Phone prefixes in Caledon East, ON

In numbers

In-service prefixes

17

Telephone numbers covered

170,000

Carriers

15

Area codes

4

Provinces and territories

1

First assignment

April 6, 2000

Most recent assignment

March 21, 2022

Caledon East’s share of its area codes

Within area code 905, Caledon East accounts for only 6 of 773 prefixes (0.8%): the code is dominated by Hamilton and spread over 94 rate centres. Within area code 365, Caledon East accounts for only 5 of 702 prefixes (0.7%): the code is dominated by Markham and spread over 88 rate centres. Within area code 289, Caledon East accounts for only 4 of 772 prefixes (0.5%): the code is dominated by Hamilton and spread over 87 rate centres. Within area code 742, Caledon East 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

TELUS Mobility holds the largest share at 3 prefixes, 17.6% of the total, ahead of 14 other carriers. Code by code: in 905, TELUS Mobility leads with 3 of 6 prefixes ahead of 3 others; in 365, Distributel leads with 1 of 5 prefixes ahead of 4 others; in 289, Comwave Networks leads with 1 of 4 prefixes ahead of 3 others; in 742, Beanfield Technologies Inc. leads with 1 of 2 prefixes ahead of 1 others. No carrier holds prefixes in every one of Caledon East’s 4 area codes, while 15 appear in just one.

Wireless and wireline

4 of Caledon East’s 17 prefixes (23.5%) are held by carriers whose registered name marks a wireless business: TELUS Mobility and Fido Solutions Inc. Wireline prefixes still outnumber them, carried by Beanfield Technologies Inc, Bell Canada, Comwave Networks and Distributel. 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

Caledon East’s dated assignments run from 2000 to 2022. The busiest period was 2015–2019, when 5 prefixes went to 5 carriers. 3 prefixes (18%) 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.

Caledon East’s oldest prefixes, the ones the register leaves undated, belong to Bell Canada, Fido Solutions Inc and TELUS Mobility: these carriers made up the landscape before competition arrived. The first dated assignment went to TELUS Mobility in 2000. The most recent arrivals are FGLTEL Inc. (2022), Beanfield Technologies Inc. (2021) and TekSavvy Solutions Inc (2020), a sign that new carriers are still asking for numbers in Caledon East.

Caledon East has only 17 prefixes, or 170,000 numbers: a small rate centre, where the arrival of a single new carrier visibly changes the landscape.

No single carrier dominates Caledon East: the leader, TELUS Mobility, holds only 17.6% 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: 28.6% of the dated prefixes go back to the last ten years, the most active period being 2015–2019. The rate centre is growing at a regular rather than explosive pace.

3 undated in the register.

Dialling a Caledon East number

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

The numbering neighbourhood

Caledon East shares area codes 905, 365, 289 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 Caledon East number tells you

A number attached to Caledon East tells you that its prefix was issued to a carrier for this rate centre in Ontario, most often TELUS Mobility. 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 Caledon East: code 905-586 is recorded for TELUS Mobility, so every 905-586-XXXX number (10,000 possible) descends from that assignment. “Caledon East, Ontario” there names a rate centre, not a municipality, and several area codes overlay it.

Every Caledon East prefix

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

Allocated prefixes

All 17 in-service prefixes, grouped by rate centre.

Elsewhere in Ontario