Robtex

Up: 203.253.128.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.253.128.0/23
Down right: 203.253.130.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.253.128.2	A+PTR	ketopia.keti.kr
203.253.128.2	PTR	nuri.keti.re.kr
203.253.128.2	A+PTR	webmail.keti.re.kr
203.253.128.7	A+PTR	nuri0.keti.kr
203.253.128.7	A+PTR	nuri0.keti.re.kr
203.253.128.7	A+PTR	keti.re.kr.keti.re.kr
203.253.128.11	A+PTR	ketopia.keti.kr
203.253.128.44	A+PTR	smf.keti.kr
203.253.128.44	A+PTR	smf.keti.re.kr
203.253.128.145	A	www.keti.kr
203.253.128.152	A	open-iot.net
203.253.128.152	A	www.iotocean.org
203.253.128.152	A	www.iotmobius.com
203.253.128.155	PTR	www.motor-tech.com
203.253.128.163	A	open-iot.net
203.253.128.163	A	www.open-iot.net
203.253.128.237	A+PTR	nuri1.keti.re.kr
203.253.128.238	PTR	nuri0.keti.re.kr