St. Thomas area codes
St. Thomas, Ontario is served by 3 area codes: 548, 226 and 519. They overlay the same geography, so local calls take all ten digits regardless of which code a number uses. 548 carries the most numbers – 7 of the 16 number blocks assigned in the exchange, about 44%. The newest of them, 548, went into service in 2016. VoIP providers hold the largest share of blocks here (31%), which is unusual and typical of exchanges where numbers are issued for business or virtual lines.
Area codes serving St. Thomas
Blocks are allocations recorded by the Canadian Numbering Administrator for this exchange area, not a count of people with those numbers.
Who holds St. Thomas numbers
- VoIP providers31%
- Bell25%
- Fibernetics13%
“VoIP providers” and “Other” group carriers whose names our mapping does not resolve individually – they are buckets, not companies.
Questions about St. Thomas numbers
What area code is St. Thomas?
St. Thomas has 3: 548, 226, 519. All of them cover the same area, so a number can carry any of them.
Do I need to dial 10 digits in St. Thomas?
Yes. Where two or more codes overlay the same area, every local call needs the full ten digits.
Which carrier has most St. Thomas numbers?
VoIP providers holds about 31% of the number blocks assigned here. This is share of blocks allocated by the Canadian Numbering Administrator, not share of customers – people keep their numbers when they switch carriers.
Is 548 a new area code?
It went into service in 2016 as an overlay, meaning it was added to supply new numbers in the same area rather than replacing the existing codes.
Is a call from a St. Thomas number safe?
The area code tells you nothing about that. Spam callers routinely fake the number they display, often choosing a local-looking one because it gets answered more often. Look up the full number instead.
Other places in Ontario
Source
Canadian Numbering Administrator, CO Code Status, data date 31 October 2026. The CNA publishes one file per area code each weeknight; we aggregate by exchange area and province.
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