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Area code 504 as of after 2007. Area code 504 as of 1947–1957. Area code 504 is a telephone area code that covers greater New Orleans, Louisiana. Besides New Orleans itself (Orleans Parish), it includes all of St. Bernard and Plaquemines parishes and most of Jefferson Parish.
- Area code 504 - Simple English Wikipedia, the free encyclopedia
Area code 504 is an area code for Louisiana. It was one of...
- Area code 504 - Simple English Wikipedia, the free encyclopedia
List of North American Numbering Plan area codes - Wikipedia. Contents. hide. (Top) Area codes in numerical order. 200–299. 300–399. 400–499. 500–599. 600–699. 700–799. 800–899. 900–999. Area codes by country, state, province, and regions. United States. Canada. Caribbean and Atlantic islands. U.S. Pacific territories. Non-geographic area codes.
CodeTerritory Or UseDate200not in use; available for non-geographic ...easily recognizable code (ERC)New Jersey ( Bergen County and Hudson ...19471947Southwestern Connecticut ( Bridgeport, ...1947- History
- Numbering Plan Requirements
- Central Office Prefixes
- Numbering Plan Areas
- Assignment Plan
- Implementation and Expansion
- See Also
Early during the 20th century, the American and Canadian telephone industry had established criteria and circuits for sending telephone calls across the vast number of local telephone networks on the continent to permit users to call others in many remote places in both countries. By 1930, this resulted in the establishment of the General Toll Swit...
Building a nationwide network in which any telephone could be dialed directly required a systematic numbering system that was easy to understand and communicate. Local telephone numbers varied greatly across the country, from two or three digits in small communities, to seven in the large cities. By the time the Bell Laboratory engineers began effo...
Most automatic dial switching systems were designed since the early 1920s to provide service for as many as ten-thousand subscriber lines. Each of these switching systems constituted a local telephone exchange, formally known as a central office. Therefore, each telephone connected to a central office had a unique four-digit line or station number....
By 1945, initial concepts for a nationwide numbering plan anticipated a division of the continent into between fifty and seventy-five numbering plan areas. For this size of the network, a unique two-digit code for each numbering plan area (NPA) would have been sufficient. However, AT&T wanted to preserve existing dialing practices by only dialing t...
The number of central offices that could be effectively installed with a numbering plan with two letters and one digit for the central office code was expected to be approximately five-hundred, because acceptable names for central offices had to be selected carefully to avoid miscommunication. States or provinces that required this many offices had...
For several years, area codes could be used only for Operator Toll Dialing by long-distance operators on routes between toll offices equipped with trunk code translation equipment. This absent, operators still had to rely on route operators and office-specific trunk codes, or employ the previous method of ringdown forwarding between intermediate op...
- 217, 312, 618, 815
- 216, 419, 513, 614
- 212, 315, 518, 716, 914
- 215, 412, 717, 814
504 – Louisiana Area Codes. Number structure. List of area codes. Sort by: City. Area Code. 504-218. New Orleans. 504-241. New Orleans. 504-242. New Orleans. 504-244. New Orleans. 504-245. New Orleans. 504-246. New Orleans. 504-254. New Orleans. 504-271. Chalmette. 504-277. Chalmette. 504-278. Chalmette. 504-279. Chalmette. 504-282. New Orleans.
2 days ago · 504 is an area code located in the state of Louisiana, US. The largest city it serves is New Orleans. Location, time zone and map of the 504 area code. Local time. 8:12:04 PM, Friday 31, May 2024 CDT. Time difference to GMT/UTC. Daylight Saving Time 2024 (Summer Time) DST starts on Sunday 10 March 2024, 02:00.
AreaCode.io. Area Code 504 - Louisiana. Cities in Area Code 504. Bridge City, Chalmette, Gretna, Harahan, Harvey, Jefferson, Kenner, Marrero, Meraux, Metairie, New Orleans, River Ridge, Terrytown, Waggaman, Westwego. Area Code 504 Prefixes.
