List of area code overlays

An area code overlay is a North American area code which is located in the same geographic location as at least one other area code. They are determined and regulated as part of the North American Numbering Plan to increase the number of available phone numbers in a province, state or region.

List of area code overlays

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There has been a flood of new North American area codes since 1995, much of it driven by fragmentation of numbering resources as a growing array of competitive local exchange carriers each obtain huge blocks of numbers in each rate centre in which they intend to offer new service.

The North American Numbering Plan Administration maintains the definitive list of overlay plans of current and proposed area codes and overlays in the United States.

Current

Seven-digit local dialing has been broken by overlay plan implementations in the following areas:

overlay	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.
281, 346, and 832	713	Greater Houston, Texas.
272	570	Northeastern Pennsylvania, including the cities of Scranton, Wilkes-Barre and Williamsport.
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.
339	781	suburban Boston, Massachusetts and most of the South Shore region.
343	613	Ottawa and Eastern Ontario.
347	718	The Bronx and Queens boroughs of New York City, and Marble Hill, a Manhattan neighborhood physically attached to The Bronx..
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.
380	614	Columbus, Ohio, and suburbs. (Effective February, 2016.)
385	801	along the Wasatch Front of Utah, including Salt Lake City, Provo–Orem, 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	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.
646	212	Manhattan borough of New York City, except for Marble Hill.
657	714	northern Orange County, California.
669	408	South Bay Area in California, encompassing much of Santa Clara County and Silicon Valley.
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.
747	818	Los Angeles, California area.
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.
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, 347, 718, 646, and 929	New York City's five boroughs (Brooklyn, Manhattan, Queens, Staten Island, and the Bronx), primarily for cellular phones, pagers, and voicemail machines.
930	812	southern Indiana.
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

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

• 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.
• 564 planned for Washington area code 253; this plan is suspended, as 253 is not estimated for exhaustion until 2025.
• 672 is proposed as a future overlay in British Columbia after 236 is exhausted.
• 679, planned to overlay 313 in Michigan.
• 680 is planned to overlay 315 in North Central NY. Anticipated start is 1Q 2017.
• 742 is reserved as a future overlay for 905.
• 825 is proposed as a future overlay in Alberta after 587 is exhausted.
• 833 is proposed to overlay non-geographic toll-free codes 800 and 844 through 888 in mid-2017, largely due to failure of the Federal Communications Commission to enforce its regulations regarding hoarding, brokering or warehousing toll-free numbers.
• 835 is proposed to overlay 610 and 484. This plan has been suspended by the Pennsylvania Public Utilities Commission.
• 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, but withdrawn.

See also

• Overlay plan