Robtex

Up: 199.44.166.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 199.44.167.0/25
Down right: 199.44.167.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.44.167.5	A+PTR	linuxns1.mainline.com
199.44.167.9	PTR	mps.s390.mainline.com
199.44.167.13	PTR	webcast.mainline.com
199.44.167.21	PTR	misdev.mainline.com
199.44.167.31	A+PTR	contractor.mainline.com
199.44.167.31	PTR	missub.mainline.com
199.44.167.34	A+PTR	tssc-expert.mainline.com
199.44.167.38	A	socialtraveler.net
199.44.167.39	A+PTR	webhosting.mainline.com
199.44.167.39	A	mainline.jobs
199.44.167.39	A	softwarebydesign.com
199.44.167.40	PTR	webhosting.summiteast.com
199.44.167.40	A	staybridgetlh.com
199.44.167.40	A	casareserva.net
199.44.167.41	PTR	bpic-network.mainline.com
199.44.167.48	A+PTR	mx3.mainline.com
199.44.167.49	PTR	mistest.mainline.com
199.44.167.50	A+PTR	mx4.mainline.com
199.44.167.51	A+PTR	linuxns3.mainline.com
199.44.167.56	PTR	mysqlprod.mainline.com
199.44.167.58	PTR	mysqltest.mainline.com
199.44.167.60	PTR	zimbra.mainline.com
199.44.167.60	A	nanopaper.org
199.44.167.60	A	tulemarbungalow.com
199.44.167.68	PTR	ftp.s390.mainline.com
199.44.167.68	A+PTR	sles001.s390.mainline.com
199.44.167.83	PTR	vspherevcenter.mainline.com
199.44.167.86	A+PTR	fds.mainline.com
199.44.167.91	PTR	medco.mainline.com
199.44.167.100	PTR	ut-mis2sb.mainline.com
199.44.167.111	A+PTR	mx1.mainline.com
199.44.167.113	PTR	replication.mainline.com
199.44.167.114	A	traveler-backend1.mainline.com
199.44.167.178	A	ns2.gaetech.com
199.44.167.178	A	ns1.tat.mainline.com
199.44.167.185	PTR	ns1.tat.mainline.com
199.44.167.250	PTR	tallahassee.mainline.com
199.44.167.253	PTR	mainline.com