Robtex

Up: 64.84.6.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 64.84.6.0/26
Down right: 64.84.6.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.84.6.0	PTR	0-6.84.64.ipost.com
64.84.6.1	PTR	1-6.84.64.ipost.com
64.84.6.2	A	imm02.ipost.com
64.84.6.4	PTR	mx.ipost.com
64.84.6.5	A+PTR	img.ipost.com
64.84.6.6	A	imm04.ipost.com
64.84.6.7	A	report.ipost.com
64.84.6.8	A+PTR	www01.ipost.com
64.84.6.9	A+PTR	www02.ipost.com
64.84.6.11	A+PTR	ns4.ipost.com
64.84.6.12	A	imm05.ipost.com
64.84.6.13	A	db03.ipost.com
64.84.6.14	A+PTR	cond01.ipost.com
64.84.6.14	A	db04.ipost.com
64.84.6.15	A	db05.ipost.com
64.84.6.16	A	db06.ipost.com
64.84.6.17	A	db07.ipost.com
64.84.6.19	A+PTR	db09.ipost.com
64.84.6.20	A	db10.ipost.com
64.84.6.21	A+PTR	mail11.ipost.com
64.84.6.22	A	mail12.ipost.com
64.84.6.23	A	mail13.ipost.com
64.84.6.24	A	mail14.ipost.com
64.84.6.25	A+PTR	mail15.ipost.com
64.84.6.26	A+PTR	mail16.ipost.com
64.84.6.27	A	mail17.ipost.com
64.84.6.28	A+PTR	mail18.ipost.com
64.84.6.29	A+PTR	mail09.ipost.com
64.84.6.30	A+PTR	mail0a.ipost.com
64.84.6.30	A	mail04.ipost.com
64.84.6.31	A	mail0b.ipost.com
64.84.6.32	A+PTR	mail0c.ipost.com
64.84.6.33	PTR	33-6.84.64.ipost.com
64.84.6.33	A	dns02.ipost.com
64.84.6.34	A	beta.ipost.com
64.84.6.35	A	imm03.ipost.com
64.84.6.36	A+PTR	imm.ipost.com
64.84.6.39	A	cond05.ipost.com
64.84.6.40	PTR	ipost.com
64.84.6.40	A	ip03.org
64.84.6.40	A	customer.usps.com
64.84.6.41	A	conduit.ipost.com
64.84.6.42	A+PTR	mx2.ipost.com
64.84.6.42	A	mx.g001.enterprise.ipost.com
64.84.6.42	A	mx.ipost.com
64.84.6.43	A+PTR	mx3.ipost.com
64.84.6.43	A	mx.g001.enterprise.ipost.com
64.84.6.43	A	mx.ipost.com
64.84.6.44	A+PTR	img01.ipost.com
64.84.6.45	A+PTR	www04.ipost.com
64.84.6.47	A+PTR	img02.ipost.com
64.84.6.48	A+PTR	pip.ipost.com
64.84.6.49	A+PTR	pip2.ipost.com
64.84.6.50	A+PTR	dns01.ipost.com
64.84.6.51	A	www05.ipost.com
64.84.6.52	A+PTR	mx4.ipost.com
64.84.6.52	A	mx.g001.enterprise.ipost.com
64.84.6.52	A	mx.ipost.com
64.84.6.53	A+PTR	www03.ipost.com
64.84.6.54	A+PTR	ftp.ipost.com
64.84.6.55	A+PTR	pip1.ipost.com
64.84.6.56	A	cond03.ipost.com
64.84.6.58	A+PTR	mx5.ipost.com
64.84.6.58	A	mx.g001.enterprise.ipost.com
64.84.6.58	A	mx.ipost.com
64.84.6.59	A	cond02.ipost.com
64.84.6.60	A+PTR	www.ipost.com
64.84.6.61	A+PTR	cond04.ipost.com
64.84.6.62	PTR	62-6.84.64.ipost.com
64.84.6.70	A	70-6.84.64.ipost.com
64.84.6.72	PTR	72-6.84.64.ipost.com
64.84.6.72	A	weboffersonline.com
64.84.6.72	A	e.iosappsettlement.com
64.84.6.74	A+PTR	74-6.84.64.ipost.com
64.84.6.75	A	75-6.84.64.ipost.com
64.84.6.80	PTR	pip80.ipost.com
64.84.6.81	A	pip81.ipost.com
64.84.6.86	A+PTR	pip86.ipost.com
64.84.6.92	A	pip92.ipost.com
64.84.6.100	A+PTR	pip100.ipost.com
64.84.6.122	A+PTR	pip122.ipost.com
64.84.6.123	A	pip123.ipost.com