Phone prefixes in Preston, ON

In numbers

In-service prefixes

14

Telephone numbers covered

140,000

Carriers

11

Area codes

3

Provinces and territories

1

First assignment

July 17, 2000

Most recent assignment

December 30, 2024

Preston’s share of its area codes

Within area code 226, Preston accounts for only 6 of 778 prefixes (0.8%): the code is dominated by London and spread over 166 rate centres. Within area code 519, Preston accounts for only 6 of 779 prefixes (0.8%): the code is dominated by London and spread over 210 rate centres. Within area code 548, Preston accounts for only 2 of 499 prefixes (0.4%): the code is dominated by London and spread over 170 rate centres.

Who holds these numbers

Bell Canada holds the largest share at 2 prefixes, 14.3% of the total, ahead of 10 other carriers. Code by code: in 226, Fibernetics Corporation leads with 1 of 6 prefixes ahead of 5 others; in 519, Bell Canada leads with 2 of 6 prefixes ahead of 3 others; in 548, Fibernetics Corporation leads with 1 of 2 prefixes ahead of 1 others. No carrier holds prefixes in every one of Preston’s 3 area codes, while 10 appear in just one.

Wireless and wireline

None of Preston’s holders carries a mobility brand in its registered name: all 14 prefixes belong to wireline or wholesale carriers, among them Bell Canada, Fibernetics Corporation, Zayo Canada Inc and Distributel. A call showing a Preston number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Preston’s dated assignments run from 2000 to 2024. The busiest period was 2005–2009, when 4 prefixes went to 4 carriers. 2 prefixes (14%) carry no date in the register: these are the historic pre-1999 assignments, the wireline bedrock of the rate centre. Since 2020 another 3 prefixes have been added, so the rate centre is still growing.

Preston’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 Zayo Canada Inc. in 2000. The most recent arrivals are IXICA Communications Inc. (2021), TekSavvy Solutions Inc (2021) and Distributel (2018), a sign that new carriers are still asking for numbers in Preston.

Preston has only 14 prefixes, or 140,000 numbers: a small rate centre, where the arrival of a single new carrier visibly changes the landscape.

No single carrier dominates Preston: the leader, Bell Canada, holds only 14.3% of the prefixes against 10 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: 25.0% 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.

2 undated in the register.

Dialling a Preston number

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

The numbering neighbourhood

Preston shares area codes 226, 519 and 548 with at least 20 other rate centres, including London, Kitchener-Waterloo, Windsor, Guelph, Brantford, Sarnia, Chatham and Hespeler. The largest of them, London, holds 214 prefixes in 226, 519 and 548; the smallest on the list, Essex, has just 16.

What a Preston number tells you

A number attached to Preston 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 11 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 Preston: code 519-650 is recorded for Bell Canada, so every 519-650-XXXX number (10,000 possible) descends from that assignment. “Preston, Ontario” there names a rate centre, not a municipality, and several area codes overlay it.

Every Preston prefix

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

Allocated prefixes

All 14 in-service prefixes, grouped by rate centre.

Elsewhere in Ontario