Robtex

Up: 196.28.48.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 196.28.48.0/22
Down right: 196.28.52.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
196.28.48.67	A	ns1dsl.prtc.net
196.28.48.68	A+PTR	ns2dsl.prtc.net
196.28.48.77	A+PTR	prtstag.prtc.net
196.28.48.85	A	speed2.prtc.net
196.28.48.98	PTR	196-28-48-98.prtc.net
196.28.48.247	PTR	196-28-48-247.prtc.net
196.28.48.247	A	mail.prtdsl.net
196.28.48.247	A	mail.prtcdsl.com
196.28.49.74	A+PTR	coamo.puertorico.pr
196.28.49.74	A	www.coamo.puertorico.pr
196.28.49.86	A	placestogomagazine.com
196.28.49.116	PTR	196-28-49-116.prtc.net
196.28.49.117	PTR	www.caguas.gov.pr
196.28.49.117	A	mac.caguas.gov.pr
196.28.49.120	A+PTR	smtp.caguas.gov.pr
196.28.49.121	PTR	196-28-49-121.prtc.net
196.28.50.2	A	mail.robinsonschool.org
196.28.50.66	PTR	196-28-50-66.prtc.net
196.28.50.66	A	speed1.prtc.net
196.28.50.142	A	dns.guajana.net
196.28.50.162	PTR	www.cfse.gov.pr
196.28.50.179	PTR	avpexch.avp.pr.gov
196.28.50.198	A	r2d2.cunisanjuan.edu
196.28.50.202	A+PTR	mail.cunisanjuan.edu
196.28.50.203	A	classsvr.cunisanjuan.edu
196.28.50.205	A	ns2.cunisanjuan.edu
196.28.50.222	A	ns1.sanjuancapital.com
196.28.50.222	A	msj-dns-01.sanjuancapital.com
196.28.52.1	PTR	vpn.fw.bay.claropr.com
196.28.52.1	A	196-28-52-1.ao.prtc.net
196.28.52.1	A	www.ocspr.net
196.28.52.53	A	196-28-52-53.ao.prtc.net
196.28.53.121	A+PTR	mail2.mendezcopr.com
196.28.53.121	A	mail.mendezcopr.com
196.28.53.121	A	mx.mendezcopr.com
196.28.53.123	PTR	196-28-53-123.prtc.net
196.28.53.123	A	dns.mendezcopr.com
196.28.54.28	A	mail.orientalpr.com
196.28.54.202	PTR	prmailcc.ccprb.com
196.28.54.202	A	mail.yscoffee.com
196.28.54.202	A	ccprb.com
196.28.54.231	A	www.cee.pr.gov
196.28.54.231	A	cee.pr.gov
196.28.54.231	A	www.cee.gobierno.pr
196.28.55.72	PTR	196-28-55-72.prtc.net
196.28.55.72	A	deltamigo.com