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In March 2007, an overlay plan was created for NPA 630 adding area code 331, and 779 was added to 815. With the depletion of new numbers in area codes 312 and 773, an overlay of both of them, area code 872, was created in November 2009, beginning ten-digit dialing within the city limits of Chicago. The remaining area without an overlay in the ...
Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
As a result, the 717 area code remained unchanged for 41 years. For nearly all this time, it was the largest numbering plan area on the Eastern Seaboard . It was pushed slightly eastward in 1994 as part of the split of Philadelphia 's 215 , when a few towns in eastern Lancaster County and western Chester County that were slated to transfer to ...
The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d with OpenStreetMap data, using open source software. [1] This is a list of time zones from release 2025a of the tz database. [2]
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An area code overlay is a numbering plan area (NPA) in the North American Numbering Plan (NANP) that has multiple area codes assigned. Overlay complexes are used to add central office prefixes in an NPA to increase the number of available telephone numbers. [1]
As a result, the city of Chicago was divided into two area codes, 312 and 773. Rather than divide the city by a north–south area code, the central business district retained the 312 area code, while the remainder of the city took the new 773 code. In 2002, the 847 area code was supplemented with the overlay area code 224.
Now, using a text editor, for each file, you only have to edit one lineto change the CSS color for that individual Pennsylvania area code region, then save each specific map under the following names: file:Area code 215.svg, file:Area code 412.svg, file:Area code 484.svg, file:Area code 570.svg, file:Area code 717.svg, file:Area code 724.svg ...
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