Phone prefixes in Portneuf, QC

In numbers

In-service prefixes

4

Telephone numbers covered

40,000

Carriers

3

Area codes

2

Provinces and territories

1

First assignment

September 7, 2007

Most recent assignment

February 8, 2021

Portneuf’s share of its area codes

Within area code 418, Portneuf accounts for only 2 of 777 prefixes (0.3%): the code is dominated by Quebec and spread over 258 rate centres. Within area code 581, Portneuf accounts for only 2 of 778 prefixes (0.3%): the code is dominated by Quebec and spread over 232 rate centres.

Who holds these numbers

TELUS Quebec holds the largest share at 2 prefixes, 50.0% of the total, ahead of 2 other carriers. Code by code: in 418, TELUS Quebec leads with 1 of 2 prefixes ahead of 1 others; in 581, TELUS Quebec leads with 1 of 2 prefixes ahead of 1 others. 1 carrier holds prefixes in every one of Portneuf’s 2 area codes, while 2 appear in just one.

Wireless and wireline

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

How the allocation was built up

Portneuf’s dated assignments run from 2007 to 2021. The busiest period was 2005–2009, when 1 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. Since 2020 another 1 prefixes have been added, so the rate centre is still growing.

Portneuf’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 Videotron Ltd. in 2007. The most recent arrivals are TELUS Quebec (2021), Bell Canada (2018) and Videotron Ltd. (2007), a sign that new carriers are still asking for numbers in Portneuf.

Portneuf 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.

TELUS Quebec leads with 50.0% of the prefixes, but 2 competitors have set up in Portneuf: a market where the incumbent keeps the edge without exclusivity.

Demand remains steady: 33.3% 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 Portneuf number

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

The numbering neighbourhood

Portneuf shares area codes 418 and 581 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 Portneuf number tells you

A number attached to Portneuf 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 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 Portneuf: code 418-286 is recorded for TELUS Quebec, so every 418-286-XXXX number (10,000 possible) descends from that assignment. “Portneuf, Quebec” there names a rate centre, not a municipality, and several area codes overlay it.

Every Portneuf prefix

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

Allocated prefixes

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

Elsewhere in Quebec