Initial use of area codes in the United States and Canada began in the late 1940s with large cities. By 1966, the system was nationwide. Area codes were assigned based on the length of time a rotary dial phone took to dial the area code. Densely populated areas like New York City, Chicago, Los Angeles, and Detroit had huge incoming call volume and were assigned numbers (212, 312, 213, 313) that could be quickly dialed from a rotary dial phone. This numbering strategy became unnecessary when touch-tone phones arrived, as the tone allowed instant entry of digits.
The original set of North American area codes were unique. Simplicity was mandatory. The second digit of all area codes was 0 or 1, while the second digit of the exchange triplet was never 0 or 1, thus facilitating readily the recognition whether the dialing of a full 10-digit number was in progress or whether the user was dialing only a local number. In this coding scheme, a leading 1 indicating long distance, or out of the area code call, was not necessary.
By the 1990s, the Area Code logic was no longer necessary. The need for more telephone numbers was increasing rapidly, and the Area Code scheme was abandoned. Currently, because of Area Code overlays, nearly all metropolitan and many rural telephone calls require the full 10-digit entry to complete a telephone call. [Wikipedia - Telephone Numbering Plan]
Match the Area Codes below to the state they are used in to find the final coordinates.
N 40° (FL) (FL) . (CO) (AZ) (MN)
W 111° (KY) (CO) . (TX) (PA) (WI)
0 = 480
1 = 215
2 = 201
3 = 352
4 = 409
5 = 502
6 = 608
7 = 720
8 = 828
9 = 952