Robtex

Up: 69.48.156.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 69.48.156.0/24
Down right: 69.48.157.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
69.48.156.1	A+PTR	atg-gw.atgnet.com
69.48.156.5	A+PTR	dns0.atgnet.com
69.48.156.5	A	atg1.atgnet.com
69.48.156.5	A	proxy3.atgnet.com
69.48.156.6	A+PTR	dns1.atgnet.com
69.48.156.6	A	atg20.atgnet.com
69.48.156.6	A	atg2.atgnet.com
69.48.156.7	A	dns2.atgnet.com
69.48.156.8	A+PTR	atg3.atgnet.com
69.48.156.9	A+PTR	atg4.atgnet.com
69.48.156.10	A+PTR	w3.atgnet.com
69.48.156.10	A	krinos.com
69.48.156.10	A	erbrothers.org
69.48.156.11	PTR	w1.atgnet.com
69.48.156.14	PTR	www.atgnet.com
69.48.156.16	A	w2.atgnet.com
69.48.156.17	A	exchangehost.atgnet.com
69.48.156.20	PTR	atg2.atgnet.com
69.48.156.24	A+PTR	dnss3.atgnet.com
69.48.156.27	A+PTR	jl1.atgnet.com
69.48.156.28	A+PTR	ts.atgnet.com
69.48.156.28	A	trackstatedollars.org
69.48.156.29	A+PTR	mdl.ursuline.pvt.k12.ny.us
69.48.156.30	A	mail.prosafetyllc.com
69.48.156.30	A	atg-drso.atgnet.com
69.48.156.31	A+PTR	spamb1.atgnet.com
69.48.156.31	A	spamb0.atgnet.com
69.48.156.33	A+PTR	atg-ber.atgnet.com
69.48.156.34	A+PTR	st34.atgnet.com
69.48.156.35	A+PTR	atg-dam.atgnet.com
69.48.156.36	A	helpdesk.atgnet.com
69.48.156.40	A+PTR	mailhost.atgnet.com
69.48.156.40	A	proxy2.atgnet.com
69.48.156.40	A	mail.atgnet.com
69.48.156.43	A+PTR	osueast.org
69.48.156.44	A+PTR	dmz0.atgnet.com
69.48.156.45	PTR	fssy.org
69.48.156.46	A+PTR	auroyaumedesaveugles.com
69.48.156.46	A	www.auroyaumedesaveugles.com
69.48.156.46	A	mail.auroyaumedesaveugles.com
69.48.156.48	PTR	trafcom.com
69.48.156.53	A	ipcourseware.ionaprep.org
69.48.156.63	A+PTR	thora.atgnet.com
69.48.156.63	A	erbrothers.org
69.48.156.63	A	cfcvocations.org
69.48.156.65	A	wc.atgnet.com
69.48.156.65	A	antispam.pcsolutions.gr
69.48.156.70	A	exchange.atgnet.com
69.48.156.72	PTR	ex1.hq.atgnet.com
69.48.156.72	A	sjwp.sjcadets.org
69.48.156.85	A	cbr.atgnet.com
69.48.156.101	A+PTR	of1.atgnet.com
69.48.156.102	A	btiofny.atgnet.com
69.48.156.103	A+PTR	obs1.atgnet.com
69.48.156.106	A+PTR	adarc.atgnet.com
69.48.156.120	A	dialup120.atgnet.com
69.48.156.121	A+PTR	dialup121.atgnet.com
69.48.156.122	A+PTR	dialup122.atgnet.com
69.48.156.123	A+PTR	dialup123.atgnet.com
69.48.156.254	A	atg-gw2.atgnet.com
69.48.156.255	A	atg-gw1.atgnet.com
69.48.157.70	A	saveonpurchase.com