Robtex

Up: 69.25.44.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 69.25.45.0/25
Down right: 69.25.45.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
69.25.45.4	A+PTR	fw1.hrn.k12.com
69.25.45.6	PTR	gtwy.hrn.k12.com
69.25.45.9	PTR	dev-mobile.k12.com
69.25.45.17	A+PTR	webcallback.k12.com
69.25.45.20	A+PTR	acs1.hrn.k12.com
69.25.45.21	A+PTR	acs2.hrn.k12.com
69.25.45.38	PTR	hrnsplash.k12.com
69.25.45.38	A	ns.hrn.k12.com
69.25.45.39	PTR	ts.k12.com
69.25.45.39	A	vip39.hrn.k12.com
69.25.45.40	A+PTR	webmail.k12.com
69.25.45.41	A+PTR	smtpr-hrn1.k12.com
69.25.45.42	A+PTR	smtp2.k-12.com
69.25.45.42	A	mail.wyva.net
69.25.45.42	A	smtp2.utahvirtual.org
69.25.45.44	PTR	smtp4.k-12.com
69.25.45.44	A	smtp4.arvs.org
69.25.45.44	A	smtp4.k12912.net
69.25.45.45	A+PTR	smtpr1.k12.com
69.25.45.45	A+PTR	mx1.online.k12.com
69.25.45.45	A+PTR	mx1.info.k12.com
69.25.45.46	A+PTR	smtpr2.k12.com
69.25.45.46	A	smtpr2.k12dev.com
69.25.45.46	A	mx2.online.k12.com
69.25.45.47	A+PTR	axiomdev.k12.com
69.25.45.48	A+PTR	axiomqa.k12.com
69.25.45.48	A	axiom.k12.com
69.25.45.50	A+PTR	smtpr3.k12.com
69.25.45.53	A+PTR	hrn-essay-ftp-1.k12.com
69.25.45.54	A+PTR	ns1.k12.com
69.25.45.54	A	ns1.k-12.net
69.25.45.54	A	ns1.k-12.org
69.25.45.55	A+PTR	ns2.k12.com
69.25.45.56	PTR	demo.k12.com
69.25.45.58	PTR	trn-calms.k12.com
69.25.45.62	PTR	smtpr-hrn2.k12.com
69.25.45.68	PTR	qaweb2.k12.com
69.25.45.69	PTR	pd-confluence.k12.com
69.25.45.70	PTR	trncalmsbus.k12.com
69.25.45.75	PTR	lyncweb.k12.com
69.25.45.78	PTR	mrktsvn.k12.com
69.25.45.82	PTR	smtp5.k-12.com
69.25.45.82	A	smtp5.icademy.com
69.25.45.82	A	smtp5.mglva.org
69.25.45.88	A	smtp5.flexsf.com
69.25.45.88	A	smtp4.flexsf.com
69.25.45.101	PTR	kcdl-confluence.k12.com
69.25.45.102	PTR	docushare.k12.com
69.25.45.103	PTR	kcdl-jira.k12.com
69.25.45.105	PTR	m2.k12.com
69.25.45.106	PTR	password.k12.com
69.25.45.107	PTR	teacherhelp.k12.com
69.25.45.109	PTR	confluence.k12.com
69.25.45.110	PTR	pd-qa-confluence.k12.com
69.25.45.111	PTR	mail.k12dev.com
69.25.45.115	PTR	smtp.k12dev.com
69.25.45.115	A	k12dev.com
69.25.45.118	PTR	testintranet.k12.com
69.25.45.119	PTR	trn-mediasrv.k12.com
69.25.45.122	PTR	docushare-qa.k12.com
69.25.45.123	A+PTR	dev-nrg.k12.com
69.25.45.126	PTR	qasams.k12.com
69.25.45.135	PTR	pdftp.k12.com
69.25.45.145	A+PTR	mail.k12.com
69.25.45.152	PTR	mcafee.k12.com
69.25.45.154	PTR	ctx.k12.com
69.25.45.157	PTR	autodiscover.k12.com
69.25.45.194	PTR	qa-irt.k12.com
69.25.45.197	PTR	test1-directory.k12.com
69.25.45.198	PTR	test1-directoryctl.k12.com
69.25.45.199	PTR	qa-publisherbus.k12.com
69.25.45.205	PTR	qa-mobile.k12.com
69.25.45.206	PTR	qa-ebssvc.k12.com
69.25.45.210	PTR	stage-marketing.k12.com
69.25.45.212	PTR	qa-lms.k12.com
69.25.45.213	PTR	qa-classconnect.k12.com
69.25.45.214	PTR	qa-omssvc.k12.com
69.25.45.215	PTR	qa-calms.k12.com
69.25.45.216	PTR	qacalmsbus.k12.com
69.25.45.217	PTR	qa-testcalms.k12.com
69.25.45.219	PTR	qa-lms-fms.k12.com
69.25.45.220	A+PTR	qa-lmsmediaserver.k12.com
69.25.45.221	A+PTR	qatest1.k12.com
69.25.45.221	A	qa-accessui.k12.com
69.25.45.221	A	qa-enroll.k12.com
69.25.45.236	PTR	lyncdiscover.k12.com
69.25.45.236	A+PTR	discoverlync.k12.com
69.25.45.236	PTR	hrn-prod-owas1.k12.com
69.25.45.248	PTR	mail.k-12.com
69.25.45.249	PTR	autodiscover.k-12.com