Robtex

Up: 217.145.160.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 217.145.161.0/25
Down right: 217.145.161.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.145.161.2	A+PTR	mnf.is-bg.net
217.145.161.3	PTR	mail.is-bg.net
217.145.161.3	A	is-bg.eu
217.145.161.6	A+PTR	mrtg.is-bg.net
217.145.161.8	A+PTR	obsc.is-bg.net
217.145.161.8	A	obs.is-bg.net
217.145.161.12	PTR	rezultati.is-bg.net
217.145.161.12	A	mail5.is-bg.net
217.145.161.12	A	izbori2005.is-bg.net
217.145.161.13	A+PTR	mail4.is-bg.net
217.145.161.13	A	izbori.is-bg.net
217.145.161.13	A	hosting.is-bg.net
217.145.161.14	PTR	mail5.is-bg.net
217.145.161.21	A	real.is-bg.net
217.145.161.22	PTR	elfi2.is-bg.net
217.145.161.27	A+PTR	delfin.is-bg.net
217.145.161.35	A	ns2.egvrn.net
217.145.161.35	A	web1.comm.is-bg.net
217.145.161.35	A	ns.egvrn.net
217.145.161.36	A+PTR	ns4.is-bg.net
217.145.161.36	A	rns1.is-bg.net
217.145.161.36	A	ns1.comm.is-bg.net
217.145.161.37	A+PTR	ns2.is-bg.net
217.145.161.38	A+PTR	mail2.is-bg.net
217.145.161.39	A+PTR	mail3.is-bg.net
217.145.161.39	A	dc-18922f94-mail.cik.bg
217.145.161.39	A	mail.is-bg.net
217.145.161.40	A	mail5.is-bg.net
217.145.161.40	A	mail4.is-bg.net
217.145.161.40	A	mailf.is-bg.net
217.145.161.66	A+PTR	hosting3.is-bg.net
217.145.161.84	A	iso9001.is-bg.net
217.145.161.100	PTR	mail.is-bg.org
217.145.161.102	A+PTR	cec.is-bg.net
217.145.161.103	A	monitor.is-bg.net
217.145.161.200	A+PTR	old.is-bg.net
217.145.161.200	A	izbori2003.is-bg.net
217.145.161.253	A	mailf.is-bg.net