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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 northern part of Illinois, 708, eventually received such with area code 464 taking effect on January 21 ...
The numbering plan area comprises most of western and southern Cook County, and eastern and southern Will County. Area code 708 was created on November 11, 1989, in a split of area code 312. It once served almost all of Chicago's suburbs in Illinois. In 1996, its numbering plan area was reduced in a three-way area code split.
Area code 847 was involved in the first trial of telephone number pooling in the United States in June 1998, to avert central office code exhaustion in the numbering plan area. [1] Nevertheless, within only five years, 847 was already close to exhaustion from the rapid growth in telecommunication services in the Chicago suburbs and the ...
The numbering plan area is completely surrounded by area code 773, which serves the rest of Chicago. Both area codes form an overlay complex with area code 872. 312 is an enclave area code, and is roughly bounded by North Avenue on the north, Western Avenue on the west, and 35th Street on the south, with Lake Michigan to the east. In terms of ...
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]
The new area code was one of the first area codes not serving an entire state, but having the digit 0 in the middle position of the code. It was the only new area code created in Illinois between 1947 and the 1989 creation of area code 708. [2] In preparation of an overlay plan with the new area code 779, all calls from the 815 area needed to ...
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 ...
In 1989, area code 708 was created for the suburbs, leaving the city in area code 312. By the mid-1990s, Chicago's continued growth and the proliferation of cell phones and pagers made it apparent that the city needed a new area code. It was decided to split off all of the city outside the downtown area as 773. The new area code went into ...