"The syntax rules for area codes do not permit the digits 0 and 1 in the leading position."
My guess would be it's to avoid ambiguity with the fact that 1 is also the country code. If I recall correctly, historically, dialing the 1 was necessary for any long distance call (even if not international).
>If I recall correctly, historically, dialing the 1 was necessary for any long distance call (even if not international).
You recall correctly. I haven't had a landline for a number of years now but I think it was still required latterly when I still had one. Don't think it was ever needed on cell (or maybe even valid) when I first got one at some point in the 1990s.
It used to be the case that the middle digit of an area code had to be a 0 or a 1. All the O.G. "cool" area codes like 212 are in this format, and the less desirable new area codes like 646 are not (yes, this is an accidental Seinfeld reference).
