Robtex

Up: 203.121.160.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 203.121.160.0/21
Down right: 203.121.168.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.121.160.99	PTR	mail.chr.co.th
203.121.160.123	PTR	mail.sofitel.co.th
203.121.160.132	PTR	smtp.oceanglass.com
203.121.161.158	A+PTR	gw.ha.or.th
203.121.161.222	PTR	bkkbox.com
203.121.162.67	PTR	mail.bigc.co.th
203.121.162.72	PTR	mis.bigc.co.th
203.121.162.72	PTR	mailgw.bigc.co.th.162.121.203.in-addr.arpa
203.121.162.76	PTR	ns.bigc.co.th
203.121.162.85	A	srs.bigc.co.th
203.121.162.227	PTR	mail.ndmi.or.th
203.121.163.219	PTR	mail.devss.com
203.121.163.227	A	zplthailand.com
203.121.164.77	A	mail.tlicarecenter.com
203.121.164.88	A	www.tlicarecenter.com
203.121.164.195	PTR	mail.tipco.net
203.121.164.250	PTR	mail.cyber-lock.com
203.121.165.2	A	3forfun.com
203.121.165.2	A	www.tv3mobile.com
203.121.165.2	A	xn--82ce6ap6ajgic2e8a9c9a6c4fhd2sh.com
203.121.165.7	A+PTR	mail.thanachart.co.th
203.121.165.16	A	game.tuk-tuk.com
203.121.165.16	A	tuk-tuk.com
203.121.165.16	A	twoplusonline.com
203.121.165.130	A	ns2.vingworld.tv
203.121.165.144	A	*.vingtv.com
203.121.166.2	PTR	pool-isdn-2.microthai.com
203.121.166.19	PTR	pool-isdn-19.microthai.com
203.121.166.32	PTR	pool-isdn-32.microthai.com
203.121.166.98	PTR	pool-isdn-98.microthai.com
203.121.166.115	PTR	pool-isdn-115.microthai.com
203.121.166.211	PTR	pool-isdn-211.microthai.com
203.121.166.241	PTR	pool-isdn-241.microthai.com
203.121.167.131	PTR	mx2.cpf.co.th
203.121.167.131	PTR	smtp.cpf.co.th
203.121.167.132	PTR	mail.cpf.co.th
203.121.167.202	PTR	mail.bkp.co.th
203.121.167.219	A	yourcp.com
203.121.167.219	A	cpfreshmartclub.com
203.121.167.235	PTR	smtp3.cpf.co.th
203.121.167.253	A	pacific.cpf-it.com
203.121.167.253	A	pi.cpconsumer.com
203.121.167.253	A	pi.fightingcockthailand.com
203.121.169.250	A	ask.co.th
203.121.169.251	A+PTR	mail.bgpl-lease.com
203.121.169.251	A	mail.bgpl.co.th
203.121.170.135	A	mail2.trienergy.co.th
203.121.170.178	A	mail.diethelmtravel.org
203.121.170.178	A	mail3.my.diethelmtravel.com
203.121.170.178	A	mail3.diethelmtravel.com
203.121.172.21	A+PTR	adcgoodnet-21.pacific.net.th
203.121.172.25	A+PTR	adcgoodnet-25.pacific.net.th
203.121.172.39	A+PTR	adcadsl-39.pacific.net.th
203.121.172.42	A+PTR	adcadsl-42.pacific.net.th
203.121.172.43	A+PTR	adcadsl-43.pacific.net.th
203.121.172.45	A	adcadsl-45.pacific.net.th
203.121.172.53	A+PTR	adcadsl-53.pacific.net.th
203.121.172.55	A+PTR	adcadsl-55.pacific.net.th
203.121.172.56	A+PTR	adcadsl-56.pacific.net.th
203.121.172.67	A+PTR	adcgoodnet-67.pacific.net.th
203.121.172.69	A+PTR	adcgoodnet-69.pacific.net.th
203.121.172.74	A	adcgoodnet-74.pacific.net.th
203.121.172.78	A+PTR	adcgoodnet-78.pacific.net.th
203.121.172.85	A	adcgoodnet-85.pacific.net.th
203.121.172.90	A+PTR	adcgoodnet-90.pacific.net.th
203.121.172.93	A	adcgoodnet-93.pacific.net.th
203.121.172.100	A+PTR	adcadsl-100.pacific.net.th
203.121.172.101	A	adcadsl-101.pacific.net.th
203.121.172.102	A+PTR	adcadsl-102.pacific.net.th
203.121.172.103	A+PTR	adcadsl-103.pacific.net.th
203.121.172.113	A+PTR	adcadsl-113.pacific.net.th
203.121.172.119	A+PTR	adcadsl-119.pacific.net.th
203.121.172.121	A+PTR	adcadsl-121.pacific.net.th
203.121.172.122	A	adcadsl-122.pacific.net.th