I was thinking the same thing; the city I'm in isn't even that large (approx 450k pop.) but I could probably go through my list of contacts that live in-town and rattle off at least two-dozen area codes that aren't native to the area (on top of the dozen or so that are), with at least half of those being out-of-province. The slow death of long-distance billing, which also finds itself competing with the likes of FaceTime et. al., coupled with the highly-mobile nature of cell phones, have just made it a hassle to go through the process of changing your phone number for anything other than moving to another country (or a wicked discount).