Robtex

Up: 91.83.152.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 91.83.156.0/23
Down right: 91.83.158.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.83.156.0	PTR	91.83.156.0.pool.invitel.hu
91.83.156.22	A+PTR	91.83.156.22.pool.invitel.hu
91.83.156.70	A	91.83.156.70.pool.invitel.hu
91.83.156.71	A	91.83.156.71.pool.invitel.hu
91.83.156.84	A	91.83.156.84.pool.invitel.hu
91.83.156.180	A	91.83.156.180.pool.invitel.hu
91.83.156.226	A	91.83.156.226.pool.invitel.hu
91.83.156.255	PTR	91.83.156.255.pool.invitel.hu
91.83.157.2	A+PTR	mail.szalmanet.com
91.83.157.2	A	portal.szalmanet.com
91.83.157.2	A	szalmanet.com
91.83.157.3	PTR	tv.szalmanet.com
91.83.157.5	A	voice.szalmanet.com
91.83.157.10	A+PTR	mail.nitro.hu
91.83.157.11	A	nitro.hu
91.83.157.34	A	hphvpn.hph.hu
91.83.157.37	A	qaws.hph.hu
91.83.157.37	A	ws.bellis.hu
91.83.157.37	A	ws.hph.hu
91.83.157.40	A	levelek.hph.hu
91.83.157.41	A	www.hungaropharma.hu
91.83.157.42	A+PTR	mail2.hungaropharma.hu
91.83.157.42	A	mail2.hph.hu
91.83.157.50	A+PTR	mail.speedtech.hu
91.83.157.86	A+PTR	mail.bishungary.hu
91.83.157.166	PTR	mail.mavfkgjk.hu
91.83.157.178	PTR	mail.borsonline.hu
91.83.157.179	PTR	mail.borsonline.hu
91.83.157.179	A	mail.drazse.net
91.83.157.179	A	mail.szbl.hu
91.83.157.180	A	firewall.bpsun.hu
91.83.157.194	A+PTR	uag.malev.hu
91.83.157.196	A	da.malev.hu
91.83.157.244	A	pkorhaz.hu