Column Name        Type           Column Definition 
RecordID           bigint         Unique identifier of the record 
NPA                varchar(3)     Number Plan Area (NPA) code is the first three digits of a ten-digit North American Numbering Plan number (commonly called the area code)
NXX                varchar(3)     Central Office code is the first three digits following the area code in a ten-digit North American Numbering Plan number (commonly called the telephone exchange or prefix)
LATA               varchar(3)     Local Access and Transport Area (LATA) code of the rate center 
RateCenterName     varchar(10)    Name of the rate center 
WireCenterName     varchar(25)    Name of the wire center 
WireCenterCity     varchar(28)    Name of the city that the wire center is located in 
State              varchar(2)     Two-character state, province, or territory abbreviation 
ZipCode1           varchar(5)     Five-digit postal code used by the United States Postal Service 
ZipCode2           varchar(5)     Second possible postal code 
ZipCode3           varchar(5)     Third possible postal code 
FIPSCode           varchar(5)     Five-digit United States FIPS county code: State (2) + County Code (3) 
Latitude           varchar(7)     Latitude of the general NPA NXX service area 
Longitude          varchar(8)     Longitude of the general NPA NXX service area 