Robtex

Up: 66.128.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 66.128.192.0/21
Down right: 66.128.200.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.128.192.42	PTR	66-128-192-42.rev.intercomonline.com
66.128.192.96	PTR	66-128-192-96.rev.intercom.com
66.128.192.125	A	66-128-192-125.rev.intercom.com
66.128.192.179	PTR	66-128-192-179.rev.intercom.com
66.128.193.101	PTR	66-128-193-101.rev.intercomonline.com
66.128.194.14	PTR	66-128-194-14.rev.intercom.com
66.128.194.38	PTR	66-128-194-38.rev.intercom.com
66.128.194.100	A	66-128-194-100.rev.intercom.com
66.128.194.112	PTR	66-128-194-112.rev.intercomonline.com
66.128.195.74	PTR	66-128-195-74.rev.intercomonline.com
66.128.196.34	PTR	66-128-196-34.rev.intercom.com
66.128.196.95	PTR	66-128-196-95.rev.intercomonline.com
66.128.197.136	PTR	66-128-197-136.rev.intercomonline.com
66.128.197.137	PTR	66-128-197-137.rev.intercomonline.com
66.128.197.232	PTR	cosmopolitanusa.com
66.128.197.233	PTR	cosmopolitanusa.com
66.128.199.50	A	mail.therapyforbetterliving.com
66.128.199.60	PTR	66-128-199-60.rev.intercomonline.com
66.128.200.69	PTR	66-128-200-69.rev.intercom.com
66.128.207.10	A	dns1.inyc.com
66.128.207.12	A	dns2.inyc.com
66.128.207.12	A	66-128-207-12.rev.intercom.com
66.128.207.12	A	ns1.inyc.com
66.128.207.16	A	noc.inyc.com
66.128.207.20	A	nas1.inyc.com
66.128.207.22	A	raq4.inyc.com
66.128.207.27	A	linux6.inyc.com
66.128.207.32	A+PTR	cyber2.medikin.com
66.128.207.33	A	cyber3.medikin.com
66.128.207.34	A	cyber4.medikin.com
66.128.207.35	A	cyber5.medikin.com
66.128.207.56	A	chuck-close.com
66.128.207.56	A	www.chuck-close.com
66.128.207.56	A	gccserv.com
66.128.207.66	A+PTR	raq1.inyc.com
66.128.207.67	A	raq2.inyc.com
66.128.207.68	A	raq3.inyc.com
66.128.207.69	A	mail.cucumberco.com
66.128.207.87	A	mail.lateliernyc.com
66.128.207.87	A	zimbra2.intercom.com
66.128.207.87	A	mail.rivieraparfums.com
66.128.207.122	A	zimbrarelay.intercomonline.com
66.128.207.131	PTR	66-128-207-131.rev.intercom.com
66.128.207.131	A	ecomall.com
66.128.207.156	A	dev1.medikin.com
66.128.207.186	A	stiletto.medikin.com
66.128.207.188	A	storage1.medikin.com
66.128.207.190	A	storage2.medikin.com
66.128.207.194	PTR	66-128-207-194.rev.intercom.com
66.128.207.194	A	web1.medikin.com
66.128.207.204	A	intercomonline.com
66.128.207.205	A	smtp.medikin.com