Robtex

Up: 203.121.168.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.121.172.0/23
Down right: 203.121.174.0/23

IP	Type	Hostname
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
203.121.172.46	A+PTR	adcadsl-46.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
203.121.172.108	A+PTR	adcadsl-108.pacific.net.th
203.121.172.111	A+PTR	adcadsl-111.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+PTR	adcadsl-122.pacific.net.th
203.121.172.124	A+PTR	adcadsl-124.pacific.net.th