Robtex

Up: 23.29.128.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 23.29.136.0/22
Down right: 23.29.140.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
23.29.136.18	A+PTR	ip18.23-29-136.static.steadfastdns.net
23.29.136.28	A	newyork5.voip.ms
23.29.136.38	A	newyork7.voip.ms
23.29.136.40	A	newyork8.voip.ms
23.29.136.41	PTR	ip41.23-29-136.static.steadfastdns.net
23.29.136.41	A	ns4.vvsv3.com
23.29.136.41	A	radiobeachnews.com
23.29.136.78	A	ip78.23-29-136.static.steadfastdns.net
23.29.136.79	A	ns2.ejhost.com
23.29.136.79	A	ns1.ejhost.com
23.29.136.80	A+PTR	ip80.23-29-136.static.steadfastdns.net
23.29.136.80	A	vpn.blackvpn.com
23.29.136.80	A	usa.blackvpn.org
23.29.136.96	PTR	ip96.23-29-136.static.steadfastdns.net
23.29.136.99	A+PTR	ip99.23-29-136.static.steadfastdns.net
23.29.136.99	A	vpn.blackvpn.com
23.29.136.99	A	usa.blackvpn.org
23.29.136.105	PTR	server.phonerated.com
23.29.136.105	A	zemob.com
23.29.136.105	A	www.zemob.com
23.29.136.107	PTR	ip107.23-29-136.static.steadfastdns.net
23.29.137.133	A	probusinesstools2.com
23.29.141.1	PTR	ip1.23-29-141.static.steadfastdns.net
23.29.141.195	A	ip195.23-29-141.static.steadfastdns.net
23.29.143.40	A+PTR	ip40.23-29-143.static.steadfastdns.net
23.29.143.100	A	mx.arcval.com
23.29.143.107	A+PTR	ip107.23-29-143.static.steadfastdns.net
23.29.143.195	A+PTR	ip195.23-29-143.static.steadfastdns.net
23.29.143.214	A	ip214.23-29-143.static.steadfastdns.net
23.29.143.233	A+PTR	ip233.23-29-143.static.steadfastdns.net
23.29.143.238	A	ip238.23-29-143.static.steadfastdns.net