Phone prefixes in Knowlton, QC

In numbers

In-service prefixes

11

Telephone numbers covered

110,000

Carriers

9

Area codes

3

Provinces and territories

1

First assignment

August 14, 2013

Most recent assignment

August 21, 2025

Knowlton’s share of its area codes

Within area code 579, Knowlton accounts for only 8 of 644 prefixes (1.2%): the code is dominated by Granby and spread over 126 rate centres. Within area code 450, Knowlton accounts for only 2 of 775 prefixes (0.3%): the code is dominated by Granby and spread over 129 rate centres. Within area code 354, Knowlton accounts for only 1 of 56 prefixes (1.8%): the code is dominated by Valleyfield and spread over 49 rate centres.

Who holds these numbers

Bell Canada holds the largest share at 2 prefixes, 18.2% of the total, ahead of 8 other carriers. Code by code: in 579, Videotron Ltd. leads with 2 of 8 prefixes ahead of 6 others; Bell Canada is the only holder in 450; Cogeco Connexion Inc. is the only holder in 354. No carrier holds prefixes in every one of Knowlton’s 3 area codes, while 9 appear in just one.

Wireless and wireline

None of Knowlton’s holders carries a mobility brand in its registered name: all 11 prefixes belong to wireline or wholesale carriers, among them Bell Canada, Videotron Ltd, Cogeco Connexion Inc and Comwave Networks. A call showing a Knowlton number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Knowlton’s dated assignments run from 2013 to 2025. The busiest period was 2020–2024, when 4 prefixes went to 4 carriers. 2 prefixes (18%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 5 prefixes have been added, so the rate centre is still growing.

Knowlton’s oldest prefixes, the ones the register leaves undated, belong to Bell Canada: this carrier made up the landscape before competition arrived. The first dated assignment went to Comwave Networks in 2013. The most recent arrivals are Cogeco Connexion Inc. (2025), IXICA Communications Inc. (2021) and TELUS Quebec (2021), a sign that new carriers are still asking for numbers in Knowlton.

Knowlton has only 11 prefixes, or 110,000 numbers: a small rate centre, where the arrival of a single new carrier visibly changes the landscape.

No single carrier dominates Knowlton: the leader, Bell Canada, holds only 18.2% of the prefixes against 8 competitors, a sign of a highly fragmented market where cable companies, mobility brands and VoIP providers weigh as much as the incumbent.

Growth is recent: 55.6% of the dated prefixes were assigned in the last ten years, peaking in 2020–2024. Knowlton is among the rate centres where demand for numbers is still rising quickly.

2 undated in the register.

Dialling a Knowlton number

Knowlton is served by 3 overlaid area codes (579, 450 and 354). A 354 number is no more “out of town” than a 579 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Knowlton shares area codes 579, 450 and 354 with at least 20 other rate centres, including Granby, Joliette, St-Jerome, St-Hyacinthe, Longueuil, Ste-Therese, St-Lambert and Sorel. The largest of them, Granby, holds 52 prefixes in 354, 450 and 579; the smallest on the list, Beloeil, has just 17.

What a Knowlton number tells you

A number attached to Knowlton tells you that its prefix was issued to a carrier for this rate centre in Quebec, most often Bell Canada. It does not tell you where the handset is today: a subscriber may have ported the number to any of the 9 carriers present here or to a VoIP service usable anywhere. Nor does it tell you who is calling: caller ID can be spoofed, and a Quebec area code is easy to borrow to look local.

Reading a register entry for Knowlton: code 450-242 is recorded for Bell Canada, so every 450-242-XXXX number (10,000 possible) descends from that assignment. “Knowlton, Quebec” there names a rate centre, not a municipality, and several area codes overlay it.

Every Knowlton prefix

Each row is an in-service central-office code recorded for Knowlton, with its original holder and year of assignment.

Allocated prefixes

All 11 in-service prefixes, grouped by rate centre.

Elsewhere in Quebec