Robtex

Up: 67.58.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 67.58.0.0/20
Down right: 67.58.16.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
67.58.1.1	PTR	1-1-58-67.gci.net
67.58.1.35	PTR	35-1-58-67.gci.net
67.58.2.35	PTR	35-2-58-67.gci.net
67.58.2.195	PTR	195-2-58-67.gci.net
67.58.3.244	A	mail.halquin.net
67.58.9.2	PTR	2-9-58-67.gci.net
67.58.9.130	PTR	130-9-58-67.gci.net
67.58.9.224	PTR	224-9-58-67.gci.net
67.58.12.2	PTR	2-12-58-67.gci.net
67.58.12.33	PTR	33-12-58-67.gci.net
67.58.12.67	PTR	67-12-58-67.gci.net
67.58.12.96	PTR	96-12-58-67.gci.net
67.58.12.129	PTR	129-12-58-67.gci.net
67.58.12.131	PTR	131-12-58-67.gci.net
67.58.12.160	PTR	160-12-58-67.gci.net
67.58.12.193	PTR	193-12-58-67.gci.net
67.58.12.224	PTR	224-12-58-67.gci.net
67.58.12.226	PTR	226-12-58-67.gci.net
67.58.14.226	A	mail.personalphotography.net
67.58.14.230	A	mail.solve-link.com
67.58.19.195	A	mail.bbedc.com
67.58.20.7	A	smtp.choggiung.com
67.58.20.7	A	mail.choggiung.com
67.58.20.178	A	hrmsports.com
67.58.20.178	A	thebristolinnak.com
67.58.20.178	A	thebristolinnalaska.com
67.58.21.79	A	mail.unkira.org
67.58.21.79	A	unkira.org
67.58.25.1	PTR	1-25-58-67.gci.net
67.58.30.34	PTR	34-30-58-67.gci.net
67.58.30.96	PTR	96-30-58-67.gci.net
67.58.30.98	PTR	98-30-58-67.gci.net
67.58.30.131	PTR	131-30-58-67.gci.net
67.58.30.161	PTR	161-30-58-67.gci.net
67.58.30.162	PTR	162-30-58-67.gci.net
67.58.30.163	PTR	163-30-58-67.gci.net
67.58.30.192	PTR	192-30-58-67.gci.net
67.58.30.195	PTR	195-30-58-67.gci.net
67.58.30.225	PTR	225-30-58-67.gci.net
67.58.30.226	PTR	226-30-58-67.gci.net
67.58.30.227	PTR	227-30-58-67.gci.net