Phone prefixes in Beauharnois, QC

In numbers

In-service prefixes

11

Telephone numbers covered

110,000

Carriers

7

Area codes

2

Provinces and territories

1

First assignment

March 8, 2001

Most recent assignment

July 29, 2021

Beauharnois’s share of its area codes

Within area code 450, Beauharnois accounts for only 9 of 775 prefixes (1.2%): the code is dominated by Granby and spread over 129 rate centres. Within area code 579, Beauharnois accounts for only 2 of 644 prefixes (0.3%): the code is dominated by Granby and spread over 126 rate centres.

Who holds these numbers

TELUS Mobility holds the largest share at 3 prefixes, 27.3% of the total, ahead of 6 other carriers. Code by code: in 450, TELUS Mobility leads with 3 of 9 prefixes ahead of 4 others; in 579, Fibernetics Corporation leads with 1 of 2 prefixes ahead of 1 others. No carrier holds prefixes in every one of Beauharnois’s 2 area codes, while 7 appear in just one.

Wireless and wireline

3 of Beauharnois’s 11 prefixes (27.3%) are held by carriers whose registered name marks a wireless business: TELUS Mobility. Wireline prefixes still outnumber them, carried by Bell Canada, Videotron Ltd, Comwave Networks and Fibernetics Corporation. This is a sort by name, not a licence lookup, and a mobile prefix may have been ported to another network since.

How the allocation was built up

Beauharnois’s dated assignments run from 2001 to 2021. The busiest period was 2005–2009, when 3 prefixes went to 3 carriers. 3 prefixes (27%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 1 prefixes have been added, so the rate centre is still growing.

Beauharnois’s oldest prefixes, the ones the register leaves undated, belong to Bell Canada and TELUS Mobility: these carriers made up the landscape before competition arrived. The first dated assignment went to TELUS Mobility in 2001. The most recent arrivals are Fibernetics Corporation (2021), TELUS Quebec (2019) and Comwave Networks (2013), a sign that new carriers are still asking for numbers in Beauharnois.

Beauharnois 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 Beauharnois: the leader, TELUS Mobility, holds only 27.3% 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.

Allocation is mature: only 12.5% of the dated prefixes are less than ten years old, most having been handed out in 2005–2009, and 3 prefixes go back to the undated monopoly era. New Beauharnois numbers mostly come out of blocks that were assigned long ago.

3 undated in the register.

Dialling a Beauharnois number

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

The numbering neighbourhood

Beauharnois shares area codes 450 and 579 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 Beauharnois number tells you

A number attached to Beauharnois tells you that its prefix was issued to a carrier for this rate centre in Quebec, most often TELUS Mobility. 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 Beauharnois: code 450-268 is recorded for TELUS Mobility, so every 450-268-XXXX number (10,000 possible) descends from that assignment. “Beauharnois, Quebec” there names a rate centre, not a municipality, and several area codes overlay it.

Every Beauharnois prefix

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

Allocated prefixes

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

Elsewhere in Quebec