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This is a list of telephone area codes of Pennsylvania. In 1947, the American Telephone and Telegraph Company divided Pennsylvania into four numbering plan areas (NPAs) and assigned distinct area codes for each. Since 1995, several relief actions in form of area code splits and overlays have expanded the list of area
Norio Taniguchi (谷口 紀男, Taniguchi Norio, May 27, 1912 – November 15, 1999) was a professor of Tokyo University of Science.He coined the term nano-technology in 1974 [1] to describe semiconductor processes such as thin film deposition and ion beam milling exhibiting characteristic control on the order of a nanometer: "Nano-technology"
Area codes 215, 267, and 445; Area code 412; Area code 445; Area codes 570 and 272; Area codes 610, 484, and 835; Area codes 717 and 223; Area code 724; Area codes 814 and 582; Area code 835; Area code 878
2023: returned to the pool of area codes available for future area code relief; 457: Louisiana (Shreveport–Bossier City, Monroe, Alexandria, Fisher, Tallulah, and most of northern Louisiana) September 25, 2025 [3] to be overlaid on 318; previously a fictitious area code assigned to identify Naked DSL/Dry Loop and dedicated data lines in ...
The need for new phone numbers in area codes 215/267 was delayed until 2018. Area code 445 was activated as an additional overlay code on February 3, 2018. [3] This had the effect of assigning 23 million telephone numbers to a service territory of four million people, and 215/267/445 is not projected by the NANP to need a fourth area code until ...
From 1979 to 1999 the canal itself was under joint U.S.-Panamanian control. Since 1980, it took the country code of Panama (PA). Retired. Panama Canal Zone area was returned to Panama. The area is now under WAC 162. 1 162 16201 Panama Middle America Panama Independent State in the World Panama PA 1950-01-01 1 174 17401 San Andres Island Middle ...
Map of previous proposed split of 814 with 582, showing county lines. When numbering pool exhaustion became a threat in the 2000s, the Pennsylvania Public Utility Commission (PUC) approved a numbering plan split in December 2009, that would have assigned area code 582 to most of the northwestern portion of the territory, including Erie, by 2012. [2]
Area code 231 was created in June 1999 by an area code split of area code 616, which had served the entire western half of the Lower Peninsula, extending west from the north-south line aligned with the Mackinac Bridge. 231 was carved out of the northern part.