 CHAR: When Jay Twistle is giving Chris his phone number and Chris  cant find a pen to write down the number, Jay states the phone  number with ten digits (area code first). But in 1981, all  metropolitan areas (except for L.A. and those that crossed state  lines) only had one area code and no local calls within the same  area code required dialing the area code. Since both Jay and Chris  lived in the San Francisco area, it wouldnt be reasonable for Jay  to give him his ten digit number.