List of area code overlays

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An area code overlay is a North American area code that is assigned to the same numbering plan area (NPA) as at least one other area code. Overlay codes are determined and regulated as part of the North American Numbering Plan to increase the number of available telephone numbers in a province, state or region.[1]

The North American Numbering Plan Administration maintains the definitive list of overlay plans of area codes in the United States.[2] The majority of overlay plans in North America have occurred since 1995.[3] The process has been driven by fragmentation of numbering resources by a growing number of competitive local exchange carriers.

Active area code overlays[edit]

Overlay code Base NPA Location
220 740 Central and Southeastern Ohio
224 847 northern suburbs of Chicago, Illinois
226 519 Southwestern Ontario.
234 330 Akron-Canton and Warren-Youngstown areas in Ohio.
236 604 and 250 British Columbia
240 301 Washington, D.C. suburbs and panhandle of Maryland.
249 705 Northeastern Ontario and Central Ontario.
267 215 greater Philadelphia, Pennsylvania area and its surrounding suburbs.
272 570 Northeastern Pennsylvania, including the cities of Scranton, Wilkes-Barre and Williamsport.
281, 346, and 832 713 Greater Houston, Texas.
289 and 365 905 Golden Horseshoe region of Ontario, including suburban Toronto, Hamilton, Oshawa, and the Niagara Peninsula in Ontario.
321 407 Central Florida in addition to being the sole area code in the Space Coast region around the Kennedy Space Center. It is the only partial overlay area code in North America
331 630 western suburbs of Chicago.
332 and 646 212 New York City borough of Manhattan, except for the Marble Hill neighborhood, which is physically connected to The Bronx.
339 781 suburban Boston, Massachusetts and most of the South Shore region.
343 613 Ottawa and Eastern Ontario.
347 and 929 718 New York City boroughs of The Bronx, Brooklyn, Queens, and Staten Island, as well as Marble Hill, a Manhattan neighborhood physically attached to The Bronx.[4]
351 978 north central and most of north eastern Massachusetts.
364 270 western half of Kentucky—including the Purchase area, the Western Coal Fields, and most of the Pennyrile.[5]
380 614 Columbus, Ohio, and suburbs. (Effective February, 2016.)
385 801 along the Wasatch Front of Utah, including Salt Lake City, ProvoOrem, and Ogden.
424 310 southwestern part of Los Angeles County, California.
430 903 northeast Texas.
431 204 Manitoba.
437 and 647 416 Toronto, Ontario.
438 514 Island of Montreal, Quebec.
440 216 parts of greater Cleveland, Ohio.
442 760 the southeastern part of California.
443 and 667 410 Baltimore, its suburbs, and the Eastern Shore of Maryland.
458 541 most of Oregon, excluding the northwestern portion of the state.
469 and 972 214 eastern portion of the Dallas–Fort Worth Metroplex in and around Dallas, Texas.
470 and 678 404 and 770 metro Atlanta, Georgia.
475 203 southwestern Connecticut.
484 610 eastern and parts of southeastern Pennsylvania.
531 402 eastern Nebraska.
539 918 northeastern Oklahoma.
551 201 northeastern New Jersey.
567 419 northwest Ohio, including Toledo and Lima.
571 703 Northern Virginia.
581 418 eastern Quebec.
587 403 and 780 Alberta.
629 615 Nashville.
628 415 San Francisco, Marin County and small portions of San Mateo County since February 21, 2015.
639 306 Saskatchewan.
657 714 northern Orange County, California.
669 408 South Bay Area in California, encompassing much of Santa Clara County and Silicon Valley.[6]
681 304 West Virginia.
682 817 western part of the Dallas-Fort Worth Metroplex, in and around Fort Worth, Texas.
720 303 Denver, Colorado area.
725 702 Clark County, Nevada, including Las Vegas.
743 336 the Greensboro, Winston-Salem, High Point, North Carolina metropolitan area.
747 818 Los Angeles, California area including Glendale/Burbank and Agoura/Calabasas areas.
754 954 Broward County, Florida, including Fort Lauderdale.
769 601 central Mississippi.
774 508 south central and most of south eastern Massachusetts, including Cape Cod and the Islands.
778 604 and 250 British Columbia
779 815 Northern and North Central Illinois, including the Rockford, Freeport, and Kankakee areas.
782 902 Nova Scotia and Prince Edward Island on 30 November 2014.
786 305 Miami-Dade County, Florida and the Florida Keys.
825 403 and 780 Alberta.
829 and 849 809 Dominican Republic.
848 732 central New Jersey.
857 617 Boston, Cambridge and Quincy, Massachusetts.
862 973 northern New Jersey.
872 both 312 and 773 Chicago, Illinois.
873 819 Gatineau and western Quebec.
878 both 412 and 724 metro Pittsburgh, Pennsylvania.
917 212, 332, 347, 646, 718, and 929 Entirety of New York City: (The Bronx, Brooklyn, Manhattan, Queens, and Staten Island), primarily for cellular phones, pagers, and voicemail machines.[4]
930 812 southern Indiana.
934 631 Suffolk County, New York, on Long Island.
938 256 northern Alabama.
939 787 Puerto Rico.
947 248 Oakland County, Michigan.
971 503 north western Oregon, including the Portland, Salem, and Astoria metropolitan areas.
980 704 the Charlotte, North Carolina metropolitan area.
984 919 the Raleigh-Durham, North Carolina metropolitan area.

Pending and planned overlays[edit]

Various new area codes are planned or proposed.[7] A few overlay implementations (557 MO, 564 WA, 689 FL, 975 MO) have been suspended, often because wasteful allocation of telephone numbers has been mitigated by number pooling or other conservation efforts.

  • 332 is planned to overlay 212 and 646 in 2017.
  • 387 is reserved as a future overlay for 416.
  • 447 is planned for overlay of 217, with no precise time frame for integration.
  • 464 is also reserved for 708, to be integrated once the original area code is exhausted.
  • 470 will supplement the 678 overlay already present for 404 and 770 in Metro Atlanta. The new area code was announced in 2001, but will not be used until all assignable 678 NXX codes are exhausted.[8]
  • 564 planned for Washington area code 360 in 2017.[9]
  • 672 is proposed as a future overlay in British Columbia after 236 is exhausted.
  • 679, planned to overlay 313 in Michigan.[10]
  • 680 is planned to overlay 315 in North Central NY. Anticipated start is 1Q 2017. [11]
  • 742 is reserved as a future overlay for 905.
  • 833 is proposed to overlay non-geographic toll-free codes 800 and 844 through 888 in mid-2017,[12] largely due to failure of the Federal Communications Commission to enforce its regulations regarding hoarding, brokering or warehousing toll-free numbers.[13]
  • 835 is proposed to overlay 610 and 484. This plan has been suspended by the Pennsylvania Public Utilities Commission.[14]
  • 934 is proposed to overlay 631 in September 2016.
  • 959 is to overlay Connecticut's 860. As with 475/203, it was proposed in 1999,[1] but withdrawn.[4]

References[edit]