939 Area Code — Puerto Rico
939 is a North American Numbering Plan area code for Puerto Rico, the United States. It covers about 2,732,121 people in 90 towns and 131 ZIP codes, including Bayamon, Carolina and Caguas.
| Field | Value |
|---|---|
| Area code | 939 |
| Country | United States (+1) |
| State / province | Puerto Rico |
| Type | Shares its towns with 787 |
| Time zone | Atlantic |
| Population covered | 2,732,121 |
| Towns covered | 90 |
| ZIP codes | 131 |
| Approx. centre | 18.261, -66.385 |
Where area code 939 is used
Area code 939 is assigned to Puerto Rico, the United States, inside the North American Numbering Plan. Numbers in the code are written (939) NXX-XXXX at home and +1 939 NXX-XXXX when dialled from outside Canada and the United States. Since the NANP moved to 10-digit dialling you must always include the area code, even for a local call.
Other area codes in this footprint: 787. They serve towns in the same territory, so a single street can contain numbers from more than one code. That is normal in the NANP and does not change how you dial.
Towns and cities in area code 939
The 90 towns below are the largest in the 939 footprint, ranked by population. Every one of them links to its own page with the full list of area codes and ZIP codes for that town.
| Town | County | Population | ZIP codes |
|---|---|---|---|
| Bayamon | Bayamón Municipio | 185,101 | 6 |
| Carolina | Carolina Municipio | 146,542 | 9 |
| Caguas | Caguas Municipio | 128,653 | 3 |
| Ponce | Ponce Municipio | 119,859 | 8 |
| Guaynabo | Guaynabo Municipio | 94,870 | 6 |
| Mayaguez | Mayagüez Municipio | 71,666 | 3 |
| Toa Baja | Toa Baja Municipio | 66,256 | 3 |
| Toa Alta | Toa Alta Municipio | 66,156 | 2 |
| Arecibo | Arecibo Municipio | 62,908 | 3 |
| Trujillo Alto | Trujillo Alto Municipio | 60,620 | 2 |
| Vega Baja | Vega Baja Municipio | 55,512 | 2 |
| Aguadilla | Aguadilla Municipio | 48,448 | 3 |
Counties covered
| County | ZIP codes |
|---|---|
| Ponce Municipio | 10 |
| Carolina Municipio | 8 |
| Guaynabo Municipio | 7 |
| Arecibo Municipio | 6 |
| Bayamón Municipio | 6 |
| Aguadilla Municipio | 4 |
| Mayagüez Municipio | 3 |
| Caguas Municipio | 3 |
| Humacao Municipio | 3 |
| Toa Baja Municipio | 3 |
| Trujillo Alto Municipio | 3 |
| Adjuntas Municipio | 2 |
Other area codes serving the same towns
Nearby area codes
How to dial area code 939
- Within North America: 939 + 7-digit number (939-NXX-XXXX). The leading 1 is optional on a mobile phone and required on most landlines for long-distance.
- From abroad: your country's international prefix, then 1, then 939, then the 7-digit number — for example 00 1 939 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 939?
939 is a North American Numbering Plan area code assigned to Puerto Rico, the United States. It covers about 2,732,121 people in 90 towns.
Is 939 a US or Canadian area code?
939 is a United States area code. Canada and the United States share the +1 country code, so both are part of the same numbering plan.
What time zone is area code 939 in?
Area code 939 is in the Atlantic time zone.
Do I have to dial 10 digits?
Yes. Every NANP call now requires the area code plus the seven-digit number, even for a local call.