Robtex

Up: 67.215.110.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 67.215.111.0/25
Down right: 67.215.111.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
67.215.111.28	A+PTR	mail.email.openmobilepr.com
67.215.111.28	A	mms.openmobilepr.com
67.215.111.167	A	services.openmobilepr.com
67.215.111.172	A	om4pr.com
67.215.111.190	A	ns1.mobiles.openmobilepr.com
67.215.111.190	A	ns1.om4pr.com
67.215.111.190	A	ns1.miolapr.com
67.215.111.210	A	mail.mobiles.openmobilepr.com