Robtex

Up: 173.224.16.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 173.224.16.0/25
Down right: 173.224.16.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.224.16.1	PTR	ns1.ptcnet.net
173.224.16.1	A	dns2.connections.net
173.224.16.1	A	mail.plvwtelco.net
173.224.16.2	A+PTR	smtp.ptcnet.net
173.224.16.2	A	ns2.ptcnet.net
173.224.16.7	A	smtp2.ptcnet.net
173.224.16.8	PTR	www.ptcnet.net
173.224.16.9	A	173-224-16-9.ptcnet.net
173.224.16.12	PTR	173-224-16-12.ptcnet.net
173.224.16.12	A	nita-ne.org
173.224.16.12	A	www.plvwtelco.net
173.224.16.13	A+PTR	173-224-16-13.ptcnet.net
173.224.16.13	A	www.plvwtelco.net
173.224.16.13	A	piercetelephone.com
173.224.16.19	A+PTR	173-224-16-19.ptcnet.net
173.224.16.28	A	173-224-16-28.ptcnet.net
173.224.16.38	A	173-224-16-38.ptcnet.net
173.224.16.41	A+PTR	173-224-16-41.ptcnet.net
173.224.16.43	A	173-224-16-43.ptcnet.net
173.224.16.49	A	173-224-16-49.ptcnet.net
173.224.16.55	A	173-224-16-55.ptcnet.net
173.224.16.67	A	173-224-16-67.ptcnet.net
173.224.16.73	A	173-224-16-73.ptcnet.net
173.224.16.93	A	173-224-16-93.ptcnet.net
173.224.16.102	A	mwbemm.com
173.224.16.104	A	173-224-16-104.ptcnet.net
173.224.16.112	A	173-224-16-112.ptcnet.net
173.224.16.114	PTR	173-224-16-114.ptcnet.net
173.224.16.114	A	webmail.midwestbanks.com
173.224.16.120	A	173-224-16-120.ptcnet.net
173.224.16.122	A	173-224-16-122.ptcnet.net
173.224.16.132	A	173-224-16-132.ptcnet.net
173.224.16.135	A	173-224-16-135.ptcnet.net
173.224.16.138	A+PTR	173-224-16-138.ptcnet.net
173.224.16.159	A	173-224-16-159.ptcnet.net
173.224.16.171	A	173-224-16-171.ptcnet.net
173.224.16.222	A	173-224-16-222.ptcnet.net
173.224.16.240	A	173-224-16-240.ptcnet.net
173.224.16.251	A+PTR	173-224-16-251.ptcnet.net
173.224.16.253	A	173-224-16-253.ptcnet.net