Here in Canada, the CRTC has legislated that your phone number is yours. When you change phone companies, you have a right to keep your number. The process is call "Porting". You need to submit a LOA or "Letter of Authority" in which you declare that the phone number is yours and you authorize it to be transfered to your new phone company
How Porting a Phone Number Works
Phone number porting is guaranteed for all numbers declared "portable" for technical reasons. Moving phone numbers is largely a administrative effort.
- The new carrier notifies the current carrier of the requested port.
- The current carrier is asked to validate the subscriber's information.
- The current carrier confirms the subscriber's information and notifies the new carrier.
- The current carrier notifies the Public-Telephone-Network-Managers of the requested port.
- The Public-Telephone-Network-Managers creates a pending port and sends a notification to the current carrier.
- Optionally, the current carrier notifies the Public-Telephone-Network-Managers that it agrees and accepts the port request.
- The new carrier notifies the Public-Telephone-Network-Managers to activate the port.
- The pending port is activated in the Public-Telephone-Network-Managers and broadcast to the telecommunications industry network within milli-seconds.
- Each Public-Telephone-Network record, referred to as a Subscription Version, contains various pieces of information about the telephone number.
- The new carrier becomes the current carrier and obtains delegated administrative authority over the phone number