Robtex

Up: 206.191.192.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 206.191.192.0/20
Down right: 206.191.208.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
206.191.192.2	PTR	tahoe3.spacestar.net
206.191.192.2	A	dns.spacestar.net
206.191.192.2	A	ns1.sierranv.net
206.191.192.4	PTR	telephony.sierranv.net
206.191.192.30	A	smtp.spacestar.net
206.191.192.30	A	mail.spacestar.net
206.191.192.30	A	pop3.spacestar.net
206.191.192.50	A+PTR	mail.spacestar.net
206.191.192.50	A	smtp.spacestar.net
206.191.192.50	A	pop3.spacestar.net
206.191.192.65	PTR	opus.sharpelink.com
206.191.192.253	PTR	switch3.eden.spacestar.net
206.191.193.1	PTR	web1.spacestar.net
206.191.193.1	A	homeloanconsulting.com
206.191.193.81	A	wimpjunction.com
206.191.193.81	A	nuspeed.net
206.191.194.1	PTR	web1.sierranv.net
206.191.194.1	A	www.syal.com
206.191.194.1	A	grishamconsultingservices.com
206.191.194.20	PTR	bartable9ball.com
206.191.194.21	PTR	ts5-6.riverfalls.spacestar.net
206.191.194.100	PTR	ns1.vitexcom.com
206.191.194.100	A	mail.jimmyspats.net
206.191.194.101	PTR	ns2.vitexcom.com
206.191.194.101	A	mail.powerfireworks.com
206.191.194.101	A	benmcgrail.com
206.191.195.10	A+PTR	mail.icesusa.org
206.191.195.10	A	icesusa.net
206.191.195.10	A	mail.icesusa.net
206.191.195.12	A	mail.icesusa.org
206.191.195.17	A	vee.com
206.191.197.242	PTR	web3.sierranv.net
206.191.197.242	A	mail.neo-populism.com
206.191.197.242	A	mail.talkinghead.biz
206.191.197.250	PTR	dns1.spacestar.net
206.191.199.3	PTR	smtp.transomamedical.com
206.191.199.3	A	jimnelson.info
206.191.203.217	PTR	marquetteplaza.com
206.191.211.253	A	mail.meadowcreek.pvt.k12.mn.us
206.191.211.253	A	meadowcreek.pvt.k12.mn.us
206.191.214.3	A+PTR	mail.lakeville.k12.mn.us
206.191.220.146	PTR	svr67.evolvingsol.com