Area codes in Key West, Florida
Key West, Florida uses 3 area codes — 305, 786 and 645. The main Key West area code is 305.
Area codes serving Key West
Phone numbers in Key West are written as ten digits — for example (305) 555-0190 — and fall in the Eastern Time zone.
How Key West came to have 3 area codes
The original Key West area code is 305, in service since 1947. As the area ran low on available numbers, overlay codes were added over the same region for new phone lines: 786 (1998) and 645 (2023). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Key West now uses all 3 codes and every local call is dialed with ten digits.
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Nearby cities
- Homestead area codes
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More cities in Florida
- Orlando area codes
- Tampa area codes
- Jacksonville area codes
- Pensacola area codes
- Tallahassee area codes
- West Palm Beach area codes
- Gainesville area codes
- Boca Raton area codes
Frequently asked questions
What is the area code for Key West?
The main area code for Key West, Florida is 305. Key West is now served by 3 area codes in total: 305, 786, 645.
How many area codes does Key West have?
Key West has 3 area codes: 305, 786, 645.
Why does Key West have more than one area code?
As Key West used up the numbers available in its original area code (305, 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 Key West number?
Dial all 10 digits — the area code (305 or 786 or 645) 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.