Phone prefixes in Oak Ridges, ON

In numbers

In-service prefixes

21

Telephone numbers covered

210,000

Carriers

15

Area codes

4

Provinces and territories

1

First assignment

January 31, 2000

Most recent assignment

April 27, 2022

Oak Ridges’s share of its area codes

Within area code 289, Oak Ridges accounts for only 7 of 772 prefixes (0.9%): the code is dominated by Hamilton and spread over 87 rate centres. Within area code 905, Oak Ridges accounts for only 7 of 773 prefixes (0.9%): the code is dominated by Hamilton and spread over 94 rate centres. Within area code 365, Oak Ridges accounts for only 5 of 702 prefixes (0.7%): the code is dominated by Markham and spread over 88 rate centres. Within area code 742, Oak Ridges accounts for only 2 of 146 prefixes (1.4%): the code is dominated by Brampton and spread over 68 rate centres.

Who holds these numbers

Rogers Communications Canada Inc. (Cable) holds the largest share at 4 prefixes, 19.0% of the total, ahead of 14 other carriers. Code by code: in 289, Rogers Communications Canada Inc. (Cable) leads with 1 of 7 prefixes ahead of 6 others; in 905, Rogers Communications Canada Inc. (Cable) leads with 3 of 7 prefixes ahead of 2 others; in 365, Beanfield Technologies Inc. leads with 1 of 5 prefixes ahead of 4 others; in 742, Iristel Inc. leads with 1 of 2 prefixes ahead of 1 others. No carrier holds prefixes in every one of Oak Ridges’s 4 area codes, while 13 appear in just one.

Wireless and wireline

2 of Oak Ridges’s 21 prefixes (9.5%) are held by carriers whose registered name marks a wireless business: TELUS Mobility. Wireline prefixes still outnumber them, carried by Rogers Communications Canada Inc. (Cable), Bell Canada, Iristel Inc and Beanfield Technologies Inc. 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

Oak Ridges’s dated assignments run from 2000 to 2022. The busiest period was 2005–2009, when 6 prefixes went to 4 carriers. 4 prefixes (19%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 4 prefixes have been added, so the rate centre is still growing.

Oak Ridges’s oldest prefixes, the ones the register leaves undated, belong to Bell Canada and TELUS Mobility: these carriers made up the landscape before competition arrived. The first dated assignment went to Rogers Communications Canada Inc. (Cable) in 2000. The most recent arrivals are FGLTEL Inc. (2022), Beanfield Technologies Inc. (2021) and TekSavvy Solutions Inc (2021), a sign that new carriers are still asking for numbers in Oak Ridges.

Oak Ridges has only 21 prefixes, or 210,000 numbers: a small rate centre, where the arrival of a single new carrier visibly changes the landscape.

No single carrier dominates Oak Ridges: the leader, Rogers Communications Canada Inc. (Cable), holds only 19.0% of the prefixes against 14 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: 23.5% 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.

4 undated in the register.

Dialling a Oak Ridges number

Oak Ridges is served by 4 overlaid area codes (289, 905, 365 and 742). A 742 number is no more “out of town” than a 289 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Oak Ridges shares area codes 289, 905, 365 and 742 with at least 20 other rate centres, including Hamilton, Brampton, Oshawa, St. Catharines-Thorold, Oakville, Markham, Ajax-Pickering and Cooksville. The largest of them, Hamilton, holds 221 prefixes in 289, 365, 742 and 905; the smallest on the list, Dunnville, has just 28.

What a Oak Ridges number tells you

A number attached to Oak Ridges tells you that its prefix was issued to a carrier for this rate centre in Ontario, most often Rogers Communications Canada Inc. (Cable). It does not tell you where the handset is today: a subscriber may have ported the number to any of the 15 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 Oak Ridges: code 289-234 is recorded for Rogers Communications Canada Inc. (Cable), so every 289-234-XXXX number (10,000 possible) descends from that assignment. “Oak Ridges, Ontario” there names a rate centre, not a municipality, and several area codes overlay it.

Every Oak Ridges prefix

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

Had a call from a Oak Ridges 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 21 in-service prefixes, grouped by rate centre.

Elsewhere in Ontario