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Area code 406 is the telephone area code in the North American Numbering Plan for the entire U.S. state of Montana. It has been Montana's only area code since the American Telephone and Telegraph Company created a nationwide telephone numbering plan in 1947.
406: Montana (all) 1947: 407: Florida ... area code 387 is reserved as a fifth code for the region; 648: not in use; available for geographic assignment 649: The ...
Area code 603 is the sole area code for the U.S. state of New Hampshire in the North American ... 406 Bow: Merrimack: December 21, 2018 407 Belmont: Belknap: May 6 ...
Initially, area codes with the middle digit 0 were assigned to numbering plan areas that comprised an entire state or province, while jurisdictions with multiple numbering plan areas received area codes having 1 as the second digit. As network growth could not be predicted accurately over more than a few years, this pattern was abandoned by ...
Quick Take: List of Scam Area Codes. More than 300 area codes exist in the United States alone which is a target-rich environment for phone scammers.
Area code 408 was split from area code 415 in 1959. The numbering plan area was reduced in geographic extent in 1998 for the creation of area code 831. In 2012, area code 669 was assigned as a second area code for same numbering plan area by overlay.
To find out the 25 poorest and richest area codes, GOBankingRates used the 2015 Census Community Survey, the most recent data available, to rank cities across the nation in order of mean household ...
For convenience, all U.S. area codes should be included in this category. This includes all area codes that can also be found in the subcategories. ... Area code 406 ...