In my situation the prepaid calls are not stored. The pre paid bundle sits on the switch and depletes as calls are made. The pre paid MSISDN is in the billing system as is the SIM but the calls made to it are not stored because of storage costs and the fact that pre paid users dont recieve an invoice so there is no need. If we ever needed to check the prepaid info we would need to look on the gateway itself not the retail billing system. The CDR files we process are purely for post paid subscribers only so only those files are rated and stored. As for just handing out numbers to anybody that calls in and ask I hope those companies you worked for are aware they are opening themselves up to all sorts of legal issues. Some users have unlisted number for a reason you know. We do not give out user information to anyone unless they have a warrent.