com.tw`
`112.li`
`112.com.pl`
`211.tel`
`112.org`
`211.city`
`121.ws`
`112.pl`
`121.ag`
`112.life`
`112.cl`
`112.diamonds`
`211.co`
`112.wf`
`112.gov.pl`
`121.am`
`112.it`
`121.cc`
`121.com.au`
`121.marketing`
`112.srl`
`211.nl`
`211.eu`
`121.fr`
`121.agency`
`112.mk`
`121.cz`
`121.ru`
`121.eu`
`112.be`
`112.fr`
`112.gov.in`
`112.world`
`121.space`
`121.fi`
`112.hk`
`211.us`
`112.by`
`112.al`
`112.jp`
`211.cz`
`211.dk`
`112.gov.ge`
`121.church`
`112.gov.ua`
`211.ir`
`112.at`
`121.la`
`112.run`
`112.guide`
`121.care`
`112.events`
`112.no`
`121.ltd`
`112.lv`
`211.nyc`
`211.cc`
`121.de`
`211.org`
`112.com.tr`
`121.biz`
`121.info`
`211.it`
`112.io`
`121.systems`
`112.ee`
`121.ro`
`211.ltd`
`112.se`
`112.wiki`
`121.co`
`211.one`
`121.vn`
`112.is`
`211.life`
`121.bz`
`112.com`
`112.net`
`211.university`
`211.cn`
`112.kiwi`
`112.co`
`121.sk`
`211.mx`
`112.ir`
`112.ca`
`112.ski`
`121.com`
`112.dk`
`112.network`
`211.ph`
`121.li`
`112.com.vn`
`121.cool`
`121.me`
`112.es`
`112.ge`
`121.education`
`112.vn`
`112.today`
`211.in-addr.arpa`
`121.cm`
`112.hu`
`112.toys`
`121.lt`
`211.tw`
`112.lt`

AI analysis

Two name servers, dns082.usps.com and dns141.usps.com, are delegated to 121.56.in-addr.arpa.

The name server setup of 121.56.in-addr.arpa is identical to that of other domains such as usps-certified-email.net, 95.56.in-addr.arpa, 253.56.in-addr.arpa, uspost.org, and uspscom.com.

dns082.usps.com and dns141.usps.com both point to two IP numbers each: 2610:68:5130:11:1410::25, 56.0.82.25 and 2610:68:3130:25:6010::25, 56.0.141.25 respectively.

dbq