Robtex

Up: 216.146.40.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 216.146.40.0/25
Down right: 216.146.40.128/25
(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
216.146.40.113	A	sl1.sendlabs.com
216.146.40.113	A	sl5.sendlabs.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