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  2. List of Illinois area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Illinois_area_codes

    Area code 847 exhausted its numbers quickly, so that an overlay area code, 224, was implemented in 1996 for relief. However, mandatory ten-digit dialing was not in effect until 2002. 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 ...

  3. List of North American Numbering Plan area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_North_American...

    area code 387 is reserved as a fifth code for the region; 438: Quebec (Montreal metropolitan area) November 4, 2006: overlaid on 514; 2022: overlaid by 263; 439: not in use; available for geographic assignment 440: Ohio (surrounding Cleveland on three sides, including: Elyria, Lorain, Oberlin, Ashtabula, and most of north-central Ohio) August ...

  4. List of Florida area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Florida_area_codes

    In 1988, area code 407 was introduced for the Orlando area. [1] In 1995, area code 954 was introduced for Broward County. In 1996, area code 239 was introduced for southwest Florida and area code 352 for the areas around Gainesville and Ocala. Many new area codes were introduced in the first two decades of the 21st century, as a result of city ...

  5. Area codes 630 and 331 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_630_and_331

    Area code 630 is the parent area code of the numbering plan area, created in a three-way area code split of area code 708 on August 3, 1996, with the southern suburbs keeping 708 and the northern suburbs receiving 847. Within a decade, 630 was close to exhaustion due to the growth of the Chicago suburbs and the proliferation of cell phones and ...

  6. Area code 312 - Wikipedia

    en.wikipedia.org/wiki/Area_code_312

    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 ...

  7. List of area code overlays - Wikipedia

    en.wikipedia.org/wiki/List_of_area_code_overlays

    Central Florida: In addition to being the sole area code in the Space Coast region around the Kennedy Space Center, this is the only partial overlay area code in North America 323: 213: Central Los Angeles, incl. Downtown L.A. and Hollywood: 326: 937: Southwest Ohio: 331: 630: Western suburbs of Chicago: 332, 646 , 917: 212

  8. Area codes 847 and 224 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_847_and_224

    The numbering plan area (NPA) comprises the northeastern part of Illinois and many northern suburbs of Chicago. This includes most of Lake County, the northern part of Cook County, the northern part of Kane County, and a small part of McHenry County. Area code 847 was created on January 20, 1996, in a three-way split of area code 708.

  9. Area codes 708 and 464 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_708_and_464

    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. The northern suburbs received area code 847, while the western suburbs were assigned area code 630.