Robtex

Up: 87.237.136.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 87.237.137.0/25
Down right: 87.237.137.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.237.137.2	A+PTR	ns.gaztelecom.ru
87.237.137.2	A+PTR	ns1.gtconline.ru
87.237.137.2	A	ns.gazpromtelecom.ru
87.237.137.19	A+PTR	www.gaztelecom.ru
87.237.137.19	A	gazpromtelekom.com
87.237.137.19	A	xn--80afhaiufkr9a.xn--p1ai
87.237.137.27	A+PTR	mail.gazpromtelecom.ru
87.237.137.27	A	mailhost.gaztelecom.ru
87.237.137.27	A	mailhost.gazpromtelecom.ru
87.237.137.90	A+PTR	mail.gtconline.ru
87.237.137.90	A	smtp.t50.ru
87.237.137.90	A	mx.teleintercom.ru
87.237.137.98	PTR	nnm.gaztelecom.ru
87.237.137.99	A	post.gtconline.ru
87.237.137.112	A	www.teleintercom.ru