Phone prefixes in Yamaska, QC

In numbers

In-service prefixes

7

Telephone numbers covered

70,000

Carriers

7

Area codes

2

Provinces and territories

1

First assignment

September 6, 2007

Most recent assignment

August 3, 2021

Yamaska’s share of its area codes

Within area code 579, Yamaska accounts for only 4 of 644 prefixes (0.6%): the code is dominated by Granby and spread over 126 rate centres. Within area code 450, Yamaska accounts for only 3 of 775 prefixes (0.4%): the code is dominated by Granby and spread over 129 rate centres.

Who holds these numbers

9164-3122 Quebec inc holds the largest share at 1 prefixes, 14.3% of the total, ahead of 6 other carriers. Code by code: in 579, Cooptel leads with 1 of 4 prefixes ahead of 3 others; in 450, 9164-3122 Quebec inc leads with 1 of 3 prefixes ahead of 2 others. No carrier holds prefixes in every one of Yamaska’s 2 area codes, while 7 appear in just one.

Wireless and wireline

None of Yamaska’s holders carries a mobility brand in its registered name: all 7 prefixes belong to wireline or wholesale carriers, among them 9164-3122 Quebec inc, Bell Canada, Cooptel and Fibernetics Corporation. A call showing a Yamaska number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Yamaska’s dated assignments run from 2007 to 2021. The busiest period was 2020–2024, when 3 prefixes went to 3 carriers. 1 prefixes (14%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 3 prefixes have been added, so the rate centre is still growing.

Yamaska’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 Videotron Ltd. in 2007. The most recent arrivals are Fibernetics Corporation (2021), Cooptel (2021) and ISP Telecom Inc. (2020), a sign that new carriers are still asking for numbers in Yamaska.

Yamaska has just 7 prefixes (70,000 numbers): a very small rate centre, typical of a village or rural area served by a single switching office.

No single carrier dominates Yamaska: the leader, 9164-3122 Quebec inc, holds only 14.3% of the prefixes against 6 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: 50.0% of the dated prefixes were assigned in the last ten years, peaking in 2020–2024. Yamaska is among the rate centres where demand for numbers is still rising quickly.

1 undated in the register.

Dialling a Yamaska number

Yamaska is served by 2 overlaid area codes (579 and 450). A 450 number is no more “out of town” than a 579 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Yamaska shares area codes 579 and 450 with at least 20 other rate centres, including Granby, Joliette, St-Jerome, St-Hyacinthe, Longueuil, Ste-Therese, Pont-Viau and Sorel. The largest of them, Granby, holds 51 prefixes in 450 and 579; the smallest on the list, Lachute, has just 17.

What a Yamaska number tells you

A number attached to Yamaska tells you that its prefix was issued to a carrier for this rate centre in Quebec, most often 9164-3122 Quebec inc. It does not tell you where the handset is today: a subscriber may have ported the number to any of the 7 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 Yamaska: code 450-362 is recorded for 9164-3122 Quebec inc, so every 450-362-XXXX number (10,000 possible) descends from that assignment. “Yamaska, Quebec” there names a rate centre, not a municipality, and several area codes overlay it.

Every Yamaska prefix

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

Allocated prefixes

All 7 in-service prefixes, grouped by rate centre.

Elsewhere in Quebec