Phone prefixes in Grand Valley, ON

In numbers

In-service prefixes

4

Telephone numbers covered

40,000

Carriers

4

Area codes

3

Provinces and territories

1

First assignment

August 2, 2017

Most recent assignment

July 29, 2021

Grand Valley’s share of its area codes

Within area code 548, Grand Valley accounts for only 2 of 502 prefixes (0.4%): the code is dominated by London and spread over 170 rate centres. Within area code 226, Grand Valley accounts for only 1 of 778 prefixes (0.1%): the code is dominated by London and spread over 166 rate centres. Within area code 519, Grand Valley accounts for only 1 of 779 prefixes (0.1%): the code is dominated by London and spread over 210 rate centres.

Who holds these numbers

Bell Canada holds the largest share at 1 prefixes, 25.0% of the total, ahead of 3 other carriers. Code by code: in 548, Fibernetics Corporation leads with 1 of 2 prefixes ahead of 1 others; TELUS Integrated Communications is the only holder in 226; Bell Canada is the only holder in 519. No carrier holds prefixes in every one of Grand Valley’s 3 area codes, while 4 appear in just one.

Wireless and wireline

None of Grand Valley’s holders carries a mobility brand in its registered name: all 4 prefixes belong to wireline or wholesale carriers, among them Bell Canada, Fibernetics Corporation, Rogers Communications Canada Inc. (Cable) and TELUS Integrated Communications. A call showing a Grand Valley number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Grand Valley’s dated assignments run from 2017 to 2021. The busiest period was 2020–2024, when 2 prefixes went to 2 carriers. 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 2 prefixes have been added, so the rate centre is still growing.

Grand Valley’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 Integrated Communications in 2017. The most recent arrivals are Fibernetics Corporation (2021), Rogers Communications Canada Inc. (Cable) (2021) and TELUS Integrated Communications (2017), a sign that new carriers are still asking for numbers in Grand Valley.

Grand Valley 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.

No single carrier dominates Grand Valley: the leader, Bell Canada, holds only 25.0% of the prefixes against 3 competitors, a sign of a highly fragmented market where cable companies, mobility brands and VoIP providers weigh as much as the incumbent.

Growth is recent: 66.7% of the dated prefixes were assigned in the last ten years, peaking in 2020–2024. Grand Valley is among the rate centres where demand for numbers is still rising quickly.

1 undated in the register.

Dialling a Grand Valley number

Grand Valley is served by 3 overlaid area codes (548, 226 and 519). A 519 number is no more “out of town” than a 548 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Grand Valley shares area codes 548, 226 and 519 with at least 20 other rate centres, including London, Kitchener-Waterloo, Windsor, Guelph, Brantford, Sarnia, Chatham and Hespeler. The largest of them, London, holds 215 prefixes in 226, 519 and 548; the smallest on the list, Essex, has just 16.

What a Grand Valley number tells you

A number attached to Grand Valley tells you that its prefix was issued to a carrier for this rate centre in Ontario, most often Bell Canada. 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 an Ontario area code is easy to borrow to look local.

Reading a register entry for Grand Valley: code 519-928 is recorded for Bell Canada, so every 519-928-XXXX number (10,000 possible) descends from that assignment. “Grand Valley, Ontario” there names a rate centre, not a municipality, and several area codes overlay it.

Every Grand Valley prefix

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

Had a call from a Grand Valley number?

No clear pattern in reports on these numbers yet. If a call worried you:

1. Call back on a number you trust

   If a caller says they are your bank, the Canada Revenue Agency, a courier or your phone company, hang up and call the organization on the number from its website or your statement, never the number that called you. Caller ID can be faked.

2. Report the fraud

   Report the call or text to the Canadian Anti-Fraud Centre online or at 1-888-495-8501. If you lost money or gave out personal details, tell your bank first, then your local police.

   Report to the Canadian Anti-Fraud Centre ↗

3. Register on the National Do Not Call List

   Registering a landline or mobile on the National DNCL is free. Registered charities, political parties, newspapers and companies you already do business with may still call.

   National Do Not Call List ↗Who can still call you ↗

4. Forward suspicious texts to 7726

   Forward a scam or spam text to 7726 (SPAM on the keypad). It's free, and your carrier uses it to block the sender. Don't tap links or reply.

   Get Cyber Safe: forwarding to 7726 ↗

Allocated prefixes

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

Elsewhere in Ontario