Robtex

Up: 166.84.0.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 166.84.1.0/25
Down right: 166.84.1.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
166.84.1.1	A+PTR	panix1.panix.com
166.84.1.1	A	panix.com
166.84.1.1	A	panix.net
166.84.1.2	A+PTR	panix2.panix.com
166.84.1.2	A	panix.com
166.84.1.2	A	panix.net
166.84.1.3	A+PTR	panix3.panix.com
166.84.1.3	A	panix.com
166.84.1.3	A	panix.net
166.84.1.4	A+PTR	panix4.panix.com
166.84.1.5	A+PTR	panix5.panix.com
166.84.1.6	A+PTR	panix6.panix.com
166.84.1.11	A	panix1-ssh.panix.com
166.84.1.12	A+PTR	panix2-ssh.panix.com
166.84.1.16	A	trantor2-1.panix.com
166.84.1.18	A+PTR	zed-2.panix.com
166.84.1.21	A+PTR	www1.panix.com
166.84.1.21	A	heronfinancialgroup.us
166.84.1.22	A+PTR	www2.panix.com
166.84.1.23	A	farley-2.panix.com
166.84.1.24	PTR	shwebfs.panix.com
166.84.1.25	A	postoffice-2.panix.com
166.84.1.26	A	squid1.nyc.access.net
166.84.1.27	A	trantor-1.panix.com
166.84.1.54	PTR	eth2-6.core1.nav.nyc.access.net
166.84.1.66	PTR	ns0.access.net
166.84.1.66	A	thorax.panix.com
166.84.1.69	A	reader1.panix.com
166.84.1.70	A+PTR	reader2.panix.com
166.84.1.71	PTR	mysql2.panix.com
166.84.1.71	A	thorax-2.panix.com
166.84.1.72	A+PTR	mail1.panix.com
166.84.1.72	A	mailhost.access.net
166.84.1.72	A	mx.panix.com
166.84.1.73	A+PTR	mail2.panix.com
166.84.1.73	A	mailhost.access.net
166.84.1.73	A	mx.panix.com
166.84.1.74	A+PTR	mail3.panix.com
166.84.1.74	A	mailhost.access.net
166.84.1.75	A+PTR	l2mail1.panix.com
166.84.1.75	A	mailhost-l2.panix.com
166.84.1.75	A	mailhost-l2.access.net
166.84.1.77	A+PTR	femail.panix.com
166.84.1.78	A+PTR	mailbackend2.panix.com
166.84.1.84	A	mailcrunch3.panix.com
166.84.1.85	A+PTR	mailcrunch2.panix.com
166.84.1.86	A	mailcrunch1.panix.com
166.84.1.87	A	mailproc1.panix.com
166.84.1.88	PTR	mysql1.panix.com
166.84.1.88	A	zed.panix.com
166.84.1.89	A+PTR	mailbackend.panix.com
166.84.1.89	A	mailspool2.panix.com
166.84.1.89	A	mail.access.net
166.84.1.90	A+PTR	femailbackend.panix.com
166.84.1.91	PTR	roundcube.panix.com
166.84.1.91	A	postoffice.panix.com
166.84.1.92	PTR	femailtest.panix.com
166.84.1.92	A	farley.panix.com
166.84.1.107	PTR	annex10.nyc.access.net
166.84.1.107	A	femailtest.panix.com
166.84.1.146	A	tanelorn.nyc.access.net
166.84.1.157	A	shylock.nyc.access.net
166.84.1.166	A	axis1.nyc.access.net
166.84.1.197	A+PTR	panix4.panix.com
166.84.1.198	A+PTR	nas.panix.com
166.84.1.212	A+PTR	octagon.nyc.access.net
166.84.1.252	A+PTR	trinity.nyc.access.net
166.84.1.253	A	juggler.panix.com