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CNA numbering data

Canadian Prefix Lookup

Check a Canadian area code and the next three digits against 28,571 in-service code assignments.

Canadian telephone prefix lookup

Check a Canadian area code and prefix against CNA assignments. The exchange area and company describe the original code assignment, not where a caller is now.

The public area-code file loads when you search. Your search stays in your browser.

What does the result mean?

A prefix is an NPA-NXX code assignment. The exchange area is a telephone industry label, and the listed company is the assignee in the source report. A result cannot identify the owner, current carrier, active line status, or caller location.

Source: Canadian Numbering Administrator CO Code Status, report dated 2026-09-28. Looking for a US prefix?