Area codes in Pittsburgh, Pennsylvania
Pittsburgh, Pennsylvania uses 2 area codes — 412 and 878. The main Pittsburgh area code is 412.
Area codes serving Pittsburgh
Phone numbers in Pittsburgh are written as ten digits — for example (412) 555-0190 — and fall in the Eastern Time zone.
How Pittsburgh came to have 2 area codes
The original Pittsburgh area code is 412, in service since 1947. As the area ran low on available numbers, an overlay code was added over the same region for new phone lines: 878 (2001). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Pittsburgh now uses all 2 codes and every local call is dialed with ten digits.
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Nearby cities
- Johnstown area codes
- Youngstown area codes
- Morgantown area codes
- Altoona area codes
- Kent area codes
- Akron area codes
- Hudson area codes
- Brunswick area codes
More cities in Pennsylvania
- Philadelphia area codes
- Allentown area codes
- Harrisburg area codes
- Erie area codes
- Scranton area codes
- York area codes
- Lebanon area codes
- Easton area codes
Frequently asked questions
What is the area code for Pittsburgh?
The main area code for Pittsburgh, Pennsylvania is 412. Pittsburgh is now served by 2 area codes in total: 412, 878.
How many area codes does Pittsburgh have?
Pittsburgh has 2 area codes: 412, 878.
Why does Pittsburgh have more than one area code?
As Pittsburgh used up the numbers available in its original area code (412, in service since 1947), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Pittsburgh number?
Dial all 10 digits — the area code (412 or 878) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.