[comp.dcom.telecom] Area Code Mapping

Carl Moore (VLD/VMB) <cmoore@brl.mil> (01/13/90)

There is an Iowa prefix (Cedar Lake?) right next door to Omaha,
Nebraska, which can be reached with 2 area codes: 712 (Iowa) or 402
(Nebraska).

Area code 202 goes outside the beltway, too.  However, when you get to
outer fringes like Herndon (Va.) or Laurel (Md.), you are local to DC
but outside of area code 202.  Previous articles in Telecom have
explained that 202 will be restricted to DC, and that local calls in
DC area will become 10 digits when crossing area code boundary, and
that the cases of 11-digit local calls (extended-area from Va. suburbs
to Prince William, and from Bowie-Glenn Dale "foreign" exchanges to
569 in Severn, Md.) may later be reduced to 7 digits.