Area codes 416, 647, and 437

416416, 647416, 647, 437647area code 416(416) and (647)437+1-416387416 and 647
Area codes 416, 647, and 437 are telephone area codes serving the single rate centre of Toronto, Ontario, Canada.wikipedia
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Area codes 613 and 343

613613, 343343
It was almost completely surrounded by Ontario's other area code, 613.
The 613 area originally covered all of Ontario with the exception of the Golden Horseshoe, which was in area code 416.

Foreign exchange service (telecommunications)

Foreign exchange stationforeign exchange officeFXO
Like the 212 and 312 area codes in New York and Chicago respectively, demand for 416 numbers for mobile, foreign exchange and voice over IP service in the "905 suburbs" (Durham, Peel, York and Halton regions) has made the numbers valuable as their local calling area is a superset of that of a suburban number.

Rate center

rate centre
Each competing carrier is assigned 10,000-number blocks (roughly corresponding to a single prefix) in each rate centre where it plans to offer service, regardless of their actual subscriber count.
A number in area code 416 is in the Toronto rate center, so local to everything between Oakville and Ajax; the suburban rate centers are less valuable as one suburb to another on the other side of the same city (Markham to Malton, for example) is often a toll call.

List of original NANP area codes

original area codesoriginal 86 area codesoriginal area code
The main area code, 416, was one of the 86 original area codes introduced in 1947.

Area codes 519, 226, and 548

519 and 226519519, 226
The western portion of 416 (including Kitchener) was combined with the southern portion of 613 to form area code 519 in 1953, leaving 416 largely coextensive with the area generally reckoned as the core of the Golden Horseshoe.
The main area code, 519, was created in 1953 from the western portion of 416 and the southwestern portion of 613.

Greater Toronto Area

Greater TorontoGTAToronto
Despite the Greater Toronto Area's rapid growth, this configuration remained for 40 years.
Before 1993, the GTA used the 416 area code.

Toronto

Toronto, OntarioToronto, CanadaToronto, ON
Area codes 416, 647, and 437 are telephone area codes serving the single rate centre of Toronto, Ontario, Canada.

Area codes 905, 289, and 365

905 and 289905905, 289, 365
Like the 212 and 312 area codes in New York and Chicago respectively, demand for 416 numbers for mobile, foreign exchange and voice over IP service in the "905 suburbs" (Durham, Peel, York and Halton regions) has made the numbers valuable as their local calling area is a superset of that of a suburban number. In 1993, the 416 territory was reduced to its current size when it was cut back to just Metro Toronto (York, East York, North York, Etobicoke, Scarborough and Old Toronto), while area code 905 was assigned to most of Toronto's suburbs; it almost completely surrounds 416. As of 2013, the following points in area code 905 were a local call to +1-416 Toronto: Ajax-Pickering, Aurora, Beeton, Bethesda, Bolton, Brampton, Caledon East, Campbellville, Castlemore, Claremont, Georgetown, Gormley, King City, Markham, Milton, Mississauga (rate centres Clarkson, Cooksville, Malton, Nobleton, Port Credit and Streetsville) Oak Ridges, Oakville, Palgrave, Richmond Hill, Schomberg, Snelgrove, South Pickering, Stouffville, Thornhill, Tottenham, Unionville, Uxbridge, Vaughan (rate centres Kleinburg, Maple and Woodbridge) and Victoria.
Area code 905 was assigned on October 4, 1993, as a split from area code 416.

Overlay plan

overlayoverlaidoverlay area code
Another option was an overlay area code covering the same area as 416.
Those are some of the reasons that the numbering plan areas corresponding to four of the five largest Canadian markets (416 in Toronto, 514 in Montreal, 604 in Vancouver, and 403 in Calgary) were split in the 1990s.

Ten-digit dialing

10-digit dialingten-digit diallingten digits
Overlays were a new concept at the time, and somewhat controversial due to the requirement for ten-digit dialling.
It has also failed to stop a pattern of some subscribers paying third-party resellers an artificially-high price for a number in a desirable original area code like Manhattan's 212 or Toronto's 416.

Golden Horseshoe

Greater Golden HorseshoeGolden Horseshoe areaGolden Horseshoe region
It covered most of the populous Golden Horseshoe region in southern Ontario, from Colborne to Niagara Falls to Kitchener-Waterloo.

York, Toronto

YorkYork TownshipCity of York
In 1993, the 416 territory was reduced to its current size when it was cut back to just Metro Toronto (York, East York, North York, Etobicoke, Scarborough and Old Toronto), while area code 905 was assigned to most of Toronto's suburbs; it almost completely surrounds 416.

Maestro (rapper)

Maestro Fresh WesMaestroMaestro Fresh-Wes
Toronto rapper Maestro rendered homage to the area code in his 1998 song "416/905 (TO Party Anthem)".
However, he returned to the Canadian charts in 1998, with the hit singles "Stick to Your Vision" and "416/905 (T.O. Party Anthem)".

North York

North York, OntarioNorth York, TorontoBorough of North York
In 1993, the 416 territory was reduced to its current size when it was cut back to just Metro Toronto (York, East York, North York, Etobicoke, Scarborough and Old Toronto), while area code 905 was assigned to most of Toronto's suburbs; it almost completely surrounds 416.

Etobicoke

Etobicoke, OntarioEtobicoke, ONEtobicoke, Toronto
In 1993, the 416 territory was reduced to its current size when it was cut back to just Metro Toronto (York, East York, North York, Etobicoke, Scarborough and Old Toronto), while area code 905 was assigned to most of Toronto's suburbs; it almost completely surrounds 416.

Scarborough, Toronto

ScarboroughScarborough, OntarioScarborough, ON
In 1993, the 416 territory was reduced to its current size when it was cut back to just Metro Toronto (York, East York, North York, Etobicoke, Scarborough and Old Toronto), while area code 905 was assigned to most of Toronto's suburbs; it almost completely surrounds 416. Additional named exchanges were created (as 2L+5N) in the late 1950s to accommodate expansion into then-growing suburbs such as Don Mills (GArden), Agincourt (AXminster/CYpress), Islington (BElmont/CEdar), New Toronto (CLifford), Scarborough (AMherst, PLymouth), West Hill (ATlantic), Weston (CHerry, MElrose) and Willowdale (BAldwin/ACademy).

Old Toronto

TorontoCity of Torontoold City of Toronto
In 1993, the 416 territory was reduced to its current size when it was cut back to just Metro Toronto (York, East York, North York, Etobicoke, Scarborough and Old Toronto), while area code 905 was assigned to most of Toronto's suburbs; it almost completely surrounds 416.

CLLI code

CLLIMALTON22
In some cases, 416 prefixes are available to wire centres outside Toronto city limits which serve Toronto subscribers (such as MALTON22 in Mississauga, which serves an airport hotel strip in Toronto).
It is in Peel Region and therefore in a different local interconnection region, a different area code (905 instead of 416) and different, multiple rate centres (Clarkson, Streetsville, Cooksville, Malton, Port Credit; Bell Canada has no named "Mississauga" exchange despite the city's incorporation in 1973).

Palgrave, Ontario

Palgrave
As of 2013, the following points in area code 905 were a local call to +1-416 Toronto: Ajax-Pickering, Aurora, Beeton, Bethesda, Bolton, Brampton, Caledon East, Campbellville, Castlemore, Claremont, Georgetown, Gormley, King City, Markham, Milton, Mississauga (rate centres Clarkson, Cooksville, Malton, Nobleton, Port Credit and Streetsville) Oak Ridges, Oakville, Palgrave, Richmond Hill, Schomberg, Snelgrove, South Pickering, Stouffville, Thornhill, Tottenham, Unionville, Uxbridge, Vaughan (rate centres Kleinburg, Maple and Woodbridge) and Victoria.

List of North American Numbering Plan area codes

List of NANP area codesList of North American area codesArea Codes
*List of North American area codes

Don Mills

Don Mills, OntarioDon Parkway(Ward 11) Don Parkway
Additional named exchanges were created (as 2L+5N) in the late 1950s to accommodate expansion into then-growing suburbs such as Don Mills (GArden), Agincourt (AXminster/CYpress), Islington (BElmont/CEdar), New Toronto (CLifford), Scarborough (AMherst, PLymouth), West Hill (ATlantic), Weston (CHerry, MElrose) and Willowdale (BAldwin/ACademy).

Telephone numbering plan

Area codeTelephone codearea codes
Area codes 416, 647, and 437 are telephone area codes serving the single rate centre of Toronto, Ontario, Canada.

Ontario

Ontario, CanadaONProvince of Ontario
Area codes 416, 647, and 437 are telephone area codes serving the single rate centre of Toronto, Ontario, Canada.

Bell Canada

BellBell Telephone Company of CanadaBCE
The incumbent local exchange carrier in the 416/647/437 territory is Bell Canada.