Robtex

Up: 216.146.40.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 216.146.41.0/25
Down right: 216.146.41.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.146.41.1	PTR	xe-0-2-0-60.core-01-pao.dyndns.com
216.146.41.9	PTR	mta6-03-pao.dyndns.com
216.146.41.10	A+PTR	mta6-01-pao.dyndns.com
216.146.41.12	PTR	carp6-01-pao.dyndns.com
216.146.41.36	A	track6-01-pao.dyndns.com
216.146.41.44	A+PTR	customer-content.dynect-sampler.dyndns.com
216.146.41.49	A+PTR	db6-05-pao.dyndns.com
216.146.41.66	A+PTR	portal.dynect.net
216.146.41.66	A	email.dynect.net
216.146.41.68	A+PTR	manage-pao.dynect.net
216.146.41.69	A	update.dynect.net
216.146.41.69	A	update-pao.dynect.net
216.146.41.71	A	mon-master-pao.dynect.net
216.146.41.80	A+PTR	api.email.dynect.net
216.146.41.80	A	emailapi.dynect.net
216.146.41.82	A	manage.dynect.com
216.146.41.87	A	mail.forexfounder.com
216.146.41.87	A	trk.email.dyndns.com
216.146.41.87	A	dyn.myopportunity.com
216.146.41.90	A+PTR	smtp-02-pao.dynect.net
216.146.41.93	A+PTR	smtp-large-pao.dynect.net
216.146.41.93	A	smtp-large.dynect.net
216.146.41.102	A+PTR	api-pao.dynect.net
216.146.41.102	A	api.dynect.net
216.146.41.103	PTR	unsub.email.dynect.net
216.146.41.105	A+PTR	mx-pao.dyndns.com
216.146.41.105	A	mx.dynect.net
216.146.41.105	A	mx-pao.dynect.net
216.146.41.106	PTR	trk.email-pao.dynect.net
216.146.41.107	PTR	link.email-pao.dynect.net
216.146.41.113	A	smtp-pao.dynect.net
216.146.41.113	A	smtp.dynect.net
216.146.41.120	PTR	dynect-email.net
216.146.41.120	A	mail.bouncelabs.com
216.146.41.120	A	*.dynect-email.net
216.146.41.121	A+PTR	email-pao.dynect.net
216.146.41.123	A+PTR	smtp-pao.dynect.net
216.146.41.123	A	smtp.dynect.net
216.146.41.167	A+PTR	cass4-02-pao.dyndns.com
216.146.41.190	A+PTR	carp-07-pao.dyndns.com
216.146.41.199	A+PTR	stageapi4-01-pao.dyndns.com
216.146.41.210	A+PTR	vlan145.a10-00-pao.dyndns.com