Phone prefixes in Rock Island, QC

In numbers

In-service prefixes

5

Telephone numbers covered

50,000

Carriers

4

Area codes

3

Provinces and territories

1

First assignment

December 19, 2007

Most recent assignment

August 25, 2025

Rock Island’s share of its area codes

Within area code 819, Rock Island accounts for only 3 of 770 prefixes (0.4%): the code is dominated by Ottawa-Hull and spread over 211 rate centres. Within area code 468, Rock Island accounts for only 1 of 67 prefixes (1.5%): the code is dominated by Ottawa-Hull and spread over 57 rate centres. Within area code 873, Rock Island accounts for only 1 of 667 prefixes (0.1%): the code is dominated by Sherbrooke and spread over 162 rate centres.

Who holds these numbers

Videotron Ltd. holds the largest share at 2 prefixes, 40.0% of the total, ahead of 3 other carriers. Code by code: in 819, Videotron Ltd. leads with 2 of 3 prefixes ahead of 1 others; Cogeco Connexion Inc. is the only holder in 468; TELUS Quebec is the only holder in 873. No carrier holds prefixes in every one of Rock Island’s 3 area codes, while 4 appear in just one.

Wireless and wireline

None of Rock Island’s holders carries a mobility brand in its registered name: all 5 prefixes belong to wireline or wholesale carriers, among them Videotron Ltd, Bell Canada, Cogeco Connexion Inc and TELUS Quebec. A call showing a Rock Island number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Rock Island’s dated assignments run from 2007 to 2025. The busiest period was 2005–2009, when 2 prefixes went to 1 carrier. 1 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 2 prefixes have been added, so the rate centre is still growing.

Rock Island’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 Videotron Ltd. in 2007. The most recent arrivals are Cogeco Connexion Inc. (2025), TELUS Quebec (2022) and Videotron Ltd. (2007), a sign that new carriers are still asking for numbers in Rock Island.

Rock Island has just 5 prefixes (50,000 numbers): a very small rate centre, typical of a village or rural area served by a single switching office.

Videotron Ltd. leads with 40.0% of the prefixes, but 3 competitors have set up in Rock Island: a market where the incumbent keeps the edge without exclusivity.

Growth is recent: 50.0% of the dated prefixes were assigned in the last ten years, peaking in 2005–2009. Rock Island is among the rate centres where demand for numbers is still rising quickly.

1 undated in the register.

Dialling a Rock Island number

Rock Island is served by 3 overlaid area codes (819, 468 and 873). A 873 number is no more “out of town” than a 819 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Rock Island shares area codes 819, 468 and 873 with at least 20 other rate centres, including Ottawa-Hull, Sherbrooke, Trois-Rivieres, Drummondville, Victoriaville, Gatineau, Val-D'Or and Maniwaki. The largest of them, Ottawa-Hull, holds 122 prefixes in 468, 819 and 873; the smallest on the list, Ville-Marie, has just 12.

What a Rock Island number tells you

A number attached to Rock Island 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 4 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 Rock Island: code 819-267 is recorded for Videotron Ltd., so every 819-267-XXXX number (10,000 possible) descends from that assignment. “Rock Island, Quebec” there names a rate centre, not a municipality, and several area codes overlay it.

Every Rock Island prefix

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

Allocated prefixes

All 5 in-service prefixes, grouped by rate centre.

Elsewhere in Quebec