Phone prefixes in Thamesford, ON

In numbers

In-service prefixes

5

Telephone numbers covered

50,000

Carriers

5

Area codes

2

Provinces and territories

1

First assignment

June 21, 2005

Most recent assignment

October 6, 2022

Thamesford’s share of its area codes

Within area code 519, Thamesford accounts for only 3 of 779 prefixes (0.4%): the code is dominated by London and spread over 210 rate centres. Within area code 548, Thamesford 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 1 prefixes, 20.0% of the total, ahead of 4 other carriers. Code by code: in 519, Bell Canada leads with 1 of 3 prefixes ahead of 2 others; in 548, Fibernetics Corporation leads with 1 of 2 prefixes ahead of 1 others. No carrier holds prefixes in every one of Thamesford’s 2 area codes, while 5 appear in just one.

Wireless and wireline

None of Thamesford’s holders carries a mobility brand in its registered name: all 5 prefixes belong to wireline or wholesale carriers, among them Bell Canada, Execulink Telecom Inc, Fibernetics Corporation and Quadro Communications Co-operative Inc. A call showing a Thamesford number therefore nominally comes from a landline, cable or VoIP platform rather than a locally assigned cellphone.

How the allocation was built up

Thamesford’s dated assignments run from 2005 to 2022. The busiest period was 2005–2009, when 2 prefixes went to 2 carriers. 1 prefixes (20%) 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.

Thamesford’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 Rogers Communications Canada Inc. (Cable) in 2005. The most recent arrivals are Fibernetics Corporation (2022), Quadro Communications Co-operative Inc. (2021) and Execulink Telecom Inc. (2008), a sign that new carriers are still asking for numbers in Thamesford.

Thamesford has just 5 prefixes (50,000 numbers): a very small rate centre, typical of a village or rural area served by a single switching office.

No single carrier dominates Thamesford: the leader, Bell Canada, holds only 20.0% of the prefixes against 4 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: 50.0% of the dated prefixes were assigned in the last ten years, peaking in 2005–2009. Thamesford is among the rate centres where demand for numbers is still rising quickly.

1 undated in the register.

Dialling a Thamesford number

Thamesford is served by 2 overlaid area codes (519 and 548). A 548 number is no more “out of town” than a 519 one; from abroad, dial +1 and the full ten digits.

The numbering neighbourhood

Thamesford shares area codes 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 142 prefixes in 519 and 548; the smallest on the list, St. Thomas, has just 10.

What a Thamesford number tells you

A number attached to Thamesford 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 5 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 Thamesford: code 519-285 is recorded for Bell Canada, so every 519-285-XXXX number (10,000 possible) descends from that assignment. “Thamesford, Ontario” there names a rate centre, not a municipality, and several area codes overlay it.

Every Thamesford prefix

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

Allocated prefixes

All 5 in-service prefixes, grouped by rate centre.

Elsewhere in Ontario