Robtex

Up: 198.168.30.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 198.168.31.0/25
Down right: 198.168.31.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
198.168.31.2	PTR	firewall-markley.corpitsol.com
198.168.31.26	A+PTR	ironport2.corpitsol.com
198.168.31.26	A	smtp2.corpitsol.com
198.168.31.31	A	www.corpitsol.com
198.168.31.31	A	nable.thrivenetworks.com
198.168.31.40	A+PTR	managed.corpitsol.com
198.168.31.45	A+PTR	mail13.corpitsol.com
198.168.31.45	A	mail.corpitsol.com
198.168.31.54	PTR	198.168.31.54.corpitsol.com
198.168.31.54	A	mail.imsearch.com
198.168.31.54	A	autodiscover.imsearch.com
198.168.31.55	PTR	198.168.31.55.corpitsol.com
198.168.31.55	A	celent.com
198.168.31.58	A	mail.aerovox.com
198.168.31.67	A	ftp.tfccs.com
198.168.31.72	PTR	nwh.org.supportcard.com
198.168.31.72	A	rigellearning.com
198.168.31.75	A	mail.lexpeds.com
198.168.31.77	PTR	198.168.31.77.corpitsol.com
198.168.31.77	A	mail.nrtbus.com
198.168.31.79	A	mytwhtraining.com
198.168.31.79	A	mytevalearning.com
198.168.31.80	A	mytrtraining.com
198.168.31.81	PTR	198.168.31.81.corpitsol.com
198.168.31.81	A	mytbsptraining.com
198.168.31.82	A	chiesiusaacademy.com
198.168.31.83	PTR	198.168.31.83.corpitsol.com
198.168.31.83	A	chiesiusaacademy.com
198.168.31.87	A	mail.sk-assoc.com
198.168.31.87	A	sk-assoc.com
198.168.31.88	PTR	198.168.31.88.corpitsol.com
198.168.31.88	A	lpiclientportal.com
198.168.31.107	PTR	198.168.31.107.corpitsol.com
198.168.31.107	A	cspsns2.csps.com
198.168.31.111	A+PTR	oechslemail.com
198.168.31.111	A	mail.oechsle.com
198.168.31.135	PTR	198.168.31.135.corpitsol.com
198.168.31.135	A	cfgsupplier.com
198.168.31.164	PTR	198.168.31.164.corpitsol.com
198.168.31.164	A	mail.edukgroup.com
198.168.31.166	A	myportalftc.edukgroup.com
198.168.31.168	PTR	198.168.31.168.corpitsol.com
198.168.31.168	A	webmail.edukgroup.com
198.168.31.168	A	autodiscover.edukgroup.com
198.168.31.180	A	smtp.renaissanceins.com
198.168.31.181	PTR	198.168.31.181.corpitsol.com
198.168.31.181	A	antispam01.renaissanceins.com
198.168.31.192	A	mail.jtcco.com
198.168.31.209	A	mail.acipuertorico.com
198.168.31.210	A	mail.mbcr.net
198.168.31.219	PTR	198.168.31.219.corpitsol.com
198.168.31.219	A	www.otonomyuniversity.com
198.168.31.238	A	mail.chasecorp.com
198.168.31.246	PTR	198.168.31.246.corpitsol.com
198.168.31.246	A	mail.avdesigns.com
198.168.31.249	A	ardlearning.com
198.168.31.249	A	csoftusa.com
198.168.31.249	A	depomeduniversity.com