Robtex

Up: 64.248.72.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 64.248.76.0/23
Down right: 64.248.78.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.248.76.114	A	mail.wesimonfoundation.org
64.248.77.70	A	pet-authority.com.2.0001.arsmtp.com
64.248.77.70	A	dynamic-health.com.1.0001.arsmtp.com
64.248.77.70	A	mail.dynamichealth.com
64.248.78.22	A	64-248-78-22.client.dsl.net
64.248.79.0	A+PTR	64-248-79-0.client.dsl.net
64.248.79.4	A+PTR	64-248-79-4.client.dsl.net
64.248.79.5	A+PTR	64-248-79-5.client.dsl.net
64.248.79.10	A+PTR	64-248-79-10.client.dsl.net
64.248.79.21	A+PTR	64-248-79-21.client.dsl.net
64.248.79.24	A+PTR	64-248-79-24.client.dsl.net
64.248.79.30	A+PTR	64-248-79-30.client.dsl.net
64.248.79.33	A+PTR	64-248-79-33.client.dsl.net
64.248.79.36	A+PTR	64-248-79-36.client.dsl.net
64.248.79.38	A+PTR	64-248-79-38.client.dsl.net
64.248.79.40	A+PTR	64-248-79-40.client.dsl.net
64.248.79.45	A+PTR	64-248-79-45.client.dsl.net
64.248.79.48	A+PTR	64-248-79-48.client.dsl.net
64.248.79.60	A+PTR	64-248-79-60.client.dsl.net
64.248.79.61	A+PTR	64-248-79-61.client.dsl.net
64.248.79.71	A+PTR	64-248-79-71.client.dsl.net
64.248.79.72	A+PTR	64-248-79-72.client.dsl.net
64.248.79.76	A+PTR	64-248-79-76.client.dsl.net
64.248.79.79	A+PTR	64-248-79-79.client.dsl.net
64.248.79.80	A+PTR	64-248-79-80.client.dsl.net
64.248.79.81	A+PTR	64-248-79-81.client.dsl.net
64.248.79.89	A+PTR	64-248-79-89.client.dsl.net
64.248.79.91	A+PTR	64-248-79-91.client.dsl.net
64.248.79.98	A+PTR	64-248-79-98.client.dsl.net
64.248.79.104	A+PTR	64-248-79-104.client.dsl.net
64.248.79.109	A+PTR	64-248-79-109.client.dsl.net
64.248.79.114	A+PTR	64-248-79-114.client.dsl.net
64.248.79.122	A+PTR	64-248-79-122.client.dsl.net
64.248.79.124	A+PTR	64-248-79-124.client.dsl.net
64.248.79.125	A+PTR	64-248-79-125.client.dsl.net
64.248.79.135	A+PTR	64-248-79-135.client.dsl.net
64.248.79.139	A+PTR	64-248-79-139.client.dsl.net
64.248.79.141	A+PTR	64-248-79-141.client.dsl.net
64.248.79.144	A+PTR	64-248-79-144.client.dsl.net
64.248.79.145	A+PTR	64-248-79-145.client.dsl.net
64.248.79.154	A+PTR	64-248-79-154.client.dsl.net
64.248.79.160	A+PTR	64-248-79-160.client.dsl.net
64.248.79.163	A+PTR	64-248-79-163.client.dsl.net
64.248.79.167	A+PTR	64-248-79-167.client.dsl.net
64.248.79.169	A+PTR	64-248-79-169.client.dsl.net
64.248.79.174	A+PTR	64-248-79-174.client.dsl.net
64.248.79.176	A+PTR	64-248-79-176.client.dsl.net
64.248.79.177	A+PTR	64-248-79-177.client.dsl.net
64.248.79.182	A+PTR	64-248-79-182.client.dsl.net
64.248.79.184	A+PTR	64-248-79-184.client.dsl.net
64.248.79.186	A+PTR	64-248-79-186.client.dsl.net
64.248.79.187	A+PTR	64-248-79-187.client.dsl.net
64.248.79.189	A+PTR	64-248-79-189.client.dsl.net
64.248.79.192	A+PTR	64-248-79-192.client.dsl.net
64.248.79.194	A+PTR	64-248-79-194.client.dsl.net
64.248.79.202	A+PTR	64-248-79-202.client.dsl.net
64.248.79.204	A+PTR	64-248-79-204.client.dsl.net
64.248.79.205	A+PTR	64-248-79-205.client.dsl.net
64.248.79.208	A+PTR	64-248-79-208.client.dsl.net
64.248.79.210	A+PTR	64-248-79-210.client.dsl.net
64.248.79.213	A+PTR	64-248-79-213.client.dsl.net
64.248.79.219	A+PTR	64-248-79-219.client.dsl.net
64.248.79.220	A+PTR	64-248-79-220.client.dsl.net
64.248.79.222	A+PTR	64-248-79-222.client.dsl.net
64.248.79.224	A+PTR	64-248-79-224.client.dsl.net
64.248.79.231	A+PTR	64-248-79-231.client.dsl.net
64.248.79.233	A+PTR	64-248-79-233.client.dsl.net
64.248.79.239	A+PTR	64-248-79-239.client.dsl.net
64.248.79.240	A+PTR	64-248-79-240.client.dsl.net
64.248.79.242	A+PTR	64-248-79-242.client.dsl.net
64.248.79.245	A+PTR	64-248-79-245.client.dsl.net
64.248.79.250	A+PTR	64-248-79-250.client.dsl.net
64.248.79.253	A+PTR	64-248-79-253.client.dsl.net