Robtex

Up: 64.91.56.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 64.91.60.0/23
Down right: 64.91.62.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.91.60.1	PTR	64-91-60-1.stat.centurytel.net
64.91.60.7	PTR	64-91-60-7.stat.centurytel.net
64.91.60.9	A	*.starstreamenterprises.net
64.91.60.9	A	mail.starstreamenterprises.net
64.91.60.9	A	server.starstreamenterprises.net
64.91.60.34	PTR	tqc.net
64.91.60.60	PTR	64-91-60-60.stat.centurytel.net
64.91.60.114	A+PTR	64-91-60-114.stat.centurytel.net
64.91.60.118	PTR	mail.jbursolutions.com
64.91.60.118	A	local.jbursolutions.com
64.91.61.65	PTR	www.waterstreet.biz
64.91.61.65	A	1projectmanager.com
64.91.61.65	A	1leadportal.com
64.91.61.75	A+PTR	64-91-61-75.stat.centurytel.net
64.91.61.104	PTR	64-91-61-104.stat.centurytel.net
64.91.61.104	A	algaeaqua.net
64.91.61.135	A	ns3.montanarockworks.com
64.91.61.137	A	64-91-61-137.stat.centurytel.net
64.91.61.165	PTR	64-91-61-165.stat.centurytel.net
64.91.61.201	PTR	64-91-61-201.stat.centurytel.net
64.91.61.229	A	mail.steelemed.org
64.91.61.230	A	securemail.steelemed.org
64.91.62.1	PTR	64-91-62-1.stat.centurytel.net
64.91.62.18	PTR	64-91-62-18.stat.centurytel.net
64.91.62.47	PTR	64-91-62-47.stat.centurytel.net
64.91.62.77	PTR	64-91-62-77.stat.centurytel.net
64.91.62.162	A+PTR	64-91-62-162.stat.centurytel.net
64.91.63.110	A	combatyoga.net
64.91.63.125	A	mail.centralmt.com
64.91.63.127	A	64-91-63-127.stat.centurytel.net
64.91.63.153	PTR	64-91-63-153.stat.centurytel.net
64.91.63.155	A	sweetsoftail.com
64.91.63.155	A	quicksilverstore.info
64.91.63.155	A	quicksilverstore.com
64.91.63.166	A	sellerdirectrealestate.com
64.91.63.166	A	balancedenergysystems.com
64.91.63.209	PTR	64-91-63-209.stat.centurytel.net
64.91.63.209	A	mail.nelcon.biz
64.91.63.229	PTR	64-91-63-229.stat.centurytel.net