Robtex

Up: 206.46.232.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 206.46.232.0/23
Down right: 206.46.234.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
206.46.232.9	PTR	netmail.verizon.net
206.46.232.10	PTR	incoming.verizon.net
206.46.232.10	A	mail.wvhomesrus.com
206.46.232.10	A	impop.bellatlantic.net
206.46.232.11	A+PTR	relay.verizon.net
206.46.232.12	PTR	outgoing.verizon.net
206.46.232.12	A	outgoing.konst.co.uk
206.46.232.12	A	outgoing.west.verizon.net
206.46.232.15	PTR	mail.verizon.com
206.46.232.16	A+PTR	abxml.west.verizon.net
206.46.232.17	PTR	netmail.verizon.com
206.46.232.17	A	viewonly.webmail.verizon.net
206.46.232.18	A+PTR	imap.bizmailsrvcs.net
206.46.232.18	A	imap.managedmail.com
206.46.232.19	PTR	webmail.managedmail.com
206.46.232.20	PTR	pop.bizmailsrvcs.net
206.46.232.20	A	popssl.verizonemail.net
206.46.232.20	A	lelinc.com.2.arsmtp.com
206.46.232.22	PTR	smtp.bizmailsrvcs.net
206.46.232.23	PTR	imap.verizon.net
206.46.232.24	PTR	mta1.bizmailsrvcs.net
206.46.232.24	A+PTR	mta2.bizmailsrvcs.net
206.46.232.24	A	mail.lescofcu.com
206.46.232.25	PTR	relay.gms.verizon.net
206.46.232.26	PTR	intermanager.managedmail.com
206.46.232.39	A+PTR	ping.verizon.net
206.46.232.42	A	origin-business.verizon.net
206.46.232.43	A+PTR	csp.verizon.net
206.46.232.44	A	sitebuilder.verizon.net
206.46.232.44	A	members.bellatlantic.net
206.46.232.44	A	netservices.verizon.net
206.46.232.45	PTR	activatemywifi.verizon.net
206.46.232.46	PTR	activatemyhsi.verizon.net
206.46.232.49	PTR	activate.verizon.net
206.46.232.50	A	auth.verizon.com
206.46.232.51	A+PTR	dslreg.verizon.net
206.46.232.52	PTR	dslreg.bellatlantic.net
206.46.232.54	A+PTR	sfp.verizon.net
206.46.232.55	PTR	activatemydsl.verizon.net
206.46.232.55	A	dslping1.verizon.net
206.46.232.56	PTR	activatemyfios.verizon.net
206.46.232.57	A	auth.verizon.net
206.46.232.58	A	downloadmanager.verizon.net
206.46.232.68	PTR	rbl1.west.verizon.net
206.46.232.69	PTR	rbl2.west.verizon.net
206.46.232.71	PTR	webmail.ncnetwork.net
206.46.232.100	PTR	smtp.verizon.net
206.46.232.132	PTR	pop.verizon.net
206.46.232.195	A	signin.verizon.com
206.46.232.206	A	email.verizon.net
206.46.232.206	A	potentialofus.com
206.46.232.206	A	dsllive.verizon.net
206.46.232.208	A	syndicate.verizon.net
206.46.232.210	A	dcshm.verizon.net
206.46.232.211	A	ucdownload.verizon.com
206.46.232.211	A	wbadownload.verizon.net
206.46.232.213	A	dins.verizon.net
206.46.232.214	A	rtdcshm.verizon.net
206.46.232.218	A	www2.verizon.net
206.46.234.151	A	cpe-ems20.verizon.com
206.46.234.152	A	cpe-emsv300.verizon.com
206.46.234.158	A	cpe-ems2211.verizon.com
206.46.234.175	A	cpe-ems0271.verizon.com
206.46.234.177	A	cpe-ems2271.verizon.com
206.46.234.196	A	cpe-ems30.verizon.com
206.46.234.203	A	cpe-ems121.verizon.com
206.46.234.213	A	cpe-ems1214.verizon.com
206.46.234.226	A	cpe-ems1334.verizon.com
206.46.234.229	A	cpe-ems2334.verizon.com
206.46.234.230	A	cpe-ems2335.verizon.com
206.46.234.232	A	cpe-ems2341.verizon.com
206.46.234.234	A	cpe-ems2343.verizon.com
206.46.234.242	A	cpe-ems9123.verizon.com