Robtex

Up: 209.163.104.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 209.163.108.0/23
Down right: 209.163.110.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
209.163.108.7	A+PTR	nyc-amtrak-cisco-5850-7.coretel.net
209.163.108.34	PTR	freedman.net
209.163.108.34	A	mx10.vxcon.com
209.163.108.34	A	balt1.freedman.net
209.163.108.35	A+PTR	balt2.freedman.net
209.163.108.50	A	philvoice1.coretel.net
209.163.108.51	A	philvoice2.coretel.net
209.163.108.52	A	philfaxgw.coretel.net
209.163.108.53	A+PTR	philfaxsrv1.coretel.net
209.163.108.54	A	dragnet2.coretel.net
209.163.108.56	A	ser5.coretel.net
209.163.108.66	A	voicemon.coretel.net
209.163.108.67	A+PTR	ns1.coretel.net
209.163.108.76	A+PTR	opus.coretel.net
209.163.108.77	A+PTR	akira.coretel.net
209.163.108.78	A+PTR	ns3.coretel.net
209.163.108.79	A	apu.coretel.net
209.163.108.80	A	modems.coretel.net
209.163.108.84	A	apcpwrstrip2.coretel.net
209.163.108.86	A	trunkmon.coretel.net
209.163.108.89	A+PTR	midi.coretel.net
209.163.108.91	A+PTR	voicemon01.coretel.net
209.163.108.91	A	mail.rccconsultants.net
209.163.108.96	A+PTR	pinky.coretel.net
209.163.108.97	A	pebbles.coretel.net
209.163.108.97	A	logger.coretel.net
209.163.108.100	A+PTR	web.coretel.net
209.163.108.100	A	coretel.net
209.163.108.100	A	suitcasingconference.com
209.163.108.148	A	zazu.coretel.net
209.163.108.149	A	ns10.coretel.net
209.163.108.162	A+PTR	fs1.coretel.net
209.163.108.165	A+PTR	noc.coretel.net
209.163.108.178	A	200e-sw01-c3508.coretel.net
209.163.108.179	A	200e-sw01-c3548.coretel.net
209.163.108.180	A	200e-sw02-c3548.coretel.net
209.163.108.181	A	200e-sw03-c3548.coretel.net
209.163.108.182	A	200e-sw04-c3548.coretel.net
209.163.108.194	A	techcenterlan-scott-194.coretel.net
209.163.109.5	A+PTR	devapi.coretel.net
209.163.109.6	A	testvoip.coretel.net
209.163.109.6	A	test3.coretel.net
209.163.109.7	A	voice1.coretel.net
209.163.109.10	A	vig.coretel.net
209.163.109.13	A+PTR	sipsrv1.coretel.net
209.163.109.16	A+PTR	devser.coretel.net
209.163.109.17	A+PTR	devvo.coretel.net
209.163.109.29	A	ser3.coretel.net
209.163.109.30	A+PTR	ser4.coretel.net
209.163.109.32	A	tester.coretel.net
209.163.109.148	PTR	balt-ixc-209-163-109-148.dynamic-dialup.coretel.net
209.163.109.168	A	balt-209-163-109-168.acsworld-dynamic.coretel.net
209.163.109.186	A	blt-max1.coretel.net
209.163.109.200	A+PTR	mail.coretel.net
209.163.109.231	PTR	fb1.coretel.net
209.163.109.238	A+PTR	fs-cdr01.coretel.net