Robtex

Up: 200.23.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 200.23.248.0/22
Down right: 200.23.252.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
200.23.248.1	A+PTR	ns.telnor.com
200.23.248.10	A+PTR	www.telnor.com
200.23.248.10	A	telnor.com
200.23.248.18	A+PTR	200.23.248.18.ded.telnor.net
200.23.248.23	A	200.23.248.23.ded.telnor.net
200.23.248.32	A	200.23.248.32.ded.telnor.net
200.23.248.41	A	200.23.248.41.ded.telnor.net
200.23.248.52	A	200.23.248.52.ded.telnor.net
200.23.248.53	A	200.23.248.53.ded.telnor.net
200.23.248.68	A	200.23.248.68.ded.telnor.net
200.23.248.78	A	200.23.248.78.ded.telnor.net
200.23.248.84	A	200.23.248.84.ded.telnor.net
200.23.248.90	A	200.23.248.90.ded.telnor.net
200.23.248.98	A	200.23.248.98.ded.telnor.net
200.23.248.99	A	200.23.248.99.ded.telnor.net
200.23.248.101	A	200.23.248.101.ded.telnor.net
200.23.248.102	A	200.23.248.102.ded.telnor.net
200.23.248.104	A+PTR	200.23.248.104.ded.telnor.net
200.23.248.105	PTR	200.23.248.105.ded.telnor.net
200.23.248.106	A	200.23.248.106.ded.telnor.net
200.23.248.110	A	200.23.248.110.ded.telnor.net
200.23.248.113	A	200.23.248.113.ded.telnor.net
200.23.248.124	A	200.23.248.124.ded.telnor.net
200.23.248.136	A	200.23.248.136.ded.telnor.net
200.23.248.139	PTR	200.23.248.139.ded.telnor.net
200.23.248.145	A	200.23.248.145.ded.telnor.net
200.23.248.153	A	200.23.248.153.ded.telnor.net
200.23.248.155	A	200.23.248.155.ded.telnor.net
200.23.248.182	A	200.23.248.182.ded.telnor.net
200.23.248.193	A	200.23.248.193.ded.telnor.net
200.23.248.194	A	200.23.248.194.ded.telnor.net
200.23.248.203	A	200.23.248.203.ded.telnor.net
200.23.248.211	A	200.23.248.211.ded.telnor.net
200.23.248.227	A	200.23.248.227.ded.telnor.net
200.23.248.238	A	200.23.248.238.ded.telnor.net
200.23.248.241	A	200.23.248.241.ded.telnor.net
200.23.248.245	A	200.23.248.245.ded.telnor.net
200.23.248.246	A	200.23.248.246.ded.telnor.net
200.23.248.248	A	200.23.248.248.ded.telnor.net
200.23.249.1	A+PTR	telnor.net
200.23.249.1	A+PTR	dns.telnor.net
200.23.249.2	A	catalyst.telnor.net
200.23.249.3	A+PTR	gateway.telnor.net
200.23.249.4	PTR	admin.telnor.net
200.23.249.8	A+PTR	goku.telnor.net
200.23.249.12	A	radtelnor2.telnor.net
200.23.249.13	A+PTR	radtelnor1.telnor.net
200.23.249.15	A	snmp.telnor.net
200.23.249.20	A+PTR	monitor.telnor.net
200.23.249.23	A+PTR	cw1.telnor.net
200.23.249.24	A	csecure.telnor.net
200.23.249.25	A+PTR	ctm.telnor.net
200.23.249.31	A	vsuite.telnor.net
200.23.249.35	A	swadm.telnor.net
200.23.249.50	A	dns3.telnor.net
200.23.249.51	A	dns4.telnor.net
200.23.250.34	PTR	200.23.250.34.ded.telnor.net
200.23.251.51	A+PTR	200.23.251.51.ded.telnor.net
200.23.251.114	A+PTR	200.23.251.114.ded.telnor.net
200.23.251.182	A	200.23.251.182.ded.telnor.net
200.23.251.222	A	200.23.251.222.ded.telnor.net
200.23.252.2	A+PTR	dns.ruv.itesm.mx
200.23.252.3	A+PTR	dns2.ruv.itesm.mx
200.23.252.4	A	prod05.ruv.itesm.mx
200.23.252.5	A+PTR	prod06ws.ruv.itesm.mx
200.23.252.9	PTR	prod01ws.ruv.itesm.mx
200.23.252.9	A	videotecadigital.itesm.mx
200.23.252.15	A	tecdigital.com.mx
200.23.252.15	A	www.ruv.itesm.mx
200.23.252.15	A	www.uvirtual.com.mx
200.23.252.16	A+PTR	portal.ruv.itesm.mx
200.23.252.17	A+PTR	calendario.ruv.itesm.mx
200.23.252.19	A+PTR	hn.ruv.itesm.mx
200.23.252.24	PTR	dley.ruv.itesm.mx
200.23.252.32	PTR	cervantina.ruv.itesm.mx
200.23.252.32	PTR	ruvruvh2.ruv.itesm.mx
200.23.252.33	PTR	rafaelrangel.info
200.23.252.33	PTR	rafaelrangel.net
200.23.252.33	PTR	rafaelrangel.org
200.23.252.39	A	bb04.tec.com.mx
200.23.252.41	A	pprd04db.ruv.itesm.mx
200.23.252.44	A	info04.ruv.itesm.mx
200.23.252.46	A	demote.tecvirtual.mx
200.23.252.47	A	video.itesm.mx
200.23.252.48	A	polaris.itesm.mx
200.23.252.52	A	correo2.tec.com.mx
200.23.252.53	A+PTR	prod49ws.itesm.mx
200.23.252.53	PTR	sparky.ruv.itesm.mx
200.23.252.56	PTR	circulotec.com.mx
200.23.252.56	PTR	videoteca.itesm.mx
200.23.252.56	PTR	www.tec.com.mx
200.23.252.87	PTR	sata.ruv.itesm.mx
200.23.252.87	PTR	te.ruv.itesm.mx
200.23.252.90	A+PTR	tecvirtual.mx
200.23.252.90	PTR	innovaccion.tecvirtual.mx
200.23.252.90	PTR	www.tecvirtual.mx
200.23.252.116	A+PTR	videoteca.ruv.itesm.mx
200.23.252.171	A+PTR	audio.itesm.mx
200.23.252.171	PTR	uvservicios.ruv.itesm.mx
200.23.252.174	A+PTR	certificados.ruv.itesm.mx
200.23.252.200	A	pprdwebloguv.itesm.mx
200.23.253.201	A+PTR	seres.utm.mx
200.23.253.215	A+PTR	server233.utm.mx
200.23.253.254	A+PTR	router.utm.mx