Phone prefixes in Mount Forest, ON

In numbers

In-service prefixes

20

Telephone numbers covered

200,000

Carriers

10

Area codes

4

Provinces and territories

1

First assignment

December 22, 1999

Most recent assignment

April 28, 2025

Mount Forest’s share of its area codes

Within area code 548, Mount Forest accounts for only 9 of 499 prefixes (1.8%): the code is dominated by London and spread over 170 rate centres. Within area code 519, Mount Forest accounts for only 7 of 779 prefixes (0.9%): the code is dominated by London and spread over 210 rate centres. Within area code 226, Mount Forest accounts for only 3 of 778 prefixes (0.4%): the code is dominated by London and spread over 166 rate centres. Within area code 382, Mount Forest accounts for only 1 of 60 prefixes (1.7%): the code is dominated by Kitchener-Waterloo and spread over 38 rate centres.

Who holds these numbers

Rogers Communications Canada Inc. (Wireless) holds the largest share at 8 prefixes, 40.0% of the total, ahead of 9 other carriers. Code by code: in 548, Rogers Communications Canada Inc. (Wireless) leads with 7 of 9 prefixes ahead of 2 others; in 519, Bell Canada leads with 2 of 7 prefixes ahead of 4 others; in 226, Bragg Communications Inc. leads with 1 of 3 prefixes ahead of 2 others; Fibernetics Corporation is the only holder in 382. No carrier holds prefixes in every one of Mount Forest’s 4 area codes, while 8 appear in just one.

Wireless and wireline

12 of Mount Forest’s 20 prefixes (60.0%) are held by carriers whose registered name marks a wireless business: Rogers Communications Canada Inc. (Wireless), TELUS Mobility, Bell Mobility and Fido Solutions Inc. That makes this a mostly mobile rate centre, which is typical of recent allocations: new prefixes go overwhelmingly to cellphones. 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

Mount Forest’s dated assignments run from 1999 to 2025. The busiest period was 2020–2024, when 9 prefixes went to 3 carriers. 1 prefixes (5%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 10 prefixes have been added, so the rate centre is still growing.

Mount Forest’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 Bell Canada in 1999. The most recent arrivals are Videotron Ltd. (2023), Fibernetics Corporation (2021) and TELUS Integrated Communications (2015), a sign that new carriers are still asking for numbers in Mount Forest.

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

Rogers Communications Canada Inc. (Wireless) leads with 40.0% of the prefixes, but 9 competitors have set up in Mount Forest: a market where the incumbent keeps the edge without exclusivity.

Growth is recent: 52.6% of the dated prefixes were assigned in the last ten years, peaking in 2020–2024. Mount Forest is among the rate centres where demand for numbers is still rising quickly.

1 undated in the register.

Dialling a Mount Forest number

Mount Forest is served by 4 overlaid area codes (548, 519, 226 and 382). A 382 number is no more “out of town” than a 548 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Mount Forest shares area codes 548, 519, 226 and 382 with at least 20 other rate centres, including London, Kitchener-Waterloo, Windsor, Guelph, Brantford, Chatham, Sarnia and Hespeler. The largest of them, London, holds 217 prefixes in 226, 382, 519 and 548; the smallest on the list, St. Thomas, has just 15.

What a Mount Forest number tells you

A number attached to Mount Forest tells you that its prefix was issued to a carrier for this rate centre in Ontario, most often Rogers Communications Canada Inc. (Wireless). It does not tell you where the handset is today: most of Mount Forest’s prefixes are mobile, and a cellphone keeps its number when its owner moves across the country. Nor does it tell you who is calling: caller ID can be spoofed, and an Ontario area code is easy to borrow to look local.

Reading a register entry for Mount Forest: code 548-335 is recorded for Rogers Communications Canada Inc. (Wireless), so every 548-335-XXXX number (10,000 possible) descends from that assignment. “Mount Forest, Ontario” there names a rate centre, not a municipality, and several area codes overlay it.

Every Mount Forest prefix

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

Allocated prefixes

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

Elsewhere in Ontario