[Motel75]

Yes, it's a little different in North America, where there are no specific mobile prefixes, so the area codes with the most cachet are the same as they've ever been, particularly 212 - though the advent of mobile telephony has meant that anyone (like, say, me) can have a Manhattan phone number without having to live there. The fact that mobile phones cost the same to call as other numbers in North America also makes a "local" number desirable, and for Canada, a Toronto number is a local call to a large share of the country's population, making 416 - as PhotoJim said - the one to get.

However, elsewhere, the original GSM mobile prefixes were often a) the most recognizable because they were the first; b) relatively quickly exhausted due to failure to anticipate demand; and c) sometimes "prestigious" for these reasons. (And these are the ones that are sold for a premium on eBay.)

However, there were some other situations, such as the UK, where all the prefixes were changed after GSM was well established. Can anyone explain that one?