Phone prefixes in Roberval, QC

In numbers

In-service prefixes

11

Telephone numbers covered

110,000

Carriers

8

Area codes

3

Provinces and territories

1

First assignment

April 5, 2006

Most recent assignment

March 26, 2025

Roberval’s share of its area codes

Within area code 581, Roberval accounts for only 5 of 778 prefixes (0.6%): the code is dominated by Quebec and spread over 232 rate centres. Within area code 418, Roberval accounts for only 4 of 777 prefixes (0.5%): the code is dominated by Quebec and spread over 258 rate centres. Within area code 367, Roberval accounts for only 2 of 232 prefixes (0.9%): the code is dominated by Quebec and spread over 110 rate centres.

Who holds these numbers

Videotron Ltd. holds the largest share at 3 prefixes, 27.3% of the total, ahead of 7 other carriers. Code by code: in 581, Videotron Ltd. leads with 1 of 5 prefixes ahead of 4 others; in 418, Videotron Ltd. leads with 2 of 4 prefixes ahead of 2 others; in 367, Cogeco Connexion Inc. leads with 1 of 2 prefixes ahead of 1 others. No carrier holds prefixes in every one of Roberval’s 3 area codes, while 6 appear in just one.

Wireless and wireline

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

How the allocation was built up

Roberval’s dated assignments run from 2006 to 2025. The busiest period was 2005–2009, when 3 prefixes went to 2 carriers. 1 prefixes (9%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 2 prefixes have been added, so the rate centre is still growing.

Roberval’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 TELUS Quebec in 2006. The most recent arrivals are Cogeco Connexion Inc. (2025), ISP Telecom Inc. (2023) and Comwave Networks (2016), a sign that new carriers are still asking for numbers in Roberval.

Roberval 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 Roberval: the leader, Videotron Ltd., holds only 27.3% of the prefixes against 7 competitors, a sign of a highly fragmented market where cable companies, mobility brands and VoIP providers weigh as much as the incumbent.

Demand remains steady: 20.0% of the dated prefixes go back to the last ten years, the most active period being 2005–2009. The rate centre is growing at a regular rather than explosive pace.

1 undated in the register.

Dialling a Roberval number

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

The numbering neighbourhood

Roberval shares area codes 581, 418 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, Saint-Henri-de-Levis, has just 16.

What a Roberval number tells you

A number attached to Roberval 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 8 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 Roberval: code 581-674 is recorded for Videotron Ltd., so every 581-674-XXXX number (10,000 possible) descends from that assignment. “Roberval, Quebec” there names a rate centre, not a municipality, and several area codes overlay it.

Every Roberval prefix

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

Allocated prefixes

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

Elsewhere in Quebec