BayTSP

BayTSP is a San Francisco based internet company run by Mark T. Ishikawa whose stated speciality is tracking infriging content on the internet and getting the ISPs of any part of the internet found infringing to shut that content down. Another similar organization is NetPD of Cambridge, England run by Bruce Ward.

Though they keep their customer list secret, it is rumoured that they do business with the RIAA, MPAA and they are confirmed to do business with the Business Software Alliance.