These are the primary telephone area codes for Markham and the Greater Toronto Area (GTA) suburbs in southern Ontario.
How to Call Markham from Overseas
- Dial your country's exit code (International Access Code)
- Dial 1 (Canada country code)
- Dial the area code (905, 289, or 365)
- Dial the 7-digit local phone number
Example: Calling Markham from the UK
00 1 905 555 1234
Where:
00 = UK exit code
1 = Canada country code
905 = Markham area code
555 1234 = Local Markham phone number
Quick Facts
Markham Area Code Coverage
These area codes serve Markham and key surrounding regions:
905 - Original GTA Suburbs
Markham, Brampton, Mississauga, Richmond Hill, Vaughan
289 - First Overlay (2001)
Added to relieve number exhaustion in the 905 region
365 - Second Overlay (2013)
Further expansion for high-growth areas like Markham
Unionville & Downtown Markham
Historic Main Street, Markham Museum, municipal offices
North Markham
Thornhill, Cornell, Wismer Commons
East Markham
Milnesville, Cedar Grove, rural and developing zones
Major Canadian Area Codes
Common Exit Codes for Calling Canada
When calling Markham from these countries, use these exit codes:
United Kingdom
00
Australia
0011
European Union
00
Japan
010
China
00
United States
011