Robtex

Up: 66.160.192.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 66.160.208.0/21
Down right: 66.160.216.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.160.208.0	PTR	client-66.160.208.0.tx.skybeam.com
66.160.208.6	A	xzen1.aircanopy.net
66.160.208.11	A	client-66.160.208.11.tx.skybeam.com
66.160.208.15	A	jabwireless.com
66.160.208.15	A	skybeam-digis.com
66.160.208.18	A+PTR	backup.aircanopy.net
66.160.208.22	A	barracuda.aircanopy.net
66.160.208.27	A	zh1.aircanopy.net
66.160.208.43	A	ns4.aircanopy.net
66.160.208.45	A	xdns3.aircanopy.net
66.160.208.48	A	client-66.160.208.48.tx.skybeam.com
66.160.208.160	A	colab.aircanopy.com
66.160.208.165	A	mail.venusisd.net
66.160.208.177	A+PTR	mail.dot11net.com
66.160.208.177	A	mail.joshuabroadband.com
66.160.208.177	A	mail.crowleybroadband.com
66.160.208.201	A	barracuda.skybeamtx.com
66.160.208.210	A	mail.whereismysupersuit.com
66.160.208.214	A	ib0.txd.skybeam.net
66.160.208.252	A	ns1.aircanopy.net
66.160.208.252	A	client-66.160.208.252.tx.skybeam.com
66.160.208.254	A	scripting.skybeamtx.com
66.160.209.46	A	client-66.160.209.46.tx.skybeam.com
66.160.209.162	A+PTR	client-66.160.209.162.tx.skybeam.com
66.160.211.7	A+PTR	client-66.160.211.7.tx.skybeam.com
66.160.211.86	A	client-66.160.211.86.tx.skybeam.com
66.160.211.154	A+PTR	client-66.160.211.154.tx.skybeam.com
66.160.211.172	A+PTR	client-66.160.211.172.tx.skybeam.com
66.160.212.39	A	client-66.160.212.39.tx.skybeam.com
66.160.213.165	A+PTR	client-66.160.213.165.tx.skybeam.com
66.160.213.167	A+PTR	client-66.160.213.167.tx.skybeam.com
66.160.213.167	A	elliscountyemporium.com
66.160.213.167	A	mail.elliscountyemporium.com
66.160.213.185	A+PTR	client-66.160.213.185.tx.skybeam.com
66.160.213.204	A+PTR	client-66.160.213.204.tx.skybeam.com
66.160.213.254	A+PTR	client-66.160.213.254.tx.skybeam.com
66.160.215.62	A+PTR	client-66.160.215.62.tx.skybeam.com
66.160.215.172	A+PTR	client-66.160.215.172.tx.skybeam.com
66.160.216.65	A	adaptivenet.com
66.160.216.95	A+PTR	client-66.160.216.95.tx.skybeam.com
66.160.217.4	PTR	mail.co.ellis.tx.us
66.160.217.14	A	rodriguetx.com
66.160.218.58	A	client-66.160.218.58.tx.skybeam.com
66.160.218.133	A+PTR	client-66.160.218.133.tx.skybeam.com
66.160.219.17	A+PTR	client-66.160.219.17.tx.skybeam.com
66.160.219.17	A	dfwcg.com
66.160.219.17	A	mail.dfwcg.com
66.160.219.33	A+PTR	client-66.160.219.33.tx.skybeam.com
66.160.219.171	A+PTR	client-66.160.219.171.tx.skybeam.com
66.160.219.198	A+PTR	client-66.160.219.198.tx.skybeam.com
66.160.220.44	A+PTR	client-66.160.220.44.tx.skybeam.com
66.160.220.71	A+PTR	client-66.160.220.71.tx.skybeam.com
66.160.220.83	A+PTR	client-66.160.220.83.tx.skybeam.com
66.160.220.100	A+PTR	client-66.160.220.100.tx.skybeam.com
66.160.220.162	A+PTR	client-66.160.220.162.tx.skybeam.com
66.160.220.204	A+PTR	client-66.160.220.204.tx.skybeam.com
66.160.222.0	A+PTR	client-66.160.222.0.tx.skybeam.com
66.160.222.76	A+PTR	client-66.160.222.76.tx.skybeam.com
66.160.223.165	A+PTR	client-66.160.223.165.tx.skybeam.com
66.160.223.165	A	ace-enviro.com
66.160.223.255	PTR	client-66.160.223.255.tx.skybeam.com