Robtex

Up: 12.15.160.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 12.15.160.0/25
Down right: 12.15.160.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
12.15.160.6	PTR	mail2.cleanharbors.com
12.15.160.18	A	cleanharbors.org
12.15.160.22	A+PTR	destiny-resources.com
12.15.160.22	A	mycleanharborswellness.com
12.15.160.22	A	www.cleanharbors.com
12.15.160.23	A	intranet.glbext.cleanharbors.com
12.15.160.23	A	intranet.cleanharbors.com
12.15.160.24	A	winweb.glbext.cleanharbors.com
12.15.160.24	A	winweb.cleanharbors.com
12.15.160.25	A+PTR	mail.cleanharbors.com
12.15.160.25	A+PTR	skmail.safety-kleen.com
12.15.160.25	A	mail2.pesl.com
12.15.160.26	A+PTR	dns1.cleanharbors.com
12.15.160.26	A	nebula.cleanharbors.com
12.15.160.26	A	ns1.cleanharbors.com
12.15.160.27	A+PTR	dns2.cleanharbors.com
12.15.160.27	A	ns2.cleanharbors.com
12.15.160.59	A	f5-gtm-corp.cleanharbors.com
12.15.160.66	A	mail2.cleanharbors.com
12.15.160.66	A	mail2.duratherm-intl.com
12.15.160.70	A+PTR	legacy.cleanharbors.com
12.15.160.71	PTR	legacy.cleanharbors.com
12.15.160.71	A+PTR	owa2010.cleanharbors.com
12.15.160.71	A	owa.cleanharbors.com
12.15.160.73	A+PTR	mgw.cleanharbors.com
12.15.160.84	A+PTR	lyncedgeaccess.safety-kleen.com
12.15.160.87	A+PTR	lyncedgeaccess.safety-kleen.com
12.15.160.92	A+PTR	owa.safety-kleen.com
12.15.160.92	A+PTR	mail.safety-kleen.com
12.15.160.109	A+PTR	www.mycleanharborsbenefits.com
12.15.160.109	A+PTR	mycleanharborsbenefits.com
12.15.160.109	A	cleanharborsbenefits.com
12.15.160.133	A+PTR	lyncedgeaccess.cleanharbors.com
12.15.160.136	A+PTR	lyncedgeaccess.cleanharbors.com
12.15.160.158	A+PTR	ofrinc.net
12.15.160.158	A+PTR	www.ofrinc.net
12.15.160.224	A	msmq2.cleanharbors.com
12.15.160.226	A+PTR	soti3.cleanharbors.com
12.15.160.241	A+PTR	smtp1.cleanharbors.com
12.15.160.242	A+PTR	smtp2.cleanharbors.com
12.15.160.243	A+PTR	smtp3.cleanharbors.com
12.15.160.244	A+PTR	smtp4.cleanharbors.com