Robtex

Up: 91.144.142.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 91.144.142.0/25
Down right: 91.144.142.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.144.142.2	PTR	dynamicip-91-144-142-2.pppoe.kzn.ertelecom.ru
91.144.142.3	PTR	dynamicip-91-144-142-3.pppoe.kzn.ertelecom.ru
91.144.142.11	PTR	mail.ppmr.ru
91.144.142.15	PTR	mail.kirkazan.ru
91.144.142.19	PTR	91x144x142x19.static-business.kzn.ertelecom.ru
91.144.142.52	PTR	91x144x142x52.static-business.kzn.ertelecom.ru
91.144.142.52	A	kaz-saturn.ru
91.144.142.59	PTR	mx2.barsmedia.ru
91.144.142.59	A	mail3.barsmedia.ru
91.144.142.68	A	uksloboda.ru
91.144.142.72	PTR	npovti.ru
91.144.142.80	PTR	91x144x142x80.static-business.kzn.ertelecom.ru
91.144.142.86	A+PTR	garsoft.ru
91.144.142.86	PTR	mail.garsoft.ru
91.144.142.86	A+PTR	rb.garsoft.ru
91.144.142.90	PTR	kazan.rostagroup.ru
91.144.142.125	PTR	91x144x142x125.static-business.kzn.ertelecom.ru
91.144.142.145	A	mail.vitacore.ru
91.144.142.160	PTR	kiel-kazan.ru
91.144.142.181	PTR	91x144x142x181.static-business.kzn.ertelecom.ru
91.144.142.181	A	konstanta.pro
91.144.142.181	A	remote.konstanta.pro
91.144.142.190	PTR	kazan.rostagroup.ru
91.144.142.191	PTR	91x144x142x191.static-business.kzn.ertelecom.ru
91.144.142.191	A	kazan.it.ru
91.144.142.201	PTR	91x144x142x201.static-business.kzn.ertelecom.ru
91.144.142.201	A	avi-rc.ru
91.144.142.247	A	relay.laconix.com
91.144.142.247	A	relay.laconix.net