Robtex

Up: 66.208.136.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 66.208.140.0/23
Down right: 66.208.142.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
66.208.140.1	PTR	66-208-140-1.arpa.kmcmail.net
66.208.140.35	PTR	66-208-140-35.arpa.kmcmail.net
66.208.140.56	PTR	66-208-140-56.arpa.kmcmail.net
66.208.140.58	PTR	66-208-140-58.arpa.kmcmail.net
66.208.140.58	A	redballtgs.com
66.208.140.99	PTR	66-208-140-99.arpa.kmcmail.net
66.208.140.114	PTR	66-208-140-114.arpa.kmcmail.net
66.208.140.124	PTR	66-208-140-124.arpa.kmcmail.net
66.208.140.124	A	mail.s3pumpservice.com
66.208.141.11	PTR	66-208-141-11.arpa.kmcmail.net
66.208.141.118	PTR	autodiscover.afs.net
66.208.141.167	PTR	66-208-141-167.arpa.kmcmail.net
66.208.141.214	PTR	66-208-141-214.arpa.kmcmail.net
66.208.142.50	A	mail.hoganhardwoods.com
66.208.142.50	A	mail.accesshoganhardwoods.com
66.208.142.50	A	stewie.accesshoganhardwoods.com
66.208.142.232	PTR	66-208-142-232.arpa.kmcmail.net
66.208.142.232	A	barracuda.central-oil.com
66.208.142.243	PTR	66-208-142-243.arpa.kmcmail.net
66.208.142.243	A	exchange.moonbotstudios.com
66.208.143.2	A	dnsp.caddo.k12.la.us
66.208.143.5	A+PTR	dnsp01.caddoschools.org
66.208.143.6	A+PTR	dnsp02.caddoschools.org
66.208.143.16	A	mail.caddo.k12.la.us
66.208.143.17	A	mail.caddoschools.org
66.208.143.19	A+PTR	ftp2.caddoschools.org
66.208.143.19	A	ftp2.caddo.k12.la.us
66.208.143.20	A+PTR	jgrade.caddoschools.org
66.208.143.22	PTR	81street.caddoschools.org
66.208.143.22	PTR	accounting.caddoschools.org
66.208.143.22	PTR	adultprog.caddoschools.org
66.208.143.26	A+PTR	destiny.caddoschools.org
66.208.143.26	A	destiny.caddo.k12.la.us
66.208.143.41	A+PTR	remote.caddoschools.org
66.208.143.41	A+PTR	moodle.caddoschools.org
66.208.143.111	A	webmail1.caddoschools.org