Robtex

Up: 81.222.228.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.222.228.0/25
Down right: 81.222.228.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.222.228.10	A+PTR	mail.maxcomm.spb.ru
81.222.228.10	A	mail.bronko.ru
81.222.228.10	A	mail.tek-spb.ru
81.222.228.26	A	mail.info-bronko.ru
81.222.228.34	A	nevaprimecoat.com
81.222.228.34	A	nevaprimedoor.com
81.222.228.43	A+PTR	mail.alitet.com