[japper88]

Yea in New York City they're like that too (although I always through it was because New York City had 5 different area codes: 212, 718, 917, 646, 347)

Also, I think cell phones require the area codes because they're not tied to one specific region, meaning they can ping off different cell towers, which determine your location not your phone's number. Where as caller ID uses the area code from your number to give locations.