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.Haar, Dan and Vanessa Hua. "Regulators Have Area Code Plan". The Courant. August 18, 1999. Accessed October 28, 2005.
__NOTOC__ Overlay area codes Location Notes Added Base557314St. Louis, Missouri (communities such as, but not limited to, St. Louis, Overland, Bridgeton, Florissant, Webster Groves, Creve Coeur, Kirkwood and Sappington)Initial overlay area code plan was announced October 24, 2000. New 557 area code was announced in February 2022 and went into effect August 12, 2022.324904Jacksonville, Jacksonville Beach, Fernandina Beach, Orange Park and surrounding communities 220 740 Central and southeastern Ohio 223 717 South Central Pennsylvania 224 847 Northern suburbs of Chicago, Illinois 226, 382, 548 519 Southwestern Ontario 234 330 Akron-Canton and Warren-Youngstown areas in Ohio 236, 672, 778 604, 250 British Columbia 227, 240 301 Washington, D.C. suburbs and panhandle of Maryland 249 705 Northeastern and central Ontario 267, 445 215 Philadelphia, Pennsylvania area and a small portion of its Pennsylvania suburbs 272 570 Northeastern Pennsylvania, including the cities of Scranton, Wilkes-Barre, and Williamsport 279 916 Sacramento, California and surrounding suburbs 281, 346, 621, 832 713 Greater Houston, Texas 289, 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 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 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, 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 BronxMadison, Linc. "LincMad's Area Code Locator Table". LincMad. September 29, 2005. Accessed October 28, 2005. 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 367, 581 418 Eastern Quebec 368, 587, 825 780, 403 Alberta 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, 647 416 Toronto, Ontario 438 514 Island of Montreal, Quebec 442 760 Southeastern California 443, 667 410 Baltimore metropolitan area and the Eastern Shore of Maryland 447 217 Central Illinois 448 850 Florida Panhandle, including Tallahassee and Pensacola 458 541 Most of Oregon, excluding its northwestern part 464 708 Near western suburbs and southern suburbs of Chicago 469, 972 214 Eastern portion of the Dallas–Fort Worth metroplex in and around Dallas, Texas 470, 678 404, 770 Atlanta metropolitan area, Georgia 474 306 Saskatchewan 475 203 Southwestern Connecticut 480, 623 602 Arizona (Phoenix metropolitan area; primarily the city of Phoenix) Originally split into separate area codes in 1999, then recombined in 2023 into an overlay complex for the Phoenix metropolitan area 484 610 Eastern and parts of southeastern Pennsylvania 531 402 Eastern Nebraska 534 715 Northern Wisconsin 539 918 Northeastern Oklahoma 551 201 Northeastern New Jersey 564 360 Western Washington 564 initially overlays only 360, but will expand to overlay 206, 253, and 425 as those area codes run out of numbers 567 419 Northwestern Ohio, including Toledo and Lima 571 703 Northern Virginia 572 405 Central Oklahoma, including greater Oklahoma City 582 814 Central and western Pennsylvania, including Altoona, DuBois, and Erie 587 403, 780 Alberta 628 415 San Francisco, Marin County and small portions of San Mateo County 629 615 Nashville, Tennessee 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 672 604, 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, 983 303 Denver metropolitan area, Colorado 725 702 Clark County, Nevada 726 210 San Antonio, Texas 737 512 Austin, Texas 743 336 Piedmont Triad, North Carolina including Greensboro, Winston-Salem, and western areas of the Raleigh-Durham metropolitan area. 747 818 San Fernando Valley, California 754 954 Broward County, Florida 769 601 Central Mississippi 771 202 Washington, D.C. 774 508 South-central and most of southeastern Massachusetts, including Cape Cod and the Islands 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, 645 305 Miami-Dade County, Florida and the Florida Keys801385Salt Lake City 820 805 Ventura, Santa Barbara and San Luis Obispo Counties in California 825 403, 780 Alberta 829, 849 809 Dominican Republic 839 803 Central South Carolina 840 909 Pomona Valley and western San Bernardino County, CA 848 732 Central New Jersey 857 617 Boston, Cambridge and Quincy, Massachusetts 858 619 San Diego, CA and surrounding area 862 973 Northern New Jersey 872 312, 773 Chicago, Illinois 873 819 Gatineau and western Quebec 878 412, 724 Metro Pittsburgh, Pennsylvania 917 212, 332, 347, 646, 718, 929 The entirety of New York City (The Bronx, Brooklyn, Manhattan, Queens, and Staten Island) Originally primarily for cellular phones and pagers 930 812 Southern Indiana 934 631 Suffolk County, New York 938 256 Northern Alabama 939 787 Puerto Rico 469, 972, 945 214 Eastern greater Dallas-Fort Worth, TX 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 Charlotte metropolitan area, North Carolina 984 919 Raleigh-Durham, North Carolina metropolitan area 986 208 Idaho624716New York (Buffalo, Niagara Falls, Olean, and parts of Western New York)
See also List of North American Numbering Plan area codes List of future North American area codes Original North American area codes Telephone numbers in the Americas
References