And don't forget that you still have to change your phone number when you move a great enough distance. In IP we somehow feel it's important that there are no geographical constraint on address use at all. That's a shame, because even if we aggregate by contintent that would save up to four times in the number of entries in the routing table of any router.
Not necessarily true. I live in California. However, 703-842-5527 is a valid phone number for me. It even worked for me while I was in Puerto Vallarta, Mexico. I can take that number pretty much any where in the world, whether temporarily, or, even if I move there. Some exceptions would be the few countries that are attempting to block or make VOIP illegal, but, otherwise, I can pretty much take a VOIP phone number anywhere I like.
Additionally, through FXP, you can take other numbers different places as well.
However, I agree these are exceptions, not the general case. Nonetheless, the problem can be solved. I bet companies would be more willing to renumber when switching physical locations than they are to renumber when switching carriers at the same physical location.
Owen
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