Robtex

Up: 199.73.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 199.73.84.0/23
Down right: 199.73.86.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.73.84.0	PTR	199-73-84-0.globalinxcall.com
199.73.84.4	PTR	aps.glvoipcall.com
199.73.84.4	A	prov1.globalinx.com
199.73.84.19	PTR	globalinxspeedtest.com
199.73.84.28	PTR	199-73-84-28.globalinxcall.com
199.73.84.28	A	video.5linx.com
199.73.84.132	A+PTR	msg01-nyc.globalinxcall.com
199.73.84.132	A	ns1.globalinxcall.com
199.73.84.132	A	mx.glvoipcall.com
199.73.84.136	A+PTR	sbc.nyc.globalinxcall.com
199.73.84.136	A	globalinxcall.com
199.73.84.136	A	nyc.globalinxcall.com
199.73.84.137	A+PTR	portal01.globalinxcall.com
199.73.84.147	PTR	sbc.nyc.glvoipcall.com
199.73.84.147	A	glvoipcall.com
199.73.84.151	A+PTR	portal01.glvoipcall.com
199.73.84.153	A	aps.glvoipcall.com
199.73.84.157	A	aps.globalinxcall.com
199.73.84.231	A+PTR	dns01.nyc.glvoipcall.com
199.73.84.231	A	dns01.nyc.globalinxcall.com
199.73.85.3	PTR	199-73-85-3.globalinxcall.com
199.73.85.4	PTR	199-73-85-4.globalinxcall.com
199.73.85.4	A	navigator.cimco.net
199.73.85.7	PTR	199-73-85-7.globalinxcall.com
199.73.85.7	A	webportal.nexxtpbx.com
199.73.85.7	A	webportal.pbx.net
199.73.85.132	A+PTR	msg01-atl.globalinxcall.com
199.73.85.132	A	mx.glvoipcall.com
199.73.85.132	A	ntp.globalinxcall.com
199.73.85.136	A+PTR	sbc.atl.globalinxcall.com
199.73.85.136	A	atl.globalinxcall.com
199.73.85.137	A+PTR	portal02.globalinxcall.com
199.73.85.148	A+PTR	iptrunk.atl.glvoipcall.com
199.73.85.153	A	aps.glvoipcall.com
199.73.85.157	A	aps.globalinxcall.com
199.73.85.229	A+PTR	dns01.atl.glvoipcall.com
199.73.85.229	A	dns01.atl.globalinxcall.com
199.73.86.54	PTR	199-73-86-54.5linx.com
199.73.86.132	A+PTR	vpn.5linx.com
199.73.86.139	A+PTR	mail.5linx.com
199.73.86.142	PTR	mail.5linx.com
199.73.86.143	PTR	mail.5linx.com
199.73.86.144	PTR	mail.5linx.com
199.73.86.151	PTR	199-73-86-151.5linx.com
199.73.86.151	A	mail.5linx.com
199.73.86.151	A	mail2.5linx.com
199.73.86.201	PTR	201.86.73.199.5linx.com
199.73.86.201	A	glvoiplab.com
199.73.86.205	PTR	205.86.73.199.5linx.com
199.73.86.205	A	globalinxlab.com
199.73.86.230	PTR	msg01.pri.globalinxlab.com
199.73.86.244	A+PTR	prov1a.globalinxlab.com
199.73.87.1	A+PTR	rtr01-hsrp.roc0201.ny.5linx.com
199.73.87.11	A+PTR	pool.5linx.com
199.73.87.12	PTR	mail.5linx.net
199.73.87.14	PTR	199-73-87-14.5linx.com
199.73.87.21	PTR	21.87.73.199.5linx.com
199.73.87.25	PTR	reporting.5linx.com
199.73.87.25	A	199-73-87-75.5linx.com
199.73.87.25	A	*.htmlhtmlmx1.5linx.com
199.73.87.26	PTR	mail-relay.globalinx.com
199.73.87.27	PTR	test-vip.5linx.com
199.73.87.29	PTR	29.87.73.199.5linx.com
199.73.87.29	A	teevee.tv
199.73.87.29	A	www.teevee.tv
199.73.87.30	A+PTR	ns3.globalinx.com
199.73.87.30	A	ns3.5linx.com
199.73.87.31	PTR	ns4.globalinx.com
199.73.87.34	PTR	34.87.73.199.5linx.com
199.73.87.34	A	comwww.fivelinx.ca
199.73.87.34	A	*.fivelinx.ca
199.73.87.37	PTR	199-73-87-37.5linx.com
199.73.87.38	A	www.chromacreditrestoration.com
199.73.87.39	PTR	39.87.73.199.5linx.com
199.73.87.39	A	vo.5linx.com
199.73.87.39	A	5linx.net
199.73.87.40	PTR	199-73-87-40.5linx.com
199.73.87.40	A	5linxwellness.com
199.73.87.41	PTR	199-73-87-41.5linx.com
199.73.87.42	A	pittsburghenergyprofits.com
199.73.87.42	A	buffaloenergyprofits.com
199.73.87.42	A	register.5linx.com
199.73.87.43	PTR	mx1.5linx.com
199.73.87.43	PTR	mx2.5linx.com
199.73.87.43	A	mx1.freevbc.com
199.73.87.45	A	ftp.5linx.com
199.73.87.45	A	ftps.5linx.com
199.73.87.46	PTR	ftps.5linx.com
199.73.87.53	PTR	53.87.73.199.5linx.com
199.73.87.54	PTR	199-73-87-54.5linx.com
199.73.87.54	A	mx1.freevbc.com
199.73.87.54	A	mx2.freevbc.com
199.73.87.59	PTR	199-73-87-59.5linx.com
199.73.87.61	PTR	199-73-87-61.5linx.com
199.73.87.64	PTR	64.87.73.199.5linx.com
199.73.87.74	PTR	74.87.73.199.5linx.com
199.73.87.83	PTR	83.87.73.199.5linx.com
199.73.87.87	PTR	199-73-87-87.5linx.com
199.73.87.97	PTR	199-73-87-97.5linx.com
199.73.87.105	PTR	105.87.73.199.5linx.com
199.73.87.110	PTR	110.87.73.199.5linx.com
199.73.87.120	PTR	199-73-87-120.5linx.com
199.73.87.124	PTR	124.87.73.199.5linx.com
199.73.87.139	PTR	139.87.73.199.5linx.com
199.73.87.147	PTR	147.87.73.199.5linx.com
199.73.87.150	PTR	199-73-87-150.5linx.com
199.73.87.150	A	mail.smerfkila.com
199.73.87.150	A	lazyadmin.org
199.73.87.152	PTR	152.87.73.199.5linx.com
199.73.87.153	PTR	mail.5linx.com
199.73.87.164	PTR	164.87.73.199.5linx.com
199.73.87.175	PTR	175.87.73.199.5linx.com
199.73.87.233	PTR	233.87.73.199.5linx.com
199.73.87.240	PTR	240.87.73.199.5linx.com