Robtex

Up: 77.73.88.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 77.73.88.0/23
Down right: 77.73.90.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.73.88.11	PTR	vpn1.southtel.ru
77.73.88.13	PTR	vpn3.southtel.ru
77.73.88.19	PTR	main-vpn1.southtel.ru
77.73.88.62	A	cash.southtel.ru
77.73.88.66	A	forum.southtel.ru
77.73.88.69	A	zvezdochka34.ru
77.73.88.70	A	xn----8sbqwktfb9g4a.xn--p1ai
77.73.88.82	A+PTR	mail.southtel.ru
77.73.88.83	PTR	southtel.ru
77.73.88.83	A	main-vpn1.southtel.ru
77.73.88.83	A	nas13.southtel.ru
77.73.88.253	A	xn----8sbqwktfb9g4a.xn--p1ai
77.73.89.2	A	mail2.unifoods.ru
77.73.89.10	A	mx1.tradelines.ru
77.73.89.18	PTR	mail.ertas.ru
77.73.89.26	A+PTR	sedo.southtel.ru
77.73.89.66	A	gw.mosflowline.ru
77.73.89.115	A+PTR	email.tvintos.ru
77.73.89.227	A	informdata.ru
77.73.89.228	A	informserp.ru
77.73.91.91	A+PTR	ns2.southtel.ru
77.73.91.138	A	okadv.ru
77.73.91.178	A+PTR	mail.ratep.ru