Robtex

Up: 198.58.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 198.58.40.0/22
Down right: 198.58.44.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
198.58.40.0	A+PTR	net-phl-40-58-198.coredial.com
198.58.40.44	A	phl-prod-kam-01.epbx.com
198.58.40.227	A+PTR	a1east.sipregistration.com
198.58.40.227	A	a1.east.sipregistration.com
198.58.40.227	A	mobile.a1east.sipregistration.com
198.58.40.228	PTR	a2east.sipregistration.com
198.58.40.228	A	a2.east.sipregistration.com
198.58.41.27	A+PTR	fe-1b29-1g.coredial.com
198.58.41.28	A+PTR	fe-1c29-4i.coredial.com
198.58.41.33	A+PTR	fe-2129-2a.coredial.com
198.58.41.38	A+PTR	fe-2629-7t.coredial.com
198.58.41.63	A+PTR	fe-3f29-4b.coredial.com
198.58.41.133	A	evoipcloud.com
198.58.41.142	A	allin1tele.com
198.58.41.151	A	bubblegumtelecom.com
198.58.41.190	A	voip-active.com
198.58.41.250	A	tcgvoip.com
198.58.41.250	A	iccvoicesolutions.com
198.58.41.250	A	ashbycloud.com
198.58.42.150	A	m.accessapi.com
198.58.42.153	A+PTR	sip.e2.sipregistration.com
198.58.42.157	A+PTR	sip.east.sipregistration.com
198.58.43.26	A+PTR	fe-10e6-q7.coredial.com
198.58.43.26	A	fe-10e6-q7.phl.coredial.com
198.58.43.41	A+PTR	fe-292b-8d.coredial.com
198.58.44.38	A	coredial.com
198.58.44.38	A	sip.west.sipregistration.com
198.58.44.42	A	m.accessapi.com
198.58.44.136	A+PTR	arya.coredial.com
198.58.44.136	A	ns3.switchconnex.net
198.58.44.136	A	ns3.faxhd.com
198.58.44.137	PTR	cersei.coredial.com
198.58.45.154	A	coredial.com
198.58.45.212	A	a1west.sipregistration.com
198.58.45.212	A	a1.west.sipregistration.com
198.58.45.213	A+PTR	a2west.sipregistration.com
198.58.45.213	A	a2.west.sipregistration.com