Robtex

Up: 121.1.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 121.1.0.0/18
Down right: 121.1.64.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
121.1.1.0	A	otserver.net
121.1.1.1	A	*.adszui.com
121.1.1.1	A	yz121.com
121.1.1.130	A+PTR	server.mgeups.com.ph
121.1.3.3	PTR	webmail.ees.smartbroadband.net.ph
121.1.3.3	A	smartbroadband.net.ph
121.1.3.4	PTR	mail.smartwifi.com.ph
121.1.3.4	PTR	mail.ees.smartbroadband.net.ph
121.1.3.4	A	webmail.ees.smartbroadband.net.ph
121.1.3.9	A	proxy.smartbro.net
121.1.3.83	A	proxy.smartbro.net
121.1.3.194	A+PTR	proxy-smtp2.smartbro.net
121.1.3.194	A+PTR	proxy.smartbro.net
121.1.3.194	A+PTR	proxy2.smartbro.net
121.1.7.237	A	www.cignal.net
121.1.7.237	A	e0-mdmm-94-vi1-ige.cignal.net
121.1.7.237	A	e0-mdmm-90-vi1-ige.cignal.net
121.1.9.18	PTR	mnhport.com.ph
121.1.9.18	PTR	www.mnhport.com.ph
121.1.9.19	A+PTR	mail1.mnhport.com.ph
121.1.11.1	PTR	mailserver.lcp.org.ph
121.1.11.3	PTR	nameserver2.lcp.org.ph
121.1.14.6	A	acl1-24bts.gw.smartbro.net
121.1.14.42	A	acl1-23bts.gw.smartbro.net
121.1.14.62	A	acl1-25bts.gw.smartbro.net
121.1.14.70	A	acl1-26bts.gw.smartbro.net
121.1.16.151	A	mail1.grmonline.com
121.1.16.151	A	mail1.htscenter.com
121.1.20.226	A	acl1-46bts.gw.smartbro.net
121.1.20.230	A	acl1-47bts.gw.smartbro.net
121.1.20.238	A	acl1-49bts.gw.smartbro.net
121.1.22.2	A	mail2.auraland.com.ph
121.1.22.5	A	acl1-54bts.gw.smartbro.net
121.1.24.10	A	acl1-59bts.gw.smartbro.net
121.1.24.54	A	acl1-73bts.gw.smartbro.net
121.1.24.202	A	acl1-67bts.gw.smartbro.net
121.1.25.190	A	acl1-90bts.gw.smartbro.net
121.1.26.14	A	acl1-105bts.gw.smartbro.net
121.1.26.78	A	acl1-112bts.gw.smartbro.net
121.1.29.214	A	acl1-114bts.gw.smartbro.net
121.1.30.78	A	acl1-123bts.gw.smartbro.net
121.1.31.102	A	acl1-126bts.gw.smartbro.net
121.1.31.152	A	www.ye-mao.com
121.1.32.195	PTR	mail.richem.com.ph
121.1.32.195	A	avcchem.com
121.1.32.195	A	chem-insurance.com
121.1.33.198	A	acl1-138bts.gw.smartbro.net
121.1.35.9	A+PTR	mail.corboxcorpceb.com
121.1.35.9	A	*.corboxcorpceb.com
121.1.37.19	PTR	sindo.com.ph
121.1.37.65	A	ns1.ibahn.net
121.1.37.66	PTR	fgmx1.ibahn.net.ph
121.1.37.66	A	ibahn.net.ph
121.1.37.66	A	pldtmx.techgearinc.com
121.1.41.4	PTR	mail3.phc.gov.ph
121.1.41.26	A	acerhomes.com
121.1.41.26	A	mail.verdantpoint.com
121.1.41.26	A	mail.acerhomes.com
121.1.43.74	A	acl1-166bts.gw.smartbro.net
121.1.43.134	A	acl1-156bts.gw.smartbro.net
121.1.44.243	A	acl1-174bts.gw.smartbro.net
121.1.44.244	A	acl1-175bts.gw.smartbro.net
121.1.46.10	A	acl1-182bts.gw.smartbro.net
121.1.46.22	A	acl1-187bts.gw.smartbro.net
121.1.46.54	A	acl1-190bts.gw.smartbro.net
121.1.46.74	A	acl1-192bts.gw.smartbro.net
121.1.47.30	A	acl1-208bts.gw.smartbro.net
121.1.47.62	A	acl1-212bts.gw.smartbro.net
121.1.47.186	A	acl1-200bts.gw.smartbro.net
121.1.47.198	A	acl1-201bts.gw.smartbro.net
121.1.48.194	PTR	comfacgroup.com.ph
121.1.48.195	PTR	comfacgroup.com
121.1.49.72	A	www.workatsmart.ph
121.1.49.82	A	staging.pldthome.com
121.1.49.95	A	webmail.mayniladwater.com.ph
121.1.49.135	A	pldthome.com
121.1.49.135	A	m.pldthome.com
121.1.49.135	A	www.pldthome.com
121.1.49.136	A	my.pldthome.com
121.1.51.202	A	acl1-228bts.gw.smartbro.net
121.1.53.5	A	acl1-275bts.gw.smartbro.net
121.1.53.6	A	acl1-286bts.gw.smartbro.net
121.1.53.7	A	acl1-288bts.gw.smartbro.net
121.1.53.10	A	acl1-234bts.gw.smartbro.net
121.1.55.2	A	acl1-293bts.gw.smartbro.net
121.1.56.22	A+PTR	surftv.smartbro.net
121.1.56.22	A+PTR	wimax.smartbro.net
121.1.56.23	A	ibroext1.smart.com.ph
121.1.57.102	A	acl1-298bts.gw.smartbro.net
121.1.58.30	A	acl1-319bts.gw.smartbro.net
121.1.58.110	A	acl1-313bts.gw.smartbro.net
121.1.59.130	PTR	mail1.sumitronics-phils.com
121.1.61.203	A	acl1-339bts.gw.smartbro.net
121.1.63.38	A	acl1-345bts.gw.smartbro.net
121.1.79.17	A	ohoddac.com
121.1.79.17	A	adbiniogflip.com
121.1.79.17	A	vfqszu.com
121.1.103.11	A	rawrs.us
121.1.107.135	A	rawrs.us
121.1.107.135	A	mx.rawrs.us