Phone prefixes in Sept-Iles, QC

In numbers

In-service prefixes

20

Telephone numbers covered

200,000

Carriers

10

Area codes

3

Provinces and territories

1

First assignment

January 15, 2001

Most recent assignment

December 15, 2025

Sept-Iles’s share of its area codes

Within area code 418, Sept-Iles accounts for only 9 of 777 prefixes (1.2%): the code is dominated by Quebec and spread over 258 rate centres. Within area code 581, Sept-Iles accounts for only 6 of 778 prefixes (0.8%): the code is dominated by Quebec and spread over 232 rate centres. Within area code 367, Sept-Iles accounts for only 5 of 232 prefixes (2.2%): the code is dominated by Quebec and spread over 110 rate centres.

Who holds these numbers

TELUS Quebec holds the largest share at 8 prefixes, 40.0% of the total, ahead of 9 other carriers. Code by code: in 418, TELUS Quebec leads with 6 of 9 prefixes ahead of 2 others; in 581, TELUS Quebec leads with 2 of 6 prefixes ahead of 3 others; in 367, Iristel Inc. leads with 1 of 5 prefixes ahead of 4 others. No carrier holds prefixes in every one of Sept-Iles’s 3 area codes, while 8 appear in just one.

Wireless and wireline

3 of Sept-Iles’s 20 prefixes (15.0%) are held by carriers whose registered name marks a wireless business: TELUS Mobility and Bell Mobility. Wireline prefixes still outnumber them, carried by TELUS Quebec, Iristel Inc, Bell Canada and Cogeco Connexion Inc. 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

Sept-Iles’s dated assignments run from 2001 to 2025. The busiest period was 2010–2014, when 4 prefixes went to 3 carriers. 4 prefixes (20%) 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.

Sept-Iles’s oldest prefixes, the ones the register leaves undated, belong to TELUS Quebec: this carrier made up the landscape before competition arrived. The first dated assignment went to TELUS Quebec in 2001. The most recent arrivals are Fibernetics Corporation (2025), ISP Telecom Inc. (2025) and Videotron Ltd. (2024), a sign that new carriers are still asking for numbers in Sept-Iles.

Sept-Iles has only 20 prefixes, or 200,000 numbers: a small rate centre, where the arrival of a single new carrier visibly changes the landscape.

TELUS Quebec leads with 40.0% of the prefixes, but 9 competitors have set up in Sept-Iles: a market where the incumbent keeps the edge without exclusivity.

Demand remains steady: 31.3% of the dated prefixes go back to the last ten years, the most active period being 2010–2014. The rate centre is growing at a regular rather than explosive pace.

4 undated in the register.

Dialling a Sept-Iles number

Sept-Iles is served by 3 overlaid area codes (418, 581 and 367). A 367 number is no more “out of town” than a 418 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Sept-Iles shares area codes 418, 581 and 367 with at least 20 other rate centres, including Quebec, Chicoutimi, Alma, Rimouski, Riviere-du-Loup, Thetford Mines, Sainte-Marie-de-Beauce and Levis. The largest of them, Quebec, holds 282 prefixes in 367, 418 and 581; the smallest on the list, Chandler, has just 13.

What a Sept-Iles number tells you

A number attached to Sept-Iles tells you that its prefix was issued to a carrier for this rate centre in Quebec, most often TELUS Quebec. It does not tell you where the handset is today: a subscriber may have ported the number to any of the 10 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 Sept-Iles: code 418-960 is recorded for TELUS Quebec, so every 418-960-XXXX number (10,000 possible) descends from that assignment. “Sept-Iles, Quebec” there names a rate centre, not a municipality, and several area codes overlay it.

Every Sept-Iles prefix

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

Allocated prefixes

All 20 in-service prefixes, grouped by rate centre.

Elsewhere in Quebec