A geographic service area defined in the AT&T
Modified Final Judgement. The RBOCs (baby Bells) and GTE are restricted
to operations within, but not between, LATAs. Long distance service
within a LATA is provided by the Local Exchange Carrier. Service between
LATAs is provided by an Interexchange Carrier. LATAs are represented
by a 3-character code, and there are 164 of them across the country.