Robtex

Up: 204.13.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 204.13.16.0/22
Down right: 204.13.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.13.16.22	A+PTR	ns1.level365.com
204.13.16.22	A	ns3.level365.com
204.13.16.23	A+PTR	ns2.level365.com
204.13.16.23	A	ns4.level365.com
204.13.16.37	A	support365.net
204.13.16.85	A+PTR	ind-core1.365sip.com
204.13.16.90	A	sip.level365.com
204.13.17.130	A	*.zinkanandbarker.com
204.13.17.130	A	zinkanandbarker.com
204.13.17.130	A	geyeronline.com
204.13.17.131	A	frontlinetrg.com
204.13.17.145	A	plesk.level365.com
204.13.17.146	A	cloydlaw.com
204.13.17.146	A	mail.bplusw.com
204.13.17.146	A	wiltroutsales.com
204.13.17.200	A	www.myvoiceportal.com
204.13.17.200	A	myvoiceportal.com
204.13.20.13	A	artstix.org
204.13.20.26	A	careerally.org
204.13.21.202	A	mail.speedwaypubsafety.org
204.13.21.204	A	mail.speedwayin.gov
204.13.21.244	A+PTR	mail.wsystems.com
204.13.22.5	A	mail.morebrandwidth.com
204.13.22.7	A	owa.brandwidth.com
204.13.22.9	A	morebrandwidth.com
204.13.22.9	A	bwclients.com
204.13.22.9	A	*.brandwidth.com
204.13.22.11	A	bwtesting.com
204.13.22.34	PTR	mail.kenwill.com
204.13.22.50	A	mail.amcoelevators.com
204.13.22.76	A	mail.repucare.com
204.13.22.190	A	duef.com
204.13.22.195	A	mail.zinkanandbarker.com
204.13.23.18	A	indylug.com
204.13.23.18	A	thevisqueen.com
204.13.23.18	A	indylug.org