Robtex

Up: 203.131.64.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 203.131.64.0/22
Down right: 203.131.68.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.131.64.8	PTR	adsl-131.64.8.info.com.ph
203.131.64.40	PTR	adsl-131.64.40.info.com.ph
203.131.67.2	PTR	adsl-131.67.2.info.com.ph
203.131.67.162	PTR	adsl-131.67.162.info.com.ph
203.131.68.229	A	ns1.247servers.com
203.131.69.192	PTR	adsl-131.69.192.info.com.ph
203.131.69.200	PTR	adsl-131.69.200.info.com.ph
203.131.70.98	PTR	pacific.wave.com.ph
203.131.70.98	A	gsd.com.ph
203.131.70.98	A	mail.dsp.com.ph
203.131.70.99	PTR	atlantic.wave.com.ph
203.131.70.248	PTR	adsl-131.70.248.info.com.ph