Area code 343

Area code 343 holds 641 in-service central-office prefixes in the CNAC register, covering roughly 6,410,000 telephone numbers. They are split between 26 carriers and 116 rate centres. The largest is Ottawa-Hull. Recorded assignments run from November 20, 2009 to April 17, 2026. That ranks it 30 of 55 Canadian area codes by prefix count.

Background reading: Caller ID spoofing, STIR/SHAKEN, and how to actually block calls in Canada · Canadian area codes, overlays, and what a 416 number actually tells you · One-ring scams and the Caribbean area codes that look Canadian

In numbers

In-service prefixes: 641
Telephone numbers covered: 6,410,000
Carriers: 26
Rate centres: 116
Provinces and territories: 2
First assignment: November 20, 2009
Most recent assignment: April 17, 2026

Who holds these numbers

Fibernetics Corporation holds the largest share at 92 prefixes, 14.4% of the total, ahead of 25 other carriers.

Carrier	Prefixes	Share	First assigned
Fibernetics Corporation	92	14.4 %	2009
TELUS Integrated Communications	83	12.9 %	2010
Iristel Inc.	67	10.5 %	2013
Distributel	65	10.1 %	2013
TekSavvy Solutions Inc	53	8.3 %	2015
ISP Telecom Inc.	41	6.4 %	2012
InnSysVoice Corp	33	5.1 %	2015
Bell Mobility	28	4.4 %	2014
Videotron Ltd.	28	4.4 %	2011
Bell Canada	22	3.4 %	2013
Nexicom Telecommunications Inc	22	3.4 %	2018
Comwave Networks	16	2.5 %	2013
IXICA Communications Inc.	16	2.5 %	2018
TELUS Mobility	15	2.3 %	2010
Rogers Communications Canada Inc. (Wireless)	13	2.0 %	2012
Zayo Canada Inc.	13	2.0 %	2012
Cogeco Connexion Inc.	10	1.6 %	2023
Fido Solutions Inc.	6	0.9 %	2013
Rogers Communications Canada Inc. (Cable)	6	0.9 %	2013
ExaTEL Inc.	3	0.5 %	2016
Westport Telephone Company Limited	3	0.5 %	2020
Primus Telecommunications Canada Inc.	2	0.3 %	2016
Bragg Communications Inc.	1	0.2 %	2015
NRTC Communications	1	0.2 %	2021
Rogers Communications Canada Inc.	1	0.2 %	2019
Roxborough Telephone Company Ltd.	1	0.2 %	2013

Where these numbers land

Prefixes in 343 serve 116 rate centres. A rate centre is the billing area a prefix is attached to, not where the handset is.

Rate centre	Province	Prefixes	Carriers
Ottawa-Hull	ON	104	18
Kingston	ON	23	15
Cornwall	ON	22	14
Belleville	ON	19	14
Brockville	ON	17	11
Bancroft	ON	13	9
Kanata-Stittsville	ON	12	10
Jockvale	ON	10	6
Merrickville	ON	10	7
Carleton Place	ON	9	6
Smiths Falls	ON	9	6
Hawkesbury	ON	8	5
Orleans	ON	8	7
Vankleek Hill	ON	8	6
Alfred	ON	7	7
Rockland	ON	7	7
Tweed	ON	7	6
Arnprior	ON	6	5
Bloomfield	ON	6	6
Brighton	ON	6	6
Casselman	ON	6	6
Frankford	ON	6	6
Napanee	ON	6	6
Northbrook	ON	6	6
Pakenham	ON	6	5
Pembroke	ON	6	5
Picton	ON	6	6
Richmond	ON	6	6
Wellington	ON	6	6
Almonte	ON	5	5
Arden	ON	5	5
Carp	ON	5	5
Chesterville	ON	5	5
Clarence Creek	ON	5	5
Cumberland	ON	5	5
Deseronto	ON	5	5
Embrun	ON	5	5
Gloucester	ON	5	5
Kemptville	ON	5	5
Madoc	ON	5	5
Marmora	ON	5	5
Maynooth	ON	5	5
Morrisburg	ON	5	5
Perth	ON	5	2
Plevna	ON	5	5
Russell	ON	5	5
Stirling	ON	5	5
Trenton	ON	5	5
Winchester	ON	5	5
Alexandria	ON	4	4
Bath	ON	4	4
Bourget	ON	4	4
Cardiff	ON	4	4
Coe Hill	ON	4	4
Constance Bay	ON	4	4
Crysler	ON	4	4
Denbigh	ON	4	4
Gananoque	ON	4	4
Iroquois	ON	4	4
Manotick	ON	4	4
Metcalfe	ON	4	4
Navan	ON	4	4
Odessa	ON	4	4
Plantagenet	ON	4	4
Seeleys Bay	ON	4	4
South Mountain	ON	4	4
Wooler	ON	4	4
Adolphustown	ON	3	3
Delta	ON	3	3
Enterprise	ON	3	3
Gilmour	ON	3	3
Harrowsmith	ON	3	3
Ingleside	ON	3	3
Inverary	ON	3	3
L'Orignal	ON	3	3
Lancaster	ON	3	3
Maxville	ON	3	3
North Gower	ON	3	3
Osgoode	ON	3	3
Selby	ON	3	3

How the allocation was built up

Period	Prefixes	Carriers
2005–2009	1	1
2010–2014	66	15
2015–2019	327	21
2020–2024	218	15
2025–2029	29	7

Overlay area codes

343 shares its rate centres with 613, 753, 204, 236, 819, 250, 468, 672, 778, 782, 873, 902. Overlay codes cover the same ground, which is why ten-digit dialling is required: two neighbours on one street can hold different area codes.

Allocated prefixes

Showing 280 of 641 prefixes, largest rate centres first.

Ottawa-Hull, ON

343-202 · 343-203 · 343-204 · 343-209 · 343-224 · 343-227 · 343-244 · 343-254 · 343-262 · 343-291

Kingston, ON

343-266 · 343-290 · 343-293 · 343-302 · 343-305 · 343-306 · 343-323 · 343-333 · 343-344 · 343-358

Cornwall, ON

343-288 · 343-301 · 343-309 · 343-314 · 343-316 · 343-319 · 343-330 · 343-356 · 343-370 · 343-431

Belleville, ON

343-261 · 343-263 · 343-270 · 343-355 · 343-362 · 343-367 · 343-403 · 343-453 · 343-459 · 343-461

Brockville, ON

343-225 · 343-260 · 343-264 · 343-300 · 343-307 · 343-320 · 343-327 · 343-480 · 343-501 · 343-504

Bancroft, ON

343-269 · 343-357 · 343-401 · 343-404 · 343-476 · 343-709 · 343-720 · 343-755 · 343-943 · 343-944

Kanata-Stittsville, ON

343-308 · 343-326 · 343-353 · 343-359 · 343-386 · 343-490 · 343-499 · 343-545 · 343-667 · 343-690

Jockvale, ON

343-212 · 343-303 · 343-312 · 343-313 · 343-385 · 343-465 · 343-513 · 343-547 · 343-618 · 343-772

Merrickville, ON

343-257 · 343-337 · 343-338 · 343-339 · 343-340 · 343-389 · 343-485 · 343-527 · 343-896 · 343-901

Carleton Place, ON

343-213 · 343-285 · 343-296 · 343-375 · 343-429 · 343-430 · 343-503 · 343-763 · 343-899

Smiths Falls, ON

343-509 · 343-564 · 343-608 · 343-654 · 343-800 · 343-801 · 343-802 · 343-881 · 343-903

Hawkesbury, ON

343-215 · 343-470 · 343-500 · 343-512 · 343-514 · 343-518 · 343-606 · 343-695

Orleans, ON

343-221 · 343-350 · 343-393 · 343-489 · 343-528 · 343-689 · 343-780 · 343-880

Vankleek Hill, ON

343-304 · 343-331 · 343-342 · 343-448 · 343-473 · 343-748 · 343-842 · 343-886

Alfred, ON

343-201 · 343-298 · 343-371 · 343-454 · 343-520 · 343-691 · 343-789

Rockland, ON

343-200 · 343-398 · 343-412 · 343-458 · 343-495 · 343-531 · 343-785

Tweed, ON

343-234 · 343-426 · 343-471 · 343-642 · 343-731 · 343-743 · 343-797

Arnprior, ON

343-347 · 343-373 · 343-515 · 343-566 · 343-761 · 343-973

Bloomfield, ON

343-407 · 343-560 · 343-713 · 343-744 · 343-752 · 343-857

Brighton, ON

343-271 · 343-315 · 343-408 · 343-714 · 343-734 · 343-933

Casselman, ON

343-377 · 343-523 · 343-563 · 343-765 · 343-891 · 343-895

Frankford, ON

343-255 · 343-413 · 343-638 · 343-718 · 343-735 · 343-751

Napanee, ON

343-267 · 343-276 · 343-295 · 343-478 · 343-662 · 343-893

Northbrook, ON

343-232 · 343-272 · 343-419 · 343-724 · 343-739 · 343-863

Pakenham, ON

343-258 · 343-318 · 343-395 · 343-493 · 343-537 · 343-798

Pembroke, ON

343-369 · 343-544 · 343-567 · 343-609 · 343-614 · 343-620

Picton, ON

343-222 · 343-420 · 343-562 · 343-687 · 343-725 · 343-740

Richmond, ON

343-351 · 343-397 · 343-494 · 343-530 · 343-784 · 343-902

Wellington, ON

343-427 · 343-677 · 343-732 · 343-745 · 343-749 · 343-865

Almonte, ON

343-372 · 343-464 · 343-521 · 343-760 · 343-890

Arden, ON

343-268 · 343-406 · 343-559 · 343-712 · 343-856

Carp, ON

343-240 · 343-376 · 343-491 · 343-516 · 343-764

Chesterville, ON

343-378 · 343-524 · 343-629 · 343-647 · 343-766

Clarence Creek, ON

343-210 · 343-379 · 343-455 · 343-533 · 343-767

Cumberland, ON

343-299 · 343-348 · 343-382 · 343-535 · 343-769

Deseronto, ON

343-265 · 343-287 · 343-510 · 343-582 · 343-822

Embrun, ON

343-383 · 343-456 · 343-525 · 343-759 · 343-770

Gloucester, ON

343-349 · 343-384 · 343-526 · 343-546 · 343-771

Kemptville, ON

343-334 · 343-387 · 343-519 · 343-774 · 343-877

Madoc, ON

343-229 · 343-414 · 343-472 · 343-721 · 343-736

Allocation source: Canadian Numbering Administrator (CNAC), the registry that records which carrier a central-office code was originally issued to. An allocation says who was issued the prefix, not who serves the number today: numbers can be ported between carriers, and caller ID can be spoofed outright.