Robtex

Up: 80.254.18.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 80.254.19.0/25
Down right: 80.254.19.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.254.19.2	A+PTR	mail.avtsev.spb.ru
80.254.19.62	PTR	mail.bengs.ru
80.254.19.62	A	vqr.ca
80.254.19.62	A	mail.step-company.ru
80.254.19.186	PTR	mastergambs.19.piter-telecom.ru
80.254.19.227	PTR	balthleb1.piter-telecom.ru