It sounds like they'll tell law enforcement if a phone number belongs to, for example, Microsoft or Earthlink ("wholesale customer"), but it's up to that compan

It sounds like they'll tell law enforcement if a phone number belongs to, for example, Microsoft or Earthlink ("wholesale customer"), but it's up to that company to tell law enforcement who is actually using the phone number. This seems about as leaky as whois servers (which say which ISP an address block is assigned to).