Robtex

Up: 72.13.224.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 72.13.240.0/21
Down right: 72.13.248.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.13.242.4	A+PTR	4-242-13-72.static.cosmoweb.net
72.13.244.3	PTR	mail.americaskids.net
72.13.244.34	A	34-244-13-72.static.cosmoweb.net
72.13.244.147	A	mail.jmcohen.com
72.13.244.250	A	mail2.justonellc.com
72.13.247.2	PTR	mail.asphaltgreen.org
72.13.247.2	A	ns1.agtri.com
72.13.247.50	PTR	50-247-13-72.static.cosmoweb.net
72.13.247.50	A	educationinnovators.com
72.13.247.50	A	alberthazan.com
72.13.247.163	A	lushjewels.com
72.13.247.172	A	172-247-13-72.static.cosmoweb.net
72.13.247.172	A	henrydunay.com
72.13.247.172	A	exchange1.henrydunay.com
72.13.248.2	A	2-248-13-72.static.cosmoweb.net
72.13.249.100	A	publicroutes.com
72.13.249.100	A	www.publicroutes.com
72.13.249.114	A	mail.publicroutes.com
72.13.249.114	A	outgoing.publicroutes.com
72.13.249.122	A	122-249-13-72.static.cosmoweb.net
72.13.249.132	A	132-249-13-72.static.cosmoweb.net
72.13.249.135	A	135-249-13-72.static.cosmoweb.net
72.13.249.215	A	perim3.chichestercap.com
72.13.249.220	A	mail1.crossbowcm.com
72.13.249.220	A	mail1.chichestercap.com
72.13.249.221	A	smtp.chichestercap.com
72.13.249.226	A	226-249-13-72.static.cosmoweb.net
72.13.249.227	PTR	mail.csh.org
72.13.250.66	A	server1.trapz-usa.com
72.13.250.83	A	mail.12345us.com
72.13.250.83	A	12345us.com
72.13.250.210	A+PTR	mail.friedmanwittenstein.com
72.13.250.242	A	242-250-13-72.static.cosmoweb.net
72.13.253.1	A+PTR	1-253-13-72.static.cosmoweb.net
72.13.254.26	PTR	mail.gcnygroup.com
72.13.254.26	A	mail.he2pa.com
72.13.254.26	A	mail.springlinebuilders.com
72.13.254.90	A	mail.interiordesignforce.com
72.13.254.114	A	114-254-13-72.static.cosmoweb.net
72.13.254.226	A	mail.enternyc.com
72.13.254.226	A	light.enternyc.com
72.13.254.226	A	mail.enterels.com
72.13.255.255	A	255-255-13-72.static.cosmoweb.net