Area Code 939
PR
Area code 939 serves PR, primarily San Juan, in the Atlantic Time (AT) time zone. It is an overlay area code sharing territory with area code 787.
Overlay Area Code
This area code is part of an overlay region, meaning the same geographic area is served by multiple area codes. Overlay codes were introduced to meet growing demand for phone numbers without requiring existing customers to change their numbers.
This area code shares its geographic region with: area code 787 (San Juan).
In service since: 01-Jan-2001
Demographics & Economics
- Total Population
- 7,255,163
- Population Density
- 912 people/sq miabove U.S. average (U.S.: 94 people/sq mi)
- Median Household Income
- $24,307below U.S. median (U.S.: $78,538)
- Poverty Rate
- 41.2%above U.S. average (U.S.: 12.4%)
- Unemployment Rate
- 11.4%above U.S. average (U.S.: 5.2%)
- Education Attainment
- Bachelor's Degree+28.5%below U.S. average (U.S.: 35.0%)High School or Lower40.7%
Statistics are population-weighted aggregations from Census ACS 5-year estimates.See Sources for details.
Time Zone
- Atlantic Time (AT)
NANPA Relief Status
According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.
Current Time
Prefix Utilization
Geographic Coverage
State
PR
Major Cities
- San Juan
- Bayamon
- Carolina
- Ponce
- Caguas
Demographics
The estimated population served by area code 939 is approximately 7,255,163. The population density is 912 people per square mile, which is higher than the national average of 94. The median household income is $24,307, which is lower than the national median of $78,538. Approximately 28.5% of adults hold a bachelor's degree or higher, compared to the national rate of 35.0%. This rate is lower than the national average. The poverty rate stands at 41.2%, which is higher than the national rate of 12.4%.
History
Area code 939 serves as an overlay for the same territory as area code 787. It was introduced in 2001 to provide additional phone number capacity for the region. It shares its territory with area code area code 787.
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 939).
| County | Population | Share |
|---|---|---|
| San Juan Municipio, PR | 532,785 | 7.3% |
| Toa Alta Municipio, PR | 351,003 | 4.8% |
| Guaynabo Municipio, PR | 329,463 | 4.5% |
| Trujillo Alto Municipio, PR | 285,899 | 3.9% |
| Carolina Municipio, PR | 256,947 | 3.5% |
| Bayamón Municipio, PR | 245,461 | 3.4% |
| San Lorenzo Municipio, PR | 190,702 | 2.6% |
| Toa Baja Municipio, PR | 188,485 | 2.6% |
| Aguas Buenas Municipio, PR | 167,938 | 2.3% |
| Ponce Municipio, PR | 158,864 | 2.2% |
| Moca Municipio, PR | 150,889 | 2.1% |
| Gurabo Municipio, PR | 138,940 | 1.9% |
| Canóvanas Municipio, PR | 131,973 | 1.8% |
| Corozal Municipio, PR | 130,473 | 1.8% |
| Añasco Municipio, PR | 129,725 | 1.8% |
| Caguas Municipio, PR | 129,658 | 1.8% |
| Vega Baja Municipio, PR | 127,855 | 1.8% |
| Manatí Municipio, PR | 125,880 | 1.7% |
| Vega Alta Municipio, PR | 124,541 | 1.7% |
| San Germán Municipio, PR | 119,319 | 1.6% |
| Las Piedras Municipio, PR | 118,320 | 1.6% |
| Humacao Municipio, PR | 115,263 | 1.6% |
| Aguada Municipio, PR | 115,191 | 1.6% |
| Cataño Municipio, PR | 114,818 | 1.6% |
| Coamo Municipio, PR | 107,852 | 1.5% |
| Isabela Municipio, PR | 105,876 | 1.5% |
| Cidra Municipio, PR | 104,765 | 1.4% |
| Arecibo Municipio, PR | 101,232 | 1.4% |
| Cayey Municipio, PR | 100,529 | 1.4% |
| Hatillo Municipio, PR | 99,665 | 1.4% |
| Barceloneta Municipio, PR | 98,618 | 1.4% |
| Utuado Municipio, PR | 98,012 | 1.4% |
| San Sebastián Municipio, PR | 92,705 | 1.3% |
| Aguadilla Municipio, PR | 91,428 | 1.3% |
| Mayagüez Municipio, PR | 81,309 | 1.1% |
| Barranquitas Municipio, PR | 81,113 | 1.1% |
| Yabucoa Municipio, PR | 76,365 | 1.1% |
| Comerío Municipio, PR | 72,771 | 1.0% |
| Loíza Municipio, PR | 64,614 | 0.9% |
| Ceiba Municipio, PR | 64,130 | 0.9% |
| Las Marías Municipio, PR | 61,500 | 0.8% |
| Orocovis Municipio, PR | 60,213 | 0.8% |
| Juana Díaz Municipio, PR | 58,827 | 0.8% |
| Quebradillas Municipio, PR | 57,601 | 0.8% |
| Yauco Municipio, PR | 56,195 | 0.8% |
| Santa Isabel Municipio, PR | 53,927 | 0.7% |
| Adjuntas Municipio, PR | 52,261 | 0.7% |
| Patillas Municipio, PR | 51,240 | 0.7% |
| Guayanilla Municipio, PR | 50,760 | 0.7% |
| Lajas Municipio, PR | 50,611 | 0.7% |
| Río Grande Municipio, PR | 47,077 | 0.6% |
| Cabo Rojo Municipio, PR | 46,955 | 0.6% |
| Hormigueros Municipio, PR | 45,378 | 0.6% |
| Guayama Municipio, PR | 41,838 | 0.6% |
| Juncos Municipio, PR | 37,243 | 0.5% |
| Sabana Grande Municipio, PR | 36,984 | 0.5% |
| Florida Municipio, PR | 36,156 | 0.5% |
| Dorado Municipio, PR | 36,099 | 0.5% |
| Naguabo Municipio, PR | 34,333 | 0.5% |
| Camuy Municipio, PR | 32,753 | 0.5% |
| Fajardo Municipio, PR | 31,756 | 0.4% |
| Arroyo Municipio, PR | 31,408 | 0.4% |
| Ciales Municipio, PR | 30,867 | 0.4% |
| Naranjito Municipio, PR | 29,732 | 0.4% |
| Lares Municipio, PR | 28,891 | 0.4% |
| Morovis Municipio, PR | 28,534 | 0.4% |
| Maunabo Municipio, PR | 26,235 | 0.4% |
| Salinas Municipio, PR | 26,029 | 0.4% |
| Aibonito Municipio, PR | 24,610 | 0.3% |
| Villalba Municipio, PR | 21,829 | 0.3% |
| Peñuelas Municipio, PR | 21,374 | 0.3% |
| Luquillo Municipio, PR | 17,631 | 0.2% |
| Rincón Municipio, PR | 15,432 | 0.2% |
| Jayuya Municipio, PR | 14,816 | 0.2% |
| Maricao Municipio, PR | 13,988 | 0.2% |
| Guánica Municipio, PR | 13,276 | 0.2% |
| Vieques Municipio, PR | 8,147 | 0.1% |
| Culebra Municipio, PR | 1,281 | 0.0% |
About Calls From This Area Code
Calls from this area code originate from PR. This information is provided for geographic context only. We do not provide spam or scam verdicts for individual phone numbers.
Nearby Area Codes
Area codes geographically closest to 939.
Other Area Codes in PR
Area codes that also serve PR, linked for easy comparison.
Frequently Asked Questions
Common questions about area code 939 and how phone numbering works.
Phone numbers with area code 939 are tied to their original provisioning location serving approximately 7.3 million people — they cover San Juan in PR, and a number retains its 939 prefix even if the owner moves or switches to VoIP. Established in 2001, this code has been in continuous use since then. Mobile phones keep their original number when users relocate, and businesses often adopt local area codes to establish a regional presence.
Start by looking up the area code on this site to understand its geographic context — area code 939 is associated with San Juan in PR. Most numbers with this code originate from the San Juan area. For step-by-step guidance on identifying and reporting unknown numbers, see our unknown number safety guide.
When a region's available phone numbers run low, regulators introduce an "overlay" — a new code covering the same territory as an existing one. Both codes coexist, and new numbers are assigned from whichever has availability. It was introduced in 2001 to serve the growing San Juan region in PR, where demand for new phone numbers outpaced available supply. The combined service area has approximately 7.3 million residents. This area code shares its region with area code 787. Learn more in our overlay vs split guide.