Robtex

Up: 77.78.30.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 77.78.31.0/25
Down right: 77.78.31.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.78.31.3	A+PTR	regiware.com
77.78.31.3	A	mail.magazinite.com
77.78.31.3	A	mail.metavak.com
77.78.31.7	A	deant.bit-bg.com
77.78.31.13	A	mail.technoart.bg
77.78.31.13	A	technoart.bg
77.78.31.13	A	ns2.technoart.bg
77.78.31.22	A	pristainvest.com
77.78.31.22	A	www.pristainvest.com
77.78.31.166	A	ns.imedia-dev.com
77.78.31.166	A	imedia-dev.com
77.78.31.178	PTR	borisova63-unl-ip178.networx-bg.com