Robtex

Up: 199.87.0.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 199.87.0.0/22
Down right: 199.87.4.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.87.0.31	A	mail2.rsfh.com
199.87.0.31	A	mail2.rsfh.org
199.87.0.31	A	mail2.ropersaintfrancis.org
199.87.0.43	A	mail.ropersaintfrancis.com
199.87.0.43	A	mail.rsfh.com
199.87.0.56	PTR	mail-in.ropersaintfrancis.com
199.87.0.56	A	mail-in.carealliance.com
199.87.0.56	A	mail-in.ropersaintfrancis.org
199.87.0.121	A	charleston-neurosurgery.net
199.87.0.121	A	rsfhealthalliance.com
199.87.0.121	A	coastalwomenswellness.net
199.87.0.135	A	rsfhdev.com
199.87.1.15	A	spamfilter.pct.edu
199.87.1.21	A	pct.edu
199.87.1.46	A	ftp.pct.edu
199.87.2.30	A	sleepmanagementsolutions.org
199.87.2.70	A	smtp1.carecentrix.com
199.87.2.71	A	smtp2.carecentrix.com
199.87.2.90	A	wvpeiasleep.com
199.87.2.225	A	mobile.carecentrix.com
199.87.2.228	A	www.carecentrixportal.com
199.87.2.228	A	carecentrixonline.com
199.87.2.249	A	transapp.carecentrix.com
199.87.3.68	A	securemail.carecentrix.com
199.87.3.72	A+PTR	smtp.carecentrix.com
199.87.3.74	A+PTR	pppa001.carecentrix.com
199.87.3.75	A+PTR	pppa002.carecentrix.com
199.87.3.109	A	sleepum.com