Robtex

Up: 216.44.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 216.44.0.0/18
Down right: 216.44.64.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.44.1.1	A	mail.xthowis.com
216.44.1.1	A	cashman-gw.nerdsintheknow.com
216.44.1.3	A+PTR	mail.nerdsintheknow.com
216.44.1.12	A	perfprog.com
216.44.6.2	A	gw.marubeni-usa.com
216.44.6.5	A	mailhost.marubeni-usa.com
216.44.6.18	A	ns2.marubeni-usa.com
216.44.6.19	A	njs-proxy.marubeni-usa.com
216.44.16.3	A	r1.hck.carroll.com
216.44.20.1	A	de3.core1.hck.carroll.com
216.44.20.2	A	znb3.r1.hck.carroll.com
216.44.20.4	A	as1.hck.carroll.com
216.44.20.5	A	mail.giresi.com
216.44.20.129	A	jpc-gw.hck.carroll.com
216.44.20.130	A	mail.jpc.hck.carroll.com
216.44.20.136	A	m06.jpc.hck.carroll.com
216.44.20.139	A	m09.jpc.hck.carroll.com
216.44.23.4	PTR	mrinse3.hck.carroll.com
216.44.23.4	A	mrinse1.hck.carroll.com
216.44.23.5	A+PTR	mrinse5.hck.carroll.com
216.44.23.6	A+PTR	mrinse4.hck.carroll.com
216.44.23.6	A	mrinse2.hck.carroll.com
216.44.24.249	A	m08.dbsciences.com
216.44.30.3	A+PTR	mrinse6.wee.carroll.com
216.44.45.115	A+PTR	gateway.damato-lynch.com
216.44.45.115	PTR	gateway.demato-lynch.com
216.44.54.15	A	leopold.daiwausa.com
216.44.82.163	A	mail1.reconcapital.com
216.44.82.164	A	mail.reconcapital.com
216.44.83.62	A	exchange.millenniumag.com
216.44.83.201	A	mail.csbanyc.com
216.44.83.201	A	mail.csbanyc.org
216.44.115.38	A	pnh-38.netrom.com
216.44.115.65	A	lindenhs-65.netrom.com
216.44.116.3	A	mail.lawyerphone.com
216.44.116.3	A	mail.travelagentphone.com
216.44.116.3	A	mail.autodealerphone.com
216.44.117.134	A	montgomerycountyva.gov
216.44.124.248	A	travelagentphone.com