STATE DIRECTORY

Ontario

15 area codes cover this state

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All Area Codes

Ontario ON

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Dialing Rules

How to dial in this state

This state requires mandatory 10-digit dialing (area code + 7-digit number) for all local and long-distance calls.

Due to overlay area codes, multiple codes may serve the same region, making 10-digit dialing mandatory.

FAQ

Common questions about area codes in this state

How many area codes does Ontario have?

Ontario currently has 15 active area codes covering all major cities and regions statewide.

How to get a premium number in Ontario?

Search your preferred Ontario area code on GreatNumber to browse all available premium numbers under that code.

Does Ontario require 10-digit dialing?

Yes, most areas in Ontario now require 10-digit dialing (area code + 7-digit number), including local calls.

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