Robtex

Up: 204.14.12.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 204.14.12.0/25
Down right: 204.14.12.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
204.14.12.2	A+PTR	globnat.caiu.org
204.14.12.2	A	exchange.caiu.org
204.14.12.5	A+PTR	vpn.caiu.org
204.14.12.19	PTR	nat.cpavts.org
204.14.12.20	A+PTR	mail.cpavts.org
204.14.12.34	A+PTR	lynx.hasd.us
204.14.12.34	A+PTR	mail1.hasd.us
204.14.12.34	PTR	webmail.hasd.us
204.14.12.36	A	autodiscover.hasd.us
204.14.12.36	A	owa.hasd.us
204.14.12.36	A	mail.hasd.us
204.14.12.38	A+PTR	ihost.hasd.us
204.14.12.54	A+PTR	hsmail.shsd.k12.pa.us
204.14.12.73	A+PTR	mail.mlbgsd.k12.pa.us
204.14.12.73	PTR	mail1.mlbgsd.k12.pa.us
204.14.12.83	A+PTR	compass.bigspring.k12.pa.us
204.14.12.87	A	bigspring.k12.pa.us
204.14.12.88	A+PTR	citrix.bigspring.k12.pa.us
204.14.12.94	A	exchange.bigspring.k12.pa.us
204.14.12.94	A	mail.bigspring.k12.pa.us
204.14.12.98	A	mail2.greenwoodsd.org
204.14.12.99	A	mail.greenwoodsd.org
204.14.12.100	A+PTR	webmail.greenwoodsd.org
204.14.12.101	A	lunchbox.greenwoodsd.org
204.14.12.105	A	owa.greenwoodsd.org
204.14.12.115	A+PTR	mail.dcts.org
204.14.12.146	A+PTR	barracuda1.ship.k12.pa.us
204.14.12.146	A	barracuda1.shipsd.org
204.14.12.151	A	dns2.shipsd.org
204.14.12.151	A	dns2.ship.k12.pa.us
204.14.12.153	A	dns1.ship.k12.pa.us
204.14.12.153	A	dns1.shipsd.org
204.14.12.154	A+PTR	barracuda.ship.k12.pa.us
204.14.12.171	A+PTR	autodiscover.camphillsd.k12.pa.us
204.14.12.171	PTR	webmail.camphillsd.k12.pa.us
204.14.12.179	A+PTR	mail.psba.org
204.14.12.185	A	psbainsurancetrust.com
204.14.12.203	A+PTR	mail.hannasd.org
204.14.12.203	A	vega.hannasd.k12.pa.us
204.14.12.204	A	arcturus.hannasd.k12.pa.us
204.14.12.204	A	hannaweb.org
204.14.12.233	A+PTR	spam1.newportsd.org