Robtex

Up: 216.53.184.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.53.188.0/23
Down right: 216.53.190.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.53.188.18	PTR	vacant.static.mpinet.com
216.53.188.66	PTR	www.linkreducer.com
216.53.188.73	PTR	ns2.precisioncomputers.com
216.53.188.75	PTR	gowild.com
216.53.188.78	PTR	vacant.static.mpinet.com
216.53.189.105	PTR	www.armourgates.com
216.53.189.153	PTR	datamaxcorp.com
216.53.190.120	PTR	mail.jigawatt.com
216.53.190.224	PTR	mindcomet.com
216.53.190.243	A+PTR	datalinesys.com
216.53.190.243	A	ftp.datalinesys.com
216.53.190.243	A	www.datalinesys.com
216.53.191.24	PTR	dnawebservices.net
216.53.191.24	A	us1golfclub.com
216.53.191.24	A	roofservicescontractingconsulting.com
216.53.191.27	PTR	dnawebservices.net
216.53.191.30	PTR	dnawebservices.net
216.53.191.30	A	mail.accurateirrigationandpump.com
216.53.191.30	A	mail.beachsidepetsitting.com
216.53.191.32	PTR	dnawebservices.us
216.53.191.48	A	ns1.eoriginate.com
216.53.191.49	A+PTR	ns2.eoriginate.com