Robtex

Up: 64.172.128.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 64.172.128.0/21
Down right: 64.172.136.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.172.128.0	PTR	adsl-64-172-128-0.dsl.sktn01.pacbell.net
64.172.128.3	PTR	adsl-64-172-128-3.dsl.sktn01.pacbell.net
64.172.128.16	PTR	adsl-64-172-128-16.dsl.sktn01.pacbell.net
64.172.128.17	PTR	adsl-64-172-128-17.dsl.sktn01.pacbell.net
64.172.128.31	A	adsl-64-172-128-31.dsl.sktn01.pacbell.net
64.172.128.35	PTR	adsl-64-172-128-35.dsl.sktn01.pacbell.net
64.172.128.50	PTR	adsl-64-172-128-50.dsl.sktn01.pacbell.net
64.172.128.51	PTR	adsl-64-172-128-51.dsl.sktn01.pacbell.net
64.172.128.67	PTR	adsl-64-172-128-67.dsl.sktn01.pacbell.net
64.172.128.81	PTR	adsl-64-172-128-81.dsl.sktn01.pacbell.net
64.172.128.97	PTR	adsl-64-172-128-97.dsl.sktn01.pacbell.net
64.172.128.112	PTR	adsl-64-172-128-112.dsl.sktn01.pacbell.net
64.172.128.128	PTR	adsl-64-172-128-128.dsl.sktn01.pacbell.net
64.172.128.132	A	adsl-64-172-128-132.dsl.sktn01.pacbell.net
64.172.128.160	PTR	adsl-64-172-128-160.dsl.sktn01.pacbell.net
64.172.128.162	PTR	adsl-64-172-128-162.dsl.sktn01.pacbell.net
64.172.128.163	PTR	adsl-64-172-128-163.dsl.sktn01.pacbell.net
64.172.128.194	PTR	adsl-64-172-128-194.dsl.sktn01.pacbell.net
64.172.128.224	PTR	adsl-64-172-128-224.dsl.sktn01.pacbell.net
64.172.128.225	PTR	adsl-64-172-128-225.dsl.sktn01.pacbell.net
64.172.128.241	PTR	adsl-64-172-128-241.dsl.sktn01.pacbell.net
64.172.128.242	PTR	adsl-64-172-128-242.dsl.sktn01.pacbell.net
64.172.136.5	A	adsl-64-172-136-5.dsl.sktn01.pacbell.net
64.172.136.8	A	adsl-64-172-136-8.dsl.sktn01.pacbell.net
64.172.136.18	A+PTR	adsl-64-172-136-18.dsl.sktn01.pacbell.net
64.172.136.19	A+PTR	adsl-64-172-136-19.dsl.sktn01.pacbell.net
64.172.136.45	A	adsl-64-172-136-45.dsl.sktn01.pacbell.net
64.172.136.46	A	adsl-64-172-136-46.dsl.sktn01.pacbell.net
64.172.136.50	A+PTR	adsl-64-172-136-50.dsl.sktn01.pacbell.net
64.172.136.54	A	adsl-64-172-136-54.dsl.sktn01.pacbell.net
64.172.136.55	A	adsl-64-172-136-55.dsl.sktn01.pacbell.net
64.172.136.60	A	adsl-64-172-136-60.dsl.sktn01.pacbell.net
64.172.136.64	A+PTR	adsl-64-172-136-64.dsl.sktn01.pacbell.net
64.172.136.68	A	adsl-64-172-136-68.dsl.sktn01.pacbell.net
64.172.136.83	A+PTR	adsl-64-172-136-83.dsl.sktn01.pacbell.net
64.172.136.86	A	adsl-64-172-136-86.dsl.sktn01.pacbell.net
64.172.136.96	A+PTR	adsl-64-172-136-96.dsl.sktn01.pacbell.net
64.172.136.97	A+PTR	adsl-64-172-136-97.dsl.sktn01.pacbell.net
64.172.136.100	A	adsl-64-172-136-100.dsl.sktn01.pacbell.net
64.172.136.119	A	adsl-64-172-136-119.dsl.sktn01.pacbell.net
64.172.136.122	A	adsl-64-172-136-122.dsl.sktn01.pacbell.net
64.172.136.124	A	adsl-64-172-136-124.dsl.sktn01.pacbell.net
64.172.136.140	A	adsl-64-172-136-140.dsl.sktn01.pacbell.net
64.172.136.156	A	adsl-64-172-136-156.dsl.sktn01.pacbell.net
64.172.136.158	A	adsl-64-172-136-158.dsl.sktn01.pacbell.net
64.172.136.162	A+PTR	adsl-64-172-136-162.dsl.sktn01.pacbell.net
64.172.136.165	A	adsl-64-172-136-165.dsl.sktn01.pacbell.net
64.172.136.173	A	adsl-64-172-136-173.dsl.sktn01.pacbell.net
64.172.136.174	A	adsl-64-172-136-174.dsl.sktn01.pacbell.net
64.172.136.197	A	adsl-64-172-136-197.dsl.sktn01.pacbell.net
64.172.136.206	A	adsl-64-172-136-206.dsl.sktn01.pacbell.net
64.172.136.210	PTR	adsl-64-172-136-210.lan-x.net
64.172.136.241	A+PTR	adsl-64-172-136-241.dsl.sktn01.pacbell.net
64.172.136.246	A	adsl-64-172-136-246.dsl.sktn01.pacbell.net
64.172.136.247	A	adsl-64-172-136-247.dsl.sktn01.pacbell.net
64.172.138.54	A	www.bjmglobal.com
64.172.139.81	A	adsl-64-172-139-81.dsl.sktn01.pacbell.net
64.172.139.147	A	mail.keytrix.com
64.172.139.224	A	adsl-64-172-139-224.dsl.sktn01.pacbell.net
64.172.139.225	A	adsl-64-172-139-225.dsl.sktn01.pacbell.net
64.172.140.168	A	hi-teccrm.com
64.172.141.20	A	sjgov.info
64.172.141.21	A	mail.sjgov.info
64.172.142.1	PTR	64-172-142-1.sjgov.org
64.172.142.4	PTR	64-172-142-4.sjgov.org
64.172.142.6	A	www.sjcbhs.org
64.172.142.6	A	*.sjcbhs.org
64.172.142.6	A	sjcbhs.org
64.172.142.25	A	sjmhsa.net
64.172.142.26	A	bhscbo.net
64.172.142.26	A	mail.bhscbo.net
64.172.142.32	PTR	64-172-142-32.sjgov.org
64.172.142.40	A	sjgh.org
64.172.142.40	A	www.sjgh.org
64.172.142.41	A	mail.sjgh.org
64.172.142.42	A	owa.sjgh.org
64.172.142.59	A	zixvpm.sjgh.org