cmoore@BRL.ARPA (Carl Moore, VLD/VMB) (10/17/85)
I have continued reading area codes, prefixes, and place names from a 1982 edition of V&H tape, and have now reached the end of area 519. Next are Mexican points with 6-digit NPA-NXX combination starting with "52", the country code appearing in your international-dialing page(s). Such use of 52x is not an area code in the usual sense of the word. How many digits do these Mexican numbers have after the "NPA-NXX" combination on the tape? (Area code 706 is used for some points in northwestern Mexico, such as Tijuana.)