Robtex

Up: 200.3.192.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 200.3.200.0/22
Down right: 200.3.204.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
200.3.200.2	PTR	mail.romocia.com
200.3.200.2	A+PTR	mx.mobil.net.pa
200.3.200.2	A	mobilmail.net
200.3.200.3	PTR	mx2.mobil.net.pa
200.3.201.135	A	mailx.mobilphone.com
200.3.201.137	PTR	mobilphone.com
200.3.201.137	A+PTR	mail.mobilphone.com
200.3.202.1	PTR	net-200.3.202.1.mobilphone.com
200.3.204.19	PTR	net-200.3.204.19.mobilphone.com
200.3.204.91	PTR	net-200.3.204.91.mobilphone.com
200.3.204.107	PTR	net-200.3.204.107.mobilphone.com
200.3.204.137	PTR	net-200.3.204.137.mobilphone.com
200.3.204.146	PTR	net-200.3.204.146.mobilphone.com
200.3.204.160	PTR	net-200.3.204.160.mobilphone.com
200.3.204.161	PTR	net-200.3.204.161.mobilphone.com
200.3.204.163	PTR	net-200.3.204.163.mobilphone.com
200.3.204.185	PTR	net-200.3.204.185.mobilphone.com
200.3.204.193	PTR	net-200.3.204.193.mobilphone.com
200.3.204.202	PTR	net-200.3.204.202.mobilphone.com
200.3.204.249	PTR	net-200.3.204.249.mobilphone.com
200.3.205.129	PTR	mail.didasa.com.pa
200.3.205.130	PTR	net-200.3.205.130.mobilphone.com
200.3.205.183	A	mail.ptygps.com
200.3.205.183	A	mail.magaric.com
200.3.206.3	PTR	net-200.3.206.3.mobilphone.com
200.3.206.8	PTR	net-200.3.206.8.mobilphone.com
200.3.206.26	PTR	net-200.3.206.26.mobilphone.com
200.3.206.33	PTR	net-200.3.206.33.mobilphone.com
200.3.206.43	PTR	net-200.3.206.43.mobilphone.com
200.3.206.49	PTR	net-200.3.206.49.mobilphone.com
200.3.206.50	PTR	net-200.3.206.50.mobilphone.com
200.3.206.59	PTR	net-200.3.206.59.mobilphone.com
200.3.206.72	PTR	net-200.3.206.72.mobilphone.com
200.3.206.73	PTR	net-200.3.206.73.mobilphone.com
200.3.206.82	PTR	net-200.3.206.82.mobilphone.com
200.3.206.97	PTR	net-200.3.206.97.mobilphone.com
200.3.206.115	PTR	net-200.3.206.115.mobilphone.com
200.3.206.121	PTR	net-200.3.206.121.mobilphone.com
200.3.206.123	PTR	net-200.3.206.123.mobilphone.com
200.3.206.131	PTR	net-200.3.206.131.mobilphone.com
200.3.206.138	PTR	net-200.3.206.138.mobilphone.com
200.3.206.139	PTR	net-200.3.206.139.mobilphone.com
200.3.206.144	PTR	net-200.3.206.144.mobilphone.com
200.3.206.145	PTR	net-200.3.206.145.mobilphone.com
200.3.206.147	PTR	net-200.3.206.147.mobilphone.com
200.3.206.161	PTR	net-200.3.206.161.mobilphone.com
200.3.206.162	PTR	net-200.3.206.162.mobilphone.com
200.3.206.168	PTR	net-200.3.206.168.mobilphone.com
200.3.206.170	PTR	net-200.3.206.170.mobilphone.com
200.3.206.178	PTR	net-200.3.206.178.mobilphone.com
200.3.206.179	PTR	net-200.3.206.179.mobilphone.com
200.3.206.184	PTR	net-200.3.206.184.mobilphone.com
200.3.206.216	PTR	net-200.3.206.216.mobilphone.com
200.3.206.232	PTR	net-200.3.206.232.mobilphone.com
200.3.206.241	PTR	net-200.3.206.241.mobilphone.com
200.3.206.243	PTR	net-200.3.206.243.mobilphone.com
200.3.206.251	PTR	net-200.3.206.251.mobilphone.com
200.3.207.42	PTR	pimpsa.com.pa