Robtex

Up: 208.72.192.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 208.72.192.0/22
Down right: 208.72.196.0/22

IP	Type	Hostname
208.72.192.1	PTR	rtr-01.sfo.bittorrent.com
208.72.192.3	PTR	ip-208-72-192-3.bittorrent.com
208.72.192.8	PTR	ip-208-72-192-8.bittorrent.com
208.72.192.13	A	ip-208-72-192-13.bittorrent.com
208.72.192.16	A+PTR	ip-208-72-192-16.bittorrent.com
208.72.192.18	PTR	ip-208-72-192-18.bittorrent.com
208.72.192.19	A+PTR	ip-208-72-192-19.bittorrent.com
208.72.192.20	A	ip-208-72-192-20.bittorrent.com
208.72.192.23	A	ip-208-72-192-23.bittorrent.com
208.72.192.25	PTR	ip-208-72-192-25.bittorrent.com
208.72.192.32	A+PTR	ip-208-72-192-32.bittorrent.com
208.72.192.34	PTR	ip-208-72-192-34.bittorrent.com
208.72.192.40	A+PTR	ip-208-72-192-40.bittorrent.com
208.72.192.41	PTR	ip-208-72-192-41.bittorrent.com
208.72.192.48	PTR	ip-208-72-192-48.bittorrent.com
208.72.192.49	PTR	ip-208-72-192-49.bittorrent.com
208.72.192.51	PTR	ip-208-72-192-51.bittorrent.com
208.72.192.54	A	ip-208-72-192-54.bittorrent.com
208.72.192.57	PTR	ip-208-72-192-57.bittorrent.com
208.72.192.59	A+PTR	ip-208-72-192-59.bittorrent.com
208.72.192.64	PTR	ip-208-72-192-64.bittorrent.com
208.72.192.65	PTR	ip-208-72-192-65.bittorrent.com
208.72.192.67	PTR	ip-208-72-192-67.bittorrent.com
208.72.192.72	PTR	ip-208-72-192-72.bittorrent.com
208.72.192.74	PTR	ip-208-72-192-74.bittorrent.com
208.72.192.75	A+PTR	ip-208-72-192-75.bittorrent.com
208.72.192.81	PTR	ip-208-72-192-81.bittorrent.com
208.72.192.83	PTR	ip-208-72-192-83.bittorrent.com
208.72.192.91	A+PTR	ip-208-72-192-91.bittorrent.com
208.72.192.96	PTR	ip-208-72-192-96.bittorrent.com
208.72.192.97	PTR	ip-208-72-192-97.bittorrent.com
208.72.192.98	A+PTR	ip-208-72-192-98.bittorrent.com
208.72.192.100	A	ip-208-72-192-100.bittorrent.com
208.72.192.101	A	ip-208-72-192-101.bittorrent.com
208.72.192.104	PTR	ip-208-72-192-104.bittorrent.com
208.72.192.106	PTR	ip-208-72-192-106.bittorrent.com
208.72.192.107	PTR	ip-208-72-192-107.bittorrent.com
208.72.192.112	A+PTR	ip-208-72-192-112.bittorrent.com
208.72.192.121	PTR	ip-208-72-192-121.bittorrent.com
208.72.192.128	A+PTR	ip-208-72-192-128.bittorrent.com
208.72.192.129	A+PTR	ip-208-72-192-129.bittorrent.com
208.72.192.130	PTR	ip-208-72-192-130.bittorrent.com
208.72.192.133	A	public.bittorrent.com
208.72.192.133	A	ip-208-72-192-133.bittorrent.com
208.72.192.137	PTR	ip-208-72-192-137.bittorrent.com
208.72.192.138	PTR	ip-208-72-192-138.bittorrent.com
208.72.192.140	A	ip-208-72-192-140.bittorrent.com
208.72.192.145	PTR	ip-208-72-192-145.bittorrent.com
208.72.192.147	PTR	ip-208-72-192-147.bittorrent.com
208.72.192.153	PTR	ip-208-72-192-153.bittorrent.com
208.72.192.156	A	ip-208-72-192-156.bittorrent.com
208.72.192.156	A	ens-05.bittorrent.com
208.72.192.156	A	ens-02.bittorrent.com
208.72.192.157	A	ip-208-72-192-157.bittorrent.com
208.72.192.160	A+PTR	ip-208-72-192-160.bittorrent.com
208.72.192.161	PTR	ip-208-72-192-161.bittorrent.com
208.72.192.163	A	s8213.up.bittorrent.com
208.72.192.164	A	ip-208-72-192-164.bittorrent.com
208.72.192.165	A	ip-208-72-192-165.bittorrent.com
208.72.192.168	A+PTR	ip-208-72-192-168.bittorrent.com
208.72.192.170	PTR	ip-208-72-192-170.bittorrent.com
208.72.192.171	PTR	ip-208-72-192-171.bittorrent.com
208.72.192.176	PTR	ip-208-72-192-176.bittorrent.com
208.72.192.176	A	ens-07.bittorrent.com
208.72.192.177	A+PTR	ip-208-72-192-177.bittorrent.com
208.72.192.177	A	dns-02.bittorrent.com
208.72.192.178	PTR	ip-208-72-192-178.bittorrent.com
208.72.192.178	A	dns-03.bittorrent.com
208.72.192.179	PTR	ip-208-72-192-179.bittorrent.com
208.72.192.184	PTR	ip-208-72-192-184.bittorrent.com
208.72.192.190	A	ip-208-72-192-190.bittorrent.com
208.72.192.192	PTR	ip-208-72-192-192.bittorrent.com
208.72.192.193	PTR	ip-208-72-192-193.bittorrent.com
208.72.192.194	PTR	ip-208-72-192-194.bittorrent.com
208.72.192.195	A+PTR	ip-208-72-192-195.bittorrent.com
208.72.192.197	A	ip-208-72-192-197.bittorrent.com
208.72.192.199	A	ip-208-72-192-199.bittorrent.com
208.72.192.200	PTR	ip-208-72-192-200.bittorrent.com
208.72.192.203	PTR	ip-208-72-192-203.bittorrent.com
208.72.192.204	A	ip-208-72-192-204.bittorrent.com
208.72.192.209	PTR	ip-208-72-192-209.bittorrent.com
208.72.192.210	PTR	ip-208-72-192-210.bittorrent.com
208.72.192.211	PTR	ip-208-72-192-211.bittorrent.com
208.72.192.216	A+PTR	ip-208-72-192-216.bittorrent.com
208.72.192.217	PTR	ip-208-72-192-217.bittorrent.com
208.72.192.218	PTR	ip-208-72-192-218.bittorrent.com
208.72.192.219	PTR	ip-208-72-192-219.bittorrent.com
208.72.192.227	PTR	ip-208-72-192-227.bittorrent.com
208.72.192.232	A+PTR	ip-208-72-192-232.bittorrent.com
208.72.192.236	A	ip-208-72-192-236.bittorrent.com
208.72.192.242	A+PTR	ip-208-72-192-242.bittorrent.com
208.72.192.248	PTR	ip-208-72-192-248.bittorrent.com
208.72.192.249	PTR	ip-208-72-192-249.bittorrent.com
208.72.192.250	PTR	ip-208-72-192-250.bittorrent.com
208.72.193.9	PTR	smtp-01.bittorrent.com
208.72.193.66	PTR	www.bittorrent.com
208.72.193.69	PTR	tracker.bittorrent.com
208.72.193.77	PTR	cuuids.bittorrent.com
208.72.193.86	A	images.bittorrent.com
208.72.193.101	PTR	update.dna.bittorrent.com
208.72.195.5	A	bench.utorrent.com
208.72.199.10	A	intranet.bittorrent.com
208.72.199.10	A	directory.bittorrent.com
208.72.199.10	A	svn.bittorrent.com