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CLLI (Common Language location identifier) codes identify elements of the North American telephone network. In Toronto (NPA 416), Bell Canada uses the following codes for central offices (exchanges) where switches are located. The area served by a central office is a wire centre. Rate centres are the basis of local calling areas and long distance charges.
The 2 Letter 5 Digit column shows current assignments of the 2L-5D named prefixes that have existed since the 1950s. Some wire centre boundaries and prefixes have changed over time. Most central offices now use additional prefixes.
The historical exchanges Agincourt, Don Mills, Islington, New Toronto, Scarborough, West Hill, Weston, and Willowdale were merged into the Toronto exchange in 1977.
| CO CLLI | Rate Centre | Wire Centre | 2 Letter 5 Digit Prefix |
|---|---|---|---|
| TOROON01 | Toronto | Adelaide | 36–EMpire, 86–UNiversity, 870 |
| TOROON02 | Toronto | Asquith | 92–WAlnut, 96 |
| TOROON03 | Toronto (also Don Mills) | Donlands | 42–GArden |
| TOROON04 | Toronto | Main St | 69–OXford |
| TOROON05 | Toronto | Simpson | 46–HOward |
| TOROON06 | Toronto | Eglinton | 48–HUdson |
| TOROON07 | Toronto | Ridelle | 78–RUssell/STerling (Willowdale/Weston) |
| TOROON08 | Toronto | Runnymede | 76–ROger |
| TOROON09 | Toronto | Dufferin | 53–LEnnox |
| TOROON10 | Toronto | Rogers Rd | 65 |
| TOROON21 | Toronto (Agincourt) | Sheppard | 29–AXminster/CYpress (zone) 1-2-3-5-7-8-9 |
| TOROON26 | Toronto (Islington) | Eagle | 23–BElmont/CEdar 1-2-3-4-6-7-9 |
| TOROON27 | Toronto (New Toronto) | 180 Islington | 25–CLifford 1-2-3-5-9 |
| TOROON29 | Toronto (Islington), Cooksville | Old Burnhamthorpe | 62 |
| TOROON35 | Toronto (Scarborough) | St Clair | 26–AMherst 1-4-5-6-7-9 |
| TOROON36 | Toronto (Scarborough) | Victoria Park | 75–PLymouth 0-1-2-5-7-9 |
| TOROON42 | Toronto (West Hill) | Orchard Park | 28–ATlantic 0-1-2-3-4-6-7 |
| TOROON43 | Toronto (Weston) | 2664 Islington | 74 |
| TOROON44 | Toronto (Weston) | Bellevue | 24–CHerry |
| TOROON45 | Toronto (Weston) | Acton | 63–MElrose |
| TOROON46 | Toronto (Don Mills) | Don Mills | 44–HIckory |
| TOROON47 | Toronto (Willowdale) | Finch | 22–BAldwin/ACademy (Toronto) |
| TOROON48 | Toronto (Willowdale) | Ernest | 49 |
| TOROON50 | Toronto (Agin./Scar./W. Hill) | Lawrence | 43 |
| TOROON61 | Toronto (Weston), Thornhill | Alness | 66 |
| TOROON63 | Toronto | Simcoe | 59 |
| TOROON66 | Toronto (Agincourt) | Borough Dr | |
| The following nearby exchanges were switched to NPA 905 in October 1993. | |||
| BMTNON13 | Brampton | John | 45–GLendale 0-1-2-3-4-5-6-7-9 |
| CKSNON16 | Clarkson | 82–TAylor 2-3 | |
| CKVLON17 | Cooksville | Dundas | 27 0-2-3-5-6-7-9 (was 28–ATwater 9) |
| SPNGON18 | South Pickering (Dunbarton) | 83–TEmple 1-7-9 | |
| GRTWON19 | Georgetown | 87–TRiangle 3-7 | |
| KNBGON21 | Kleinburg | (was 29–CYpress 6) | |
| MALTON22 | Malton | Derry | (was 27–BRowning 7, then 28–BUtler 6) |
| MAPLON23 | Maple | (was 25–ALpine 7) | |
| MRHMON24 | Markham | ||
| MLTNON25 | Milton | 87–TRiangle 5-6-8 | |
| OKVLON30 | Oakville | Balsam | 84–VIctor 2-4-5-9 |
| PTCDON33 | Port Credit | 27–CRescent 1-4-8 | |
| RMHLON34 | Richmond Hill | 88–TUrner 3-4 | |
| BMTNON37 | Brampton, Castlemore | Walker | |
| SSVLON39 | Streetsville | Pearl | 82–TAylor 1-6 |
| TNHLON40 | Thornhill | (was 28–AVenue 5) | |
| WDBGON48 | Woodbridge | (was 28–ATlas 8) | |
| SSVLON52 | Streetsville | Aquitaine | |
| OKVLON54 | Oakville | Bronte | 82–VAlley 5-7-9 |
| UNVLON55 | Unionville | ||
| PCNGON62 | Ajax-Pickering | ||
| ERMLON65 | Streetsville | Erin Mills | 82 0-8 |
| AURRON91 | Aurora | 72–PArkview 6-7 | |
| WTBYON94 | Whitby | 66–MOhawk 5-6-8 | |
| OSHWON95 | Oshawa | 72–RAndolph 0-1-3-5-8 | |
A discussion of CLLI usage can be found in the TELECOM Digest archives.
The Canadian Numbering Administrator has some useful current information.
From 1923 to 1958, 2 Letter 4 Digit (2L-4D) dialing was used in Toronto. Here are the old prefixes for the Toronto exchange.
| 2 Letter 4 Digit Prefix | Replaced by | Date |
|---|---|---|
| 23–ADelaide | 36–EMpire 3 | 1951 |
| 35–ELgin | 36–EMpire 4 | 1951 |
| [new] | 78–RUssell 1 | 1952 |
| 75–PLaza | 36–EMpire 6 | 1952-03-16 |
| 92–WAverley | 36–EMpire 8 | 1953-03-22 |
| 48–HUdson | 48–HUdson 8 | 1953-03-22 |
| 49–HYland | 48–HUdson 9 | 1953-03-22 |
| 72–RAndolph | 92–WAlnut 1 | 1954-03-21 |
| 54–KIngsdale | 92–WAlnut 2 | 1954-03-21 |
| 64–MIdway | 92–WAlnut 3 | 1954-03-21 |
| 77–PRincess | 92–WAlnut 4 | 1954-03-21 |
| 46–HOward | 69–OXford 1 | 1955-03-20 |
| 47–GRover | 69–OXford 4 | 1955-03-20 |
| 69–OXford | 69–OXford 9 | 1955-03-20 |
| 68–MUrray | 76–ROger 2 | 1955-03-20 |
| 76–ROdney | 76–ROger 6 | 1955-03-20 |
| 59–LYndhurst | 76–ROger 7 | 1955-03-20 |
| 58–JUnction | 76–ROger 9 | 1955-03-20 |
| 87–TRinity | 86–UNiversity 1 | 1955-03-20 |
| 63–MElrose | 53–LEnnox 1 | 1956-03-18 |
| 52–LAkeside | 53–LEnnox 2 | 1956-03-18 |
| 53–KEnwood | 53–LEnnox 3 | 1956-03-18 |
| 65–OLiver | 53–LEnnox 4 | 1956-03-18 |
| 55–LLoydbrook | 53–LEnnox 5 | 1956-03-18 |
| 56–LOmbard | 53–LEnnox 6 | 1956-03-18 |
| 74–RIverdale | 46–HOward 1 | 1957-03-17 |
| 43–GErrard | 46–HOward 3 | 1957-03-17 |
| 45–GLadstone | 46–HOward 5 | 1957-03-17 |
| 42–HArgrave | 46–HOward 6 | 1957-03-17 |
| 66–MOhawk | 48–HUdson 3 | 1958-03-16 |
| 62–MAyfair | 48–HUdson 5 | 1958-03-16 |
| 67–ORchard | 78–RUssell 2 | 1958-03-16 |
| 73–REdfern | 78–RUssell 3 | 1958-03-16 |
| [new CO] | 42–GArden 1 | 1960 |
Named prefixes were phased out in favor of All Number Calling (ANC) between 1961 and 1966.
Source: The Telephone EXchange Name Project
and David Leibold's Toronto exchange history, with some assistance from Hugh Hamilton
See also Montreal telephone exchange geography.
2004-09-05 Justin Bur / last rev. 2006-02-03