cmoore@brl.mil (VLD/VMB) (01/25/91)
The area codes 310 and 510 (both in California) and 410 (Maryland) will be the first of the N10 form. When they come on line, they also will be the first that can be formed by transposing two digits in a previously-existing area code, so beware of people trying to "correct" them by changing 10 to 01.
cmoore@brl.mil (VLD/VMB) (01/28/91)
Oops, maybe I should have added "adjacent" to my message warning about 301/310 etc., given the message I have received about 415/514. (I also had a case where I answered a Newark, Delaware pay phone on 302-366 exchange, was asked by a British-sounding operator if I would accept a collect call, and I said I didn't think I could since I was on a pay phone; I started reciting the number, including the area code, where I was, and the operator said "203, 302 -- oh, wrong number.")