Robtex

Up: 49.231.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 49.231.28.0/23
Down right: 49.231.30.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
49.231.28.51	A	mx-1.nittsu.co.th
49.231.28.51	A	mx1.nittsu.co.th
49.231.30.13	PTR	49-231-30-13.sbn-idc.com
49.231.30.24	PTR	49-231-30-24.sbn-idc.com
49.231.30.24	A	ns01.nu.ac.th
49.231.30.30	PTR	49-231-30-30.sbn-idc.com
49.231.30.36	PTR	49-231-30-36.sbn-idc.com
49.231.30.36	A	transportindexthailand.com
49.231.30.36	A	www.satit.nu.ac.th
49.231.30.44	PTR	49-231-30-44.sbn-idc.com
49.231.30.44	A	ns03.nu.ac.th
49.231.30.49	PTR	49-231-30-49.sbn-idc.com
49.231.30.49	A	www.med.nu.ac.th
49.231.30.52	PTR	49-231-30-52.sbn-idc.com
49.231.30.52	A	reg.nu.ac.th
49.231.30.52	A	www.reg.nu.ac.th
49.231.30.57	PTR	49-231-30-57.sbn-idc.com
49.231.30.57	A	student.nu.ac.th
49.231.30.73	A	mail.nu.ac.th
49.231.30.85	PTR	49-231-30-85.sbn-idc.com
49.231.30.85	A	mail.nu.ac.th
49.231.30.94	A+PTR	ironport.nu.ac.th
49.231.30.101	PTR	49-231-30-101.sbn-idc.com
49.231.30.101	A	xn--42cfbd5dn4eh9bdc5acqw4ed1dgd8a1pe4a9njf.com
49.231.30.103	PTR	49-231-30-103.sbn-idc.com
49.231.30.103	A	mis.nu.ac.th
49.231.31.2	A	reverse.nu.ac.th