Robtex

Up: 203.189.128.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 203.189.128.0/25
Down right: 203.189.128.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.189.128.1	A+PTR	dns1.online.com.kh
203.189.128.1	A	dns1.bigpond.com.kh
203.189.128.2	A+PTR	dns2.online.com.kh
203.189.128.2	A	dns2.bigpond.com.kh
203.189.128.3	A+PTR	db1.online.com.kh
203.189.128.4	A+PTR	r1.online.com.kh
203.189.128.5	PTR	dns5.online.com.kh
203.189.128.6	PTR	admin-01.online.com.kh
203.189.128.7	A+PTR	notes.online.com.kh
203.189.128.9	A+PTR	t1.online.com.kh
203.189.128.11	A+PTR	mx02.online.com.kh
203.189.128.12	A+PTR	mail.online.com.kh
203.189.128.12	A	mail.bigpond.com.kh
203.189.128.15	PTR	ftp.online.com.kh
203.189.128.15	A	speedtest.online.com.kh
203.189.128.17	PTR	mail.cogetel.com.kh
203.189.128.17	A	softhomecambodia.com
203.189.128.17	A	dpcc.com.kh
203.189.128.19	A	uam.online.com.kh
203.189.128.20	A+PTR	mx03.online.com.kh
203.189.128.20	A	msg.online.com.kh
203.189.128.22	PTR	mx03.online.com.kh
203.189.128.27	A	mail.3tel.com.kh
203.189.128.27	A	ddns.online.com.kh
203.189.128.29	PTR	web02.online.com.kh
203.189.128.29	PTR	www.online.com.kh
203.189.128.30	A+PTR	mx01.online.com.kh
203.189.128.32	PTR	mx02.online.com.kh
203.189.128.36	A+PTR	smtp03.online.com.kh
203.189.128.38	A+PTR	zb.online.com.kh
203.189.128.43	PTR	mail.cambolinux.info
203.189.128.44	PTR	ipass-01.online.com.kh
203.189.128.44	PTR	supportsrv.online.com.kh
203.189.128.55	A+PTR	db2.online.com.kh
203.189.128.56	A+PTR	r2.online.com.kh
203.189.128.59	A+PTR	t2.online.com.kh
203.189.128.61	PTR	mx04.online.com.kh
203.189.128.66	PTR	battambang-town.gov.kh
203.189.128.66	PTR	siemreap-town.gov.kh
203.189.128.67	PTR	ns3.telesurf.com.kh
203.189.128.68	A	online.com.kh
203.189.128.68	A	deam.com.kh
203.189.128.68	A	cpanel.online.com.kh
203.189.128.92	A+PTR	mx04.online.com.kh
203.189.128.93	A	mx01.online.com.kh
203.189.128.97	A	www.bigpond.com.kh
203.189.128.97	A	ftp.online.com.kh
203.189.128.98	A+PTR	cpanel.online.com.kh
203.189.128.98	A	online.com.kh
203.189.128.98	A	passapptaxis.com
203.189.128.99	A+PTR	webmail.online.com.kh
203.189.128.99	PTR	www.online.com.kh
203.189.128.99	A	web02.online.com.kh
203.189.128.100	A	www.bigpond.com.kh
203.189.128.100	A	ftp.online.com.kh
203.189.128.100	A	cambodiaadventist.org.kh
203.189.128.110	A+PTR	support.online.com.kh
203.189.128.110	A	azgroup.com.kh
203.189.128.110	A	www.3tel.com.kh
203.189.128.111	A	charmingcambodia.com
203.189.128.120	A+PTR	s-02-pnh-noc.online.com.kh
203.189.128.126	PTR	r-01-pnh-noc-e0-hub.online.com.kh
203.189.128.129	PTR	mcus.online.com.kh
203.189.128.129	A+PTR	subscriber.online.com.kh
203.189.128.140	A+PTR	ibs1.online.com.kh
203.189.128.147	A	support.online.com.kh
203.189.128.162	PTR	xx.online.com.kh
203.189.128.163	A+PTR	nas-01-pnh-itc.online.com.kh
203.189.128.164	A+PTR	nas-02-pnh-itc.online.com.kh
203.189.128.165	A+PTR	nas-03-pnh-itc.online.com.kh
203.189.128.166	A+PTR	nas-04-pnh-itc.online.com.kh
203.189.128.174	PTR	s-01-pnh-itc.online.com.kh
203.189.128.219	A	r-01-pnh-itc.online.com.kh
203.189.128.224	A+PTR	r-02-pnh-noc1.online.com.kh
203.189.128.232	A+PTR	r-01-pnh-noc1.online.com.kh
203.189.128.233	PTR	r-04-pnh-noc1.online.com.kh
203.189.128.236	A+PTR	r-01-pnh-cmthq.online.com.kh
203.189.128.238	PTR	r-01-pnh-bpl.online.com.kh
203.189.128.241	A	r-02-pnh-atc.online.com.kh
203.189.128.244	A+PTR	r-01-pnh-bss.online.com.kh
203.189.128.245	A+PTR	r-05-pnh-noc1.online.com.kh
203.189.128.246	A+PTR	r-02-pnh-itc.online.com.kh
203.189.128.247	PTR	r-01-srp-mob.online.com.kh
203.189.128.248	A+PTR	r-01-svr-mptc.online.com.kh
203.189.128.249	A+PTR	r-01-srp-mptc.online.com.kh
203.189.128.251	A+PTR	r-02-pnh-bke.online.com.kh
203.189.128.253	PTR	r-01-pnh-noc.online.com.kh
203.189.128.254	A+PTR	r-01-pnh-atc.online.com.kh