Robtex

Up: 203.242.0.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 203.242.0.0/19
Down right: 203.242.32.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.242.32.2	PTR	ns.hmm21.com
203.242.32.2	A+PTR	ns.mtkg.com
203.242.32.2	PTR	hdplco.hyplan.co.kr
203.242.32.68	A	wp.hyundai-uni.com
203.242.32.80	PTR	ns2.hmm21.com
203.242.32.80	PTR	ns2.mtkg.com
203.242.32.80	A	ns2.hmms.co.kr
203.242.32.82	A	obtest.hmm21.com
203.242.32.82	A	dev-tos.hmm21.com
203.242.32.154	PTR	kor-fe-08.hmm21.com
203.242.32.154	A	kor.hmm21.com
203.242.32.154	A	eur.hmm21.com
203.242.32.157	A	eur.hmm21.com
203.242.32.157	A	ekp.hdasan.com
203.242.32.196	A	tour.hdasan.com
203.242.32.197	A	04.hdasan.com
203.242.32.223	A	bsc.hmm21.com
203.242.35.72	A	dms.hmm21.com
203.242.35.130	A	mdm.hmm21.com
203.242.35.208	A+PTR	hyep.hmm21.com
203.242.35.208	A	hhmp.hmm21.com
203.242.35.208	A	gams.hmm21.com
203.242.35.209	PTR	hmms.co.kr
203.242.35.210	PTR	mrtg.hmm21.com
203.242.40.10	A	mifmp.net
203.242.40.11	PTR	mail1.hyundai-uni.com
203.242.40.11	A+PTR	mailedge.hyundai-uni.com
203.242.40.11	A+PTR	mailedge.hyundaigroup.com
203.242.40.13	A	owa.hdlc.co.kr
203.242.40.19	A	mailedge.hyundai-uni.com
203.242.40.19	A	mailedge.hyundaigroup.com
203.242.40.101	A	outlook.hyundai-hotel.co.kr
203.242.40.101	A	owa.hdasan.com
203.242.40.240	PTR	gaiaptn.e-hlc.com
203.242.40.240	PTR	haezle.e-hlc.com
203.242.40.240	PTR	vms.e-hlc.com
203.242.40.244	PTR	testmpx.hmm21.com
203.242.40.244	PTR	oldheip.hmm21.com
203.242.43.132	PTR	owa.hdlc.co.kr
203.242.43.132	A+PTR	autodiscover.hyundai-invest.com
203.242.43.132	A+PTR	outlook.hyundai-invest.com
203.242.43.135	PTR	mail1.hyundai-uni.com
203.242.43.135	PTR	mailedge.hyundai-uni.com
203.242.43.135	PTR	mail1.hyundaigroup.com
203.242.58.5	A	mail1.hyplan.co.kr
203.242.58.6	A	mail.hyplan.co.kr
203.242.63.84	A	fc.jookjun.net
203.242.63.85	A	fc.jookjun.net
203.242.63.85	A	jookjunacro.net
203.242.63.85	A	34.jookjun.net
203.242.63.210	A	ns.acrofon.com