Robtex

Up: 77.91.66.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 77.91.67.0/25
Down right: 77.91.67.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.91.67.3	A+PTR	ns2.prime-line.ru
77.91.67.25	PTR	beta.prime-line.ru
77.91.67.34	A+PTR	cl1.prime-line.ru
77.91.67.34	A	mail.fotontel.ru
77.91.67.34	A	mail.prime-line.ru
77.91.67.54	PTR	cl2.prime-line.ru