Area codes in Allentown, Pennsylvania
Allentown, Pennsylvania uses 3 area codes — 610, 484 and 835. The main Allentown area code is 610.
Area codes serving Allentown
Phone numbers in Allentown are written as ten digits — for example (610) 555-0190 — and fall in the Eastern Time zone.
How Allentown came to have 3 area codes
The original Allentown area code is 610, in service since 1994. As the area ran low on available numbers, overlay codes were added over the same region for new phone lines: 484 (1999) and 835 (2022). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Allentown now uses all 3 codes and every local call is dialed with ten digits.
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Nearby cities
- Easton area codes
- West Chester area codes
- Trenton area codes
- Wilkes-Barre area codes
- Camden area codes
- Philadelphia area codes
- Cherry Hill area codes
- Lebanon area codes
More cities in Pennsylvania
- Pittsburgh area codes
- Harrisburg area codes
- Erie area codes
- Scranton area codes
- York area codes
- Altoona area codes
- Johnstown area codes
Frequently asked questions
What is the area code for Allentown?
The main area code for Allentown, Pennsylvania is 610. Allentown is now served by 3 area codes in total: 610, 484, 835.
How many area codes does Allentown have?
Allentown has 3 area codes: 610, 484, 835.
Why does Allentown have more than one area code?
As Allentown used up the numbers available in its original area code (610, in service since 1994), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Allentown number?
Dial all 10 digits — the area code (610 or 484 or 835) 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.