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  1. Area code 605 is the telephone area code in the North American Numbering Plan for the entire U.S. state of South Dakota. The numbering plan area was designated in 1947, when the American Telephone and Telegraph Company (AT&T) devised a comprehensive telephone numbering plan for the United States and Canada.

  2. 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 number, this allowed for hundreds of millons of new phone numbers to be issued.

  3. Coordinates: 18.2223°N 66.4303°W. Telephone numbers in Puerto Rico are assigned under the North American Numbering Plan (NANP). Their area codes are 787 or 939 . Prior to March 1, 1996, Puerto Rico was one of many Caribbean islands served by area code 809. On that date Puerto Rico was assigned the new area code 787 (with the mnemonic PUR or PTR).

  4. Area code 302 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Delaware. It is Delaware's only area code, and was assigned in 1947 as one of the original North American area codes . Despite the rapid growth in telecommunication services in the northern part of the state, area code 302 is not projected ...

  5. 608 area code – search to find any full phone number. Report includes demographic information for 608 in Madison, WI. No credit card required!

  6. Area code 262. Coordinates: 43°00′N 88°15′W. Map of Wisconsin's numbering plan areas and area codes. Area code 262 is a telephone area code in the North American Numbering Plan for the southeastern part of the U.S. state of Wisconsin. The numbering plan area comprises suburbs that are a part of the Milwaukee and Chicago metropolitan areas.

  7. Coordinates: 39.971°N 74.570°W. Numbering plan areas and area codes of New Jersey. Area codes 609 and 640 are telephone overlay area codes in the North American Numbering Plan (NANP) for the central and southern parts of the U.S. state of New Jersey. The numbering plan area includes the cities of Trenton, Princeton, Ewing, Hamilton, and ...