Robtex

Up: 212.12.12.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 212.12.13.0/25
Down right: 212.12.13.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.12.13.0	PTR	rev-0-13-12-212.tula.net
212.12.13.66	A+PTR	mail1.tularegion.ru
212.12.13.67	PTR	mn2.tularegion.ru
212.12.13.73	PTR	mn8.tularegion.ru
212.12.13.73	A	mx.tularegion.org
212.12.13.79	PTR	mn14.tularegion.ru
212.12.13.79	A	mail.tularegion.org
212.12.13.80	PTR	mn15.tularegion.ru
212.12.13.80	A	project.tularegion.ru
212.12.13.83	PTR	mn18.tularegion.ru
212.12.13.83	A	prognoz.tularegion.ru
212.12.13.85	PTR	mn20.tularegion.ru
212.12.13.87	PTR	mn22.tularegion.ru
212.12.13.87	A	mirsud.tularegion.ru
212.12.13.90	PTR	mn25.tularegion.ru
212.12.13.90	A	www.gosuslugi71.ru
212.12.13.94	A	www.dopobr71.ru
212.12.13.94	A	dopobr71.ru
212.12.13.94	A	visit-tula.ru
212.12.13.98	A+PTR	smtp1.mfc71.ru
212.12.13.103	PTR	mn38.tularegion.ru
212.12.13.103	A	gosuslugi71.ru
212.12.13.104	PTR	mn39.tularegion.ru
212.12.13.104	A	mail.doctor71.ru
212.12.13.104	A	doctor71.ru
212.12.13.111	PTR	mn46.tularegion.ru
212.12.13.111	A	prognoz.tularegion.ru
212.12.13.111	A	edu71.ru
212.12.13.113	PTR	mn48.tularegion.ru
212.12.13.113	A	imap.tularegion.ru
212.12.13.113	A	mail.tularegion.ru
212.12.13.255	PTR	rev-255-13-12-212.tula.net