Robtex

Up: 172.245.48.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 172.245.48.0/24
Down right: 172.245.49.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
172.245.48.1	PTR	host.colocrossing.com
172.245.48.10	PTR	172-245-48-10-host.colocrossing.com
172.245.48.14	PTR	host.colocrossing.com
172.245.48.31	PTR	172-245-48-31-host.colocrossing.com
172.245.48.32	PTR	172-245-48-32-host.colocrossing.com
172.245.48.42	PTR	172-245-48-42-host.colocrossing.com
172.245.48.46	PTR	172-245-48-46-host.colocrossing.com
172.245.48.54	PTR	host.colocrossing.com
172.245.48.60	PTR	host.colocrossing.com
172.245.48.69	PTR	172-245-48-69-host.colocrossing.com
172.245.48.85	PTR	host.colocrossing.com
172.245.48.107	PTR	172-245-48-107-host.colocrossing.com
172.245.48.137	PTR	host.colocrossing.com
172.245.48.162	PTR	host.colocrossing.com
172.245.48.168	PTR	host.colocrossing.com
172.245.48.180	PTR	172-245-48-180-host.colocrossing.com
172.245.48.213	PTR	172-245-48-213-host.colocrossing.com
172.245.48.238	PTR	172-245-48-238-host.colocrossing.com
172.245.49.66	A	coxcombablepar.com
172.245.49.66	A	uletplanarilyl.com
172.245.49.66	A	ldallssinewing.com
172.245.49.125	PTR	172-245-49-125-host.colocrossing.com
172.245.49.155	PTR	172-245-49-155-host.colocrossing.com
172.245.49.163	PTR	172-245-49-163-host.colocrossing.com
172.245.49.177	PTR	172-245-49-177-host.colocrossing.com
172.245.49.180	PTR	172-245-49-180-host.colocrossing.com
172.245.49.192	PTR	172-245-49-192-host.colocrossing.com
172.245.49.194	PTR	172-245-49-194-host.colocrossing.com
172.245.49.197	PTR	172-245-49-197-host.colocrossing.com
172.245.49.200	PTR	172-245-49-200-host.colocrossing.com
172.245.49.209	A	dollarincentive.com
172.245.49.210	PTR	172-245-49-210-host.colocrossing.com
172.245.49.210	A	res.dollarincentive.com
172.245.49.254	A	nac.insureurlife.com