Robtex

Up: 216.57.64.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 216.57.80.0/21
Down right: 216.57.88.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.57.80.2	A+PTR	ns4.mtsolutions.net
216.57.80.2	A	mail.perryhicks.net
216.57.80.2	A	smtp.mtsolutions.net
216.57.80.4	PTR	zimbra1.mtsolutions.net
216.57.80.34	A+PTR	ns3.mtsolutions.net
216.57.80.45	A+PTR	web1.mtsolutions.net
216.57.80.45	A	www.mtsolutions.net
216.57.80.45	A	mlnunescpa.com
216.57.80.65	A+PTR	zimbra1.mtsolutions.net
216.57.80.65	A	mtsimail.com
216.57.80.66	A+PTR	zimbra2.mtsolutions.net
216.57.80.67	PTR	zimbra3.mtsolutions.net
216.57.80.67	A	mail.fallriverma.org
216.57.80.69	PTR	ns1.mtsolutions.net
216.57.80.71	A	www.mtsolutions.net
216.57.80.200	A	mail.ghhg.com
216.57.80.200	A	mail.grandheritage.com
216.57.80.220	A+PTR	zimbra.mtsolutions.net
216.57.80.220	A	webmail.frpd.org
216.57.80.220	A	zimbra.mtsimail.net
216.57.81.162	A	mail.bristolelder.org
216.57.82.124	A	mail.klsandg.com
216.57.83.50	PTR	mail.intrumcorp.com
216.57.83.194	A	ns2.ssmedcenter.org
216.57.83.194	A	ns2.southshorehospital.org
216.57.83.194	A	ns2.southshoremed.org
216.57.83.199	A	seanet.sshosp.org
216.57.83.220	A	expectmoreatsouthshore.com
216.57.83.220	A	expectmoreatsouthshore.org
216.57.83.220	A	expectmoreatsouthshore.net
216.57.83.233	A	myworkspace.sshosp.org
216.57.83.249	A	www.sspho.org
216.57.83.249	A	sspho.org
216.57.84.42	A+PTR	sbsserver.afcmentoring.net
216.57.84.42	A	afcmentoring.net
216.57.85.68	A	mail.massteacher.org
216.57.85.104	A	sonar.neaq.org
216.57.88.24	A	mail.jche.org
216.57.88.34	A	34.sonesta-boston.com
216.57.88.39	A	email.sonesta-boston.com
216.57.88.102	PTR	mail.fullarmor.com
216.57.88.138	PTR	mail.eons.com
216.57.88.142	A	tributesinfo.com
216.57.88.178	A+PTR	mail1.walshbrothers.com
216.57.88.178	A	mail.walshbrothers.com
216.57.88.179	A+PTR	webmail.walshbrothers.com
216.57.89.5	A	secure2.bostonsand.com
216.57.89.6	A	mta2.bostonsand.com
216.57.89.34	A+PTR	mail10b.stategarden.com
216.57.89.66	PTR	backup.petercondakes.com
216.57.89.132	PTR	blueprint.spinfish.net
216.57.89.148	PTR	mail.1366tech.com
216.57.89.148	A	support.1366tech.com
216.57.89.178	A	mail2.03am.com
216.57.90.193	PTR	fa5-0.br1-han-bos-ma.pipelinewireless.net
216.57.90.194	PTR	fa6-0.br1-1bp-bos-ma.pipelinewireless.net
216.57.91.34	PTR	hurontwr-91-34.cust.pipelinewireless.com
216.57.91.144	A	showcasecloud.us
216.57.91.212	A	mail.grouponeinc.com
216.57.91.245	PTR	wall-boston.photonconsulting.com
216.57.92.62	A	betweenhours.com
216.57.92.70	PTR	expedition.bondbros.com
216.57.92.98	PTR	athens.pghworld.com
216.57.92.202	PTR	health.securerecord.com
216.57.92.202	PTR	mailhost.securerecord.com
216.57.92.202	A	signbyphone.com
216.57.92.203	A	mailhost.securerecord.com
216.57.93.83	A+PTR	mail.thecopleygroup.com
216.57.93.154	PTR	mail.progenika.us
216.57.93.195	PTR	mail.sherrillhouse.org