Robtex

Up: 175.28.0.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 175.28.0.0/23
Down right: 175.28.2.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
175.28.0.1	PTR	ix-phnkt-cr01.telcotech.com.kh
175.28.0.130	A	ipv4-c001-pnh001-telcotech-isp.1.oca.nflxvideo.net
175.28.0.130	A	occ-0-2306-58.1.nflxso.net
175.28.0.130	A	occ-0-2306-64.1.nflxso.net
175.28.0.131	A	occ-0-2306-58.1.nflxso.net
175.28.0.131	A	occ-0-2306-64.1.nflxso.net
175.28.0.131	A	ipv4-c002-pnh001-telcotech-isp.1.oca.nflxvideo.net
175.28.0.138	A	mx1.telcotech.com.kh
175.28.0.209	A	scontent.fpnh7-1.fna.fbcdn.net
175.28.0.210	A	video.fpnh7-1.fna.fbcdn.net
175.28.0.224	A	z-p3-scontent.fpnh7-1.fna.fbcdn.net
175.28.0.225	A	instagram.fpnh7-1.fna.fbcdn.net
175.28.0.226	A	media.fpnh7-1.fna.whatsapp.net
175.28.1.4	A	relay.telcotech.com.kh
175.28.1.5	A+PTR	relay1.telcotech.com.kh
175.28.1.11	A+PTR	ns1.telcotech.com.kh
175.28.1.12	A+PTR	ns2.telcotech.com.kh
175.28.1.14	PTR	mx2.telcotech.com.kh
175.28.1.22	PTR	domrey.telcotech.com.kh
175.28.1.24	A+PTR	mx1.telcotech.com.kh
175.28.1.26	A	mx2.telcotech.com.kh
175.28.1.44	A+PTR	mail.telcotech.com.kh
175.28.1.44	A	mx2.telcotech.com.kh
175.28.1.76	A	r1.sn-uxajvuxji-2ois.gvt1.com
175.28.1.76	A	r1.sn-uxajvuxji-2ois.c.pack.google.com
175.28.1.77	A	r2.sn-uxajvuxji-2ois.gvt1.com
175.28.1.77	A	r2.sn-uxajvuxji-2ois.googlevideo.com
175.28.1.140	A	r1.sn-uxajvuxji-2oil.c.pack.google.com
175.28.1.141	A	r2---sn-uxajvuxji-2oil.googlevideo.com
175.28.1.141	A	r2.sn-uxajvuxji-2oil.gvt1.com
175.28.1.142	A	r3---sn-uxajvuxji-2oil.googlevideo.com
175.28.1.152	A	wgsb.me
175.28.1.209	A	scontent.fpnh4-1.fna.fbcdn.net
175.28.1.210	A	video.fpnh4-1.fna.fbcdn.net
175.28.1.222	A	sonar.fpnh4-1.fna.fbcdn.net
175.28.1.224	A	instagram.fpnh4-1.fna.fbcdn.net
175.28.1.225	A	media.fpnh4-1.fna.whatsapp.net
175.28.1.226	A	z-p3-scontent.fpnh4-1.fna.fbcdn.net
175.28.2.146	PTR	dmc.com.kh
175.28.2.146	PTR	mail.dmc.com.kh
175.28.3.18	PTR	mail.huotraco.com.kh
175.28.3.36	A+PTR	mx1.dfdlmekong.com
175.28.3.50	A+PTR	imss.cambodia-airports.aero
175.28.3.51	A	sametime.cambodia-airports.aero
175.28.3.58	PTR	mail.thakral.com.kh
175.28.3.107	A+PTR	dmc.com.kh
175.28.3.107	A+PTR	nsms.com.kh
175.28.3.107	PTR	dmc.gov.kh
175.28.3.115	PTR	mail.invicen.com
175.28.3.115	PTR	mail.topup.com.kh
175.28.3.115	A	ns.topup.com.kh
175.28.3.130	A	mx.ketluy.com