Robtex

Up: 72.20.140.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 72.20.141.0/25
Down right: 72.20.141.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.20.141.22	A	mail.pmoseley.com
72.20.141.36	PTR	vsa.txgrp.com
72.20.141.38	PTR	titan.txgrp.com
72.20.141.44	A+PTR	tritechtx.com
72.20.141.44	PTR	mail.tritechtx.com
72.20.141.45	A	mail.tritechtx.com
72.20.141.45	A	mail.tri-tech-surveying.com
72.20.141.52	A+PTR	pixjobit.phonoscope.com
72.20.141.80	A+PTR	mail.lpisd.org
72.20.141.80	PTR	mail.laporte.isd.esc4.net
72.20.141.85	A	ftp.lpisd.org
72.20.141.94	A	igprojh.lpisd.org
72.20.141.164	A	gw.mfah.org
72.20.141.165	PTR	mail.mfah.org
72.20.141.165	A	static.mfah.com
72.20.141.165	A	mfah.org
72.20.141.166	A+PTR	acd.mfah.org
72.20.141.167	A+PTR	optin.mfah.org
72.20.141.172	A	core.mfah.org
72.20.141.173	A+PTR	smtp.mfah.org
72.20.141.176	A	icaadocs.mfah.org
72.20.141.179	A	twa.mfah.org
72.20.141.180	A	flohouston.com
72.20.141.182	A	email.mfah.org
72.20.141.210	PTR	mail.deltasteel.com
72.20.141.211	A+PTR	mail.deltasteel.com
72.20.141.212	A	ftp.deltasteel.com