Robtex

Up: 58.137.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 58.137.16.0/23
Down right: 58.137.18.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
58.137.17.142	A+PTR	mbox.nipponexpress.co.th
58.137.17.246	A	webapp.sgl.co.th
58.137.18.3	A+PTR	mail.rcithailand.com
58.137.18.4	A+PTR	mail2.rcithailand.com
58.137.18.6	A	www.rcithailand.com
58.137.18.12	A	www.boontreefood.com
58.137.18.131	A	ns1.lis.co.th
58.137.18.138	A	mail.lis.co.th
58.137.18.142	PTR	lis.co.th
58.137.18.142	PTR	mail.kenmax.co.th
58.137.18.142	A	www.lis.co.th
58.137.18.155	A+PTR	mail.thaidairy.co.th
58.137.18.155	A	mail2.thaidairy.co.th
58.137.18.173	A+PTR	ticedge01.thaiins.com
58.137.18.173	A	viruswall.thaiins.com
58.137.18.177	A	www.thaiins.co.th
58.137.18.177	A	thaiins.co.th
58.137.18.178	A	www.thaiins.com
58.137.18.178	A	thaiins.com
58.137.18.196	A+PTR	mail.scottwilson.com.au
58.137.18.228	A	mail.sphinxpartners.com
58.137.19.10	A	ships1.allitservices.com
58.137.19.11	A	www.9wgpair.com
58.137.19.11	A	www.allitservices.com
58.137.19.12	A	precious4.allitservices.com
58.137.19.14	A+PTR	gp2.allitservices.com
58.137.19.14	A	allitservices.com
58.137.19.21	A+PTR	precious6.allitservices.com
58.137.19.21	A	ambikatours.com
58.137.19.21	A	ngindia.com
58.137.19.22	PTR	precious7.allitservices.com
58.137.19.35	A	ambikatours.com
58.137.19.35	A	www.ambikatours.com
58.137.19.35	A	psltraining.com