Forty NPAs were mapped to entire states or provinces. Each NPA was identified by a three-digit area code used as a prefix to each local telephone number. The United States received seventy-seven …

Oct 7, 2022 · This map shows the original area code boundaries, established in 1947. Customer direct-dialed long distance did not yet exist, but area codes facilitated operator-dialed calls.

On January 1, 1947, the first North American area codes were issued in regions where standard 7 digit dialing codes were scheduled to be exhaused the soonest. By adding a 3 digit prefix to a 7 digit local …

Map 18 is a summary map which highlights the Original area code assignments in changes since 1947. states not requiring code *ellef are shown in white. New codes are shown shaded.

The first and third digits were allotted according to population density in the city or region the area code was going to, with the most populated areas getting the lowest numbers. The New York City area, for …

The original North American area codes were established by the American Telephone and Telegraph Company (AT&T) in 1947, after the demonstration of regional Operator Toll Dialing during the World …

213, 415 and 916 were the first designated area codes for California, way back in 1947. All succeeding area codes were split off from these 3. Im

Dec 7, 2025 · Table of the original 86 telephone area codes in North America, 1947.

The pattern of this official assignment of area codes is illustrated in the following tabulation, separated into U.S. states or Canadian provinces with a single area code, and those with multiple NPA …

Dec 7, 2025 · The following chart shows the original 86 area codes, plus the regions that were added later, and the area codes now used in those regions. Many of the new area codes were created by …