Phone prefixes in Sainte-Justine, QC

In numbers

In-service prefixes

4

Telephone numbers covered

40,000

Carriers

3

Area codes

2

Provinces and territories

1

First assignment

May 31, 2012

Most recent assignment

December 19, 2018

Sainte-Justine’s share of its area codes

Within area code 581, Sainte-Justine accounts for only 3 of 778 prefixes (0.4%): the code is dominated by Quebec and spread over 232 rate centres. Within area code 418, Sainte-Justine accounts for only 1 of 777 prefixes (0.1%): the code is dominated by Quebec and spread over 258 rate centres.

Who holds these numbers

Videotron Ltd. holds the largest share at 2 prefixes, 50.0% of the total, ahead of 2 other carriers. Code by code: in 581, Videotron Ltd. leads with 2 of 3 prefixes ahead of 1 others; Sogetel Inc. is the only holder in 418. No carrier holds prefixes in every one of Sainte-Justine’s 2 area codes, while 3 appear in just one.

Wireless and wireline

None of Sainte-Justine’s holders carries a mobility brand in its registered name: all 4 prefixes belong to wireline or wholesale carriers, among them Videotron Ltd, Sogetel Inc and TELUS Quebec. A call showing a Sainte-Justine number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Sainte-Justine’s dated assignments run from 2012 to 2018. The busiest period was 2015–2019, when 2 prefixes went to 1 carrier. 1 prefixes (25%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. No prefix has been added since 2020: demand for numbers in Sainte-Justine is flat.

Sainte-Justine’s oldest prefixes, the ones the register leaves undated, belong to Sogetel Inc: this carrier made up the landscape before competition arrived. The first dated assignment went to TELUS Quebec in 2012. The most recent arrivals are Videotron Ltd. (2016) and TELUS Quebec (2012), a sign that new carriers are still asking for numbers in Sainte-Justine.

Sainte-Justine has just 4 prefixes (40,000 numbers): a very small rate centre, typical of a village or rural area served by a single switching office.

Videotron Ltd. leads with 50.0% of the prefixes, but 2 competitors have set up in Sainte-Justine: a market where the incumbent keeps the edge without exclusivity.

Allocation is mature: only 0.0% of the dated prefixes are less than ten years old, most having been handed out in 2015–2019, and 1 prefixes go back to the undated monopoly era. New Sainte-Justine numbers mostly come out of blocks that were assigned long ago.

1 undated in the register.

Dialling a Sainte-Justine number

Sainte-Justine is served by 2 overlaid area codes (581 and 418). A 418 number is no more “out of town” than a 581 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Sainte-Justine shares area codes 581 and 418 with at least 20 other rate centres, including Quebec, Chicoutimi, Rimouski, Alma, Riviere-du-Loup, Thetford Mines, Levis and Saint-Georges-de-Beauce. The largest of them, Quebec, holds 245 prefixes in 418 and 581; the smallest on the list, Chibougamau, has just 11.

What a Sainte-Justine number tells you

A number attached to Sainte-Justine tells you that its prefix was issued to a carrier for this rate centre in Quebec, most often Videotron Ltd.. It does not tell you where the handset is today: a subscriber may have ported the number to any of the 3 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 Sainte-Justine: code 581-771 is recorded for Videotron Ltd., so every 581-771-XXXX number (10,000 possible) descends from that assignment. “Sainte-Justine, Quebec” there names a rate centre, not a municipality, and several area codes overlay it.

Every Sainte-Justine prefix

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

Had a call from a Sainte-Justine number?

No clear pattern in reports on these numbers yet. If a call worried you:

1. Call back on a number you trust

   If a caller says they are your bank, the Canada Revenue Agency, a courier or your phone company, hang up and call the organization on the number from its website or your statement, never the number that called you. Caller ID can be faked.

2. Report the fraud

   Report the call or text to the Canadian Anti-Fraud Centre online or at 1-888-495-8501. If you lost money or gave out personal details, tell your bank first, then your local police.

   Report to the Canadian Anti-Fraud Centre ↗

3. Register on the National Do Not Call List

   Registering a landline or mobile on the National DNCL is free. Registered charities, political parties, newspapers and companies you already do business with may still call.

   National Do Not Call List ↗Who can still call you ↗

4. Forward suspicious texts to 7726

   Forward a scam or spam text to 7726 (SPAM on the keypad). It's free, and your carrier uses it to block the sender. Don't tap links or reply.

   Get Cyber Safe: forwarding to 7726 ↗

Allocated prefixes

All 4 in-service prefixes, grouped by rate centre.

Elsewhere in Quebec