[kevincox]

It is better in the US as generally all plays are country-wide but as a Canadian my number has changed many times.

- First number. - Moved to a different city for Uni. Switched number so that people didn't have to pay long-distance to call. - Moved back. - Move to Europe for a job. - Moved back.

I would never consider an identifier that is (loosely) tied to your location stable.