Robtex

Up: 216.146.40.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.146.40.0/23
Down right: 216.146.42.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.146.40.1	A+PTR	60.xe-0-2-0.core-01-ewr.as33517.net
216.146.40.11	A	mta6-02-ewr.dyndns.com
216.146.40.49	A	db6-05-ewr.dyndns.com
216.146.40.80	PTR	www.dyn.com
216.146.40.83	A+PTR	a.dyn.com
216.146.40.87	A	mail.forexfounder.com
216.146.40.87	A	trk.email.dyndns.com
216.146.40.87	A	dyn.myopportunity.com
216.146.40.91	A+PTR	help.dynect.net
216.146.40.91	A	api4lyfe.com
216.146.40.91	A	mail.api4lyfe.com
216.146.40.93	A+PTR	smtp474328.dynect.net
216.146.40.93	A	smtp.dynect.net
216.146.40.96	A	smtp-large.dynect.net
216.146.40.98	PTR	sendapi2-ewr.dynect.net
216.146.40.99	PTR	www.dlinkddns.com
216.146.40.100	A+PTR	whois.dyndns.com
216.146.40.105	A	mail.sendlabs.com
216.146.40.105	A	mx-ewr.dynect.net
216.146.40.110	A+PTR	smtp474328.dynect.net
216.146.40.110	A	smtp.dynect.net
216.146.40.111	A	www.largesmall.com
216.146.40.111	A	largesmall.com
216.146.40.111	A	1spot.com
216.146.40.112	A+PTR	email-sendapi-01-usnbn1.dynect.net
216.146.40.112	A	www.largesmall.com
216.146.40.112	A	largesmall.com
216.146.40.120	A+PTR	dynect-email.net
216.146.40.120	A	*.dynect-email.net
216.146.40.120	A	dynect-email.com
216.146.40.126	PTR	emailapi-usnbn1.dynback.net
216.146.40.126	A	mailship5.sendlabs.com
216.146.40.126	A	mailship.sendlabs.com
216.146.40.169	A	horseplayersexpo.com
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.dynect.net
216.146.41.113	A	smtp-pao.dynect.net
216.146.41.120	PTR	dynect-email.net
216.146.41.120	A	*.dynect-email.net
216.146.41.120	A	x2a.dynect-email.net
216.146.41.121	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
216.146.42.1	PTR	ge-1-0-0-5.core-01-dfw.dyndns.com
216.146.42.1	A	0.ge-1-0-0.core-01-dfw.as33517.net
216.146.42.2	PTR	ge-0-0-1-5.vpn-01-dfw.dyndns.com
216.146.42.2	A	0.ge-0-0-1.vpn-01-dfw.as33517.net
216.146.42.24	PTR	lo0.core-01-dfw.dyndns.com
216.146.42.24	A	core-01-dfw.dyndns.com
216.146.42.88	A	mail.ati-messagerie.net
216.146.42.88	A	ati-messagerie.net
216.146.42.133	A+PTR	agent4-01-dfw.dyndns.com
216.146.42.134	A+PTR	agent4-02-dfw.dyndns.com
216.146.42.150	A+PTR	cp20-01-dfw.dyndns.com
216.146.42.171	A	ig3-01-dfw.dyndns.com
216.146.42.172	A+PTR	ig3-02-dfw.dyndns.com
216.146.43.1	A	0.ge-1-0-7.core-01-waw.as33517.net
216.146.43.35	A+PTR	sak-01-waw.dyndns.com
216.146.43.62	A+PTR	kvm-02-waw.dyndns.com
216.146.43.70	A+PTR	checkip-waw.dyndns.com
216.146.43.70	A	theoandplomp.com
216.146.43.70	A	themassicator.com
216.146.43.71	A+PTR	checkip.dyndns.com
216.146.43.71	A	theoandplomp.com
216.146.43.71	A	checkip-waw.dyndns.com
216.146.43.133	A+PTR	agent4-01-waw.dyndns.com
216.146.43.150	A+PTR	cp20-01-waw.dyndns.com
216.146.43.171	A	ig3-01-waw.dyndns.com
216.146.43.172	A	ig3-02-waw.dyndns.com