DNSWHOIS.INFO - 21.100.138.in-addr.arpa

Search for IP or hostnames:

21.100.138.in-addr.arpa checked at 2025-09-06T21:10:15.520Z 1543ms 49/49/49 100% R:24

`21.100.138.in-addr.arpa`

NS	`galileo.ccupm.upm.es`
		A	2001:720:41c:40:12:100:4:4 ^{🇪🇸 RedIRIS/Red.es}
			PTR	`galileo.ccupm.upm.es`
		A	138.100.4.4^{🇪🇸 RedIRIS/Red.es}
			PTR	`galileo.ccupm.upm.es`
NS	`dir.etsit.upm.es`
		A	138.100.17.10^{🇪🇸 RedIRIS/Red.es}
			PTR	`dir.etsit.upm.es`
			PTR	`selfie.etsit.upm.es`
NS	`dns.etsit.upm.es`
		A	138.100.17.4^{🇪🇸 RedIRIS/Red.es}
			PTR	`dns.etsit.upm.es`

`100.138.in-addr.arpa`

	NS	`chico.rediris.es`
	NS	`sun.rediris.es`
	NS	`einstein.ccupm.upm.es`
	NS	`galileo.ccupm.upm.es`

Up
`99.21.100.138.in-addr.arpa`
`149.21.100.138.in-addr.arpa`
`69.21.100.138.in-addr.arpa`
`142.21.100.138.in-addr.arpa`
`134.21.100.138.in-addr.arpa`
`147.21.100.138.in-addr.arpa`
`137.21.100.138.in-addr.arpa`
`136.21.100.138.in-addr.arpa`
`181.21.100.138.in-addr.arpa`
`138.21.100.138.in-addr.arpa`
`172.21.100.138.in-addr.arpa`
`2.21.100.138.in-addr.arpa`
`129.21.100.138.in-addr.arpa`
`156.21.100.138.in-addr.arpa`
`253.21.100.138.in-addr.arpa`
`190.21.100.138.in-addr.arpa`
`132.21.100.138.in-addr.arpa`
`143.21.100.138.in-addr.arpa`
`139.21.100.138.in-addr.arpa`
`141.21.100.138.in-addr.arpa`
`77.21.100.138.in-addr.arpa`
`254.21.100.138.in-addr.arpa`
`185.21.100.138.in-addr.arpa`
`53.21.100.138.in-addr.arpa`
`133.21.100.138.in-addr.arpa`
`140.21.100.138.in-addr.arpa`

Starts with same word
`21.by`
`21.com.es`
`21.life`
`21.run`
`21.net`
`21.la`
`21.ag`
`21.diamonds`
`21.cn`
`21.de`
`21.training`
`21.ca`
`21.construction`
`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`
`21.nu`
`21.business`
`21.casino`
`21.pl`
`21.ee`
`21.tv`
`21.partners`
`21.to`
`21.ie`
`21.photos`
`21.cc`
`21.fr`

Starts similarily
`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`
`12.world`
`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.construction`
`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`
`12.lt`
`21.tv`

AI analysis

Host names 99.21.100.138.in-addr.arpa, 149.21.100.138.in-addr.arpa, 69.21.100.138.in-addr.arpa, 142.21.100.138.in-addr.arpa, 134.21.100.138.in-addr.arpa and others fall under the parent 21.100.138.in-addr.arpa.

Three name servers, galileo.ccupm.upm.es, dir.etsit.upm.es, and dns.etsit.upm.es, are assigned to 21.100.138.in-addr.arpa.

The name servers of 21.100.138.in-addr.arpa are at least partially shared with other domains such as cbgp.upm.es, dia.fi.upm.es, ma.upm.es, 67.100.138.in-addr.arpa, and etsia.upm.es.

Often, the name servers einstein.ccupm.upm.es, dns2.dit.upm.es, dns.dit.upm.es, isp1.etsit.upm.es, chita.fi.upm.es, ns.fi.upm.es, tarzan.fi.upm.es, zape.fi.upm.es, glo.etsit.upm.es, and dns2.etsit.upm.es are used together.

galileo.ccupm.upm.es points to two IP numbers: 2001:720:41c:40:12:100:4:4 and 138.100.4.4. dir.etsit.upm.es points to one IP number: 138.100.17.10. dns.etsit.upm.es points to one IP number: 138.100.17.4.

dbq