List of area code overlays

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
Overlay code Base NPA Location Notes
220 740 Central and southeastern Ohio
223 717 South Central Pennsylvania
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 and central Ontario
267 and 445 215 Greater Philadelphia, Pennsylvania area and its surrounding suburbs
272 570 Northeastern Pennsylvania, including the cities of Scranton, Wilkes-Barre, and Williamsport
279 916 Sacramento, California and surrounding suburbs
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, this is the only partial overlay area code in North America
326 937 Southwest Ohio
331 630 Western suburbs of Chicago
332, 646 and 917 212 New York City borough of Manhattan, except for the Marble Hill neighborhood, which is physically connected to The Bronx and uses 718
339 781 Suburban Boston, Massachusetts and most of the South Shore region
341 510 San Francisco East Bay
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 directly connected to The Bronx[4]
351 978 North-central and most of northeastern Massachusetts
364 270 Western half of Kentucky, including the Purchase area, the Western Coal Fields, and most of the Pennyrile[5]
367 and 581 418 Eastern Quebec
380 614 Columbus, Ohio, and suburbs
385 801 Along the Wasatch Front of Utah, including Salt Lake City, Provo–Orem, and Ogden
424 310 Southwestern Los Angeles County, California
430 903 Northeastern 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 Southeastern California
443 and 667 410 Baltimore, its suburbs, and the Eastern Shore of Maryland
458 541 Most of Oregon, excluding its northwestern part
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
564 360 Western Washington
567 419 Northwestern Ohio, including Toledo and Lima
571 703 Northern Virginia
587 403 and 780 Alberta
628 415 San Francisco, Marin County and small portions of San Mateo County
629 615 Nashville
639 306 Saskatchewan
640 609 Central and southeast New Jersey
657 714 Northern Orange County, California
658 876 Jamaica
659 205 Western and central Alabama
669 408 Southern Bay Area in California, encompassing much of Santa Clara County and Silicon Valley[6]
672 604 and 250 British Columbia
680 315 An area of Upstate New York including parts of Central New York and the North Country, with Syracuse as the main city in the region
681 304 West Virginia
682 817 Western part of the Dallas–Fort Worth Metroplex, in and around Fort Worth, Texas
689 407 Orlando, Florida
720 303 Denver, Colorado area
725 702 Clark County, Nevada, including Las Vegas
726 210 San Antonio, Texas
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 southeastern 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
820 805 Santa Barbara County, California and surrounding areas
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
872 312 and 773 Chicago, Illinois
873 819 Gatineau and western Quebec
878 412 and 724 Metro Pittsburgh, Pennsylvania
917 212, 332, 347, 646, 718, and 929 The 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
959 860 Northern and western Connecticut
971 503 Northwestern 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
986 208 Idaho

Pending and planned overlays

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

  • 368 is planned for overlay of 587 and 825 starting in May 15, 2021.[8]
  • 387 is reserved as a future overlay for 416.
  • 428 is planned for overlay of 506 starting on November 21, 2020.[9]
  • 447 is planned for overlay of 217, with no precise time frame for integration.
  • 448 is planned for overlay of 850 starting in February 2021.
  • 464 is also reserved for 708, to be integrated once the original area code is exhausted.
  • 474 is planned for overlay of 306 and 639 starting in October 2021.[10]
  • 572 is planned for overlay of 405.[11]
  • 679, planned to overlay 313 in Michigan.[12]
  • 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,[13] largely due to failure of the Federal Communications Commission to enforce its regulations regarding hoarding, brokering or warehousing toll-free numbers.[14]
  • 835 is proposed to overlay 610 and 484. This plan has been suspended by the Pennsylvania Public Utilities Commission.[15]
  • 839 is planned for overlay of 803 starting in May 2020.[16]
  • 840 is planned for overlay of 909.[17]
  • 948 is planned for an overlay of 757, either in late 2021 or early 2022

References
  1. Haar, Dan and Vanessa Hua. "Regulators Have Area Code Plan". The Courant. August 18, 1999. Accessed October 28, 2005.
  2. NANPA : Number Resources - NPA (Area) Codes
  3. http://www.nanpa.com/enas/npaSince1995Report.do
  4. Madison, Linc. "LincMad's Area Code Locator Table". LincMad. September 29, 2005. Accessed October 28, 2005.
  5. "PSC Selects Overlay for New Area Code in Western Kentucky: Current numbers in area code 270 remain unchanged; decision means 10-digit dialing for local calls beginning in 2014". Retrieved December 17, 2012.
  6. "New 669 Area Code Joins South Bay 408 Region Saturday". KPIX-TV.
  7. http://www.nanpa.com/enas/plannedNpasNotInServiceReport.do
  8. "Relief for area codes 403, 587, 780, and 825 in Alberta". crtc.gc.ca. 3 May 2019. Retrieved 13 March 2020.
  9. "Hello 428: New Brunswick's new area code has been assigned". CBC. Retrieved 13 March 2020.
  10. "Saskatchewan's third area code will be 474". CBC. Retrieved 13 March 2020.
  11. Stecklein, Janelle. "Central Oklahoma adding 572 area code". Norman Transcript. Retrieved 13 March 2020.
  12. "NANPA : Number Resources - NPA (Area) Codes".
  13. http://www.nanpa.com/pdf/TFN_Exhaust_Letter_100814.pdf
  14. David B. Caruso (2011-04-20). "Hot numbers when you least expect them". Associated Press. Retrieved 2013-11-07.
  15. Area Codes in Southeast Pennsylvania
  16. "Columbia to Get New Telephone Area Code: 839". WLTX. Retrieved 13 March 2020.
  17. "New 840 area code for phone numbers will eventually be added to the 909". Fontana Herald News. Retrieved 13 March 2020.
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