Robtex

Up: 121.58.216.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 121.58.216.0/23
Down right: 121.58.218.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
121.58.216.0	PTR	0.216.58.121.-rev.convergeict.com
121.58.216.2	A	dns1.dar.gov.ph
121.58.216.3	A	dns2.dar.gov.ph
121.58.216.24	A+PTR	mail.gicf.ph
121.58.216.24	A+PTR	mail.synlink.ph
121.58.216.24	A	synlink.ph
121.58.216.229	A	www.perpetualdalta.edu.ph
121.58.216.229	A	perpetualdalta.edu.ph
121.58.216.230	A	www.perpetual.edu.ph
121.58.216.240	A+PTR	mx1.uphmc.com.ph
121.58.216.243	A+PTR	www.uphmc.com.ph
121.58.217.18	A	www.mercanph.com
121.58.217.18	A	mail.mercanrecruit.com
121.58.217.18	A	ns.mercanph.com
121.58.217.42	A	www.everwing.com.ph
121.58.217.42	A	everwing.com.ph
121.58.217.50	A	junnets.com
121.58.217.58	A	anthesisph.com
121.58.217.82	A+PTR	mail6.puregold.com.ph
121.58.217.90	A+PTR	www.yutivo.com
121.58.217.90	A	ycweb.yutivo.com
121.58.217.139	A+PTR	mail.pharexhealth.com
121.58.217.197	A	emb.dti.gov.ph
121.58.217.212	A	dominospizza.ph
121.58.217.227	A	transco.ph
121.58.217.227	A	www.transco.ph
121.58.217.229	A	mail.transco.ph
121.58.217.248	A+PTR	mail.dkt.com.ph
121.58.218.196	A	ns2.e-telligent.net
121.58.218.199	PTR	ns2.tnkc-rohq.ph
121.58.218.200	A+PTR	mail.krbs.ph
121.58.219.114	A	osaka.netsectechph.com
121.58.219.255	PTR	255.219.58.121.-rev.convergeict.com