Caller ID for
Area code 939
Area code 939 Bayamón, Puerto Rico
Area code 939 is in Puerto Rico, with numbers assigned in Bayamón, San Juan, Carolina and 64 more places. It’s 12:14 AM there now.
- State
- Puerto Rico2 area codes in Puerto Rico
- Time zone
- Atlantic12:14 AM there now
- Exchanges
- 35867 places
- Overlay
- 787Same area, 10-digit dialing
- No sign-up
- We never contact the number
- Spam risk included
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Where area code 939 is
Numbers in 939 are assigned to 67 places in 65 counties: Bayamón Municipio, San Juan Municipio, Carolina Municipio, Ponce Municipio, Aguadilla Municipio, Caguas Municipio, plus 59 more.
Bayamón has the most, 29% of the exchanges; the rest are spread across 66 other places.
- Bayamón103
- San Juan48
- Carolina16
- Ponce15
- Aguadilla11
- Caguas9
- Trujillo Alto8
- Manatí7
- Cayey7
- Arecibo7
- Arroyo7
- San Germán6
- Naranjito6
- Fajardo5
- Mayagüez5
- Canóvanas3
- Toa Alta3
- Vega Alta3
- Isabela3
- Rincón3
- Adjuntas2
- Orocovis2
- Lajas2
- Humacao2
Phone companies in 939
358 blocks of numbers in 939 are held by 14 phone companies. The most belong to T-Mobile (127), Puerto Rico Telco (87) and Liberty Mobile Puerto Rico (62).
Mostly mobile: about 53% of blocks belong to wireless networks, 29% to local phone and cable companies and 18% to other carriers, such as internet phone services.
A block’s holder is the company it was first assigned to; numbers can move to other carriers since.
History and overlays
939 went into service in 2001, added to the area of 787.
787 (since 1996) shares the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.
95 new exchanges were assigned since 2021, the latest in October 2025.
Calling 939
It’s 12:14 AM Atlantic time in 939 right now.
From elsewhere in the U.S., dial 1, 939 and the 7-digit number; inside the area, all 10 digits too.
Nearby area codes
Puerto Rico has 2 area codes: 787 and 939.
- 305 · Miami, FL · about 1,029 mi
- 786 · Miami, FL · about 1,029 mi
- 645 · Miami, FL · about 1,029 mi
- 954 · Fort Lauderdale, FL · about 1,038 mi
- 754 · Fort Lauderdale, FL · about 1,038 mi
- 728 · West Palm Beach, FL · about 1,052 mi
From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.
Map of the 939 area code
Map of the 939 area code around Bayamón, San Juan and Carolina, Puerto Rico.
Cities on the map
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Questions about 939
Where is area code 939?
In Puerto Rico, covering Bayamón, San Juan and Carolina and other places across 65 counties.
What time zone is 939 in?
Atlantic time. It was 12:14 AM there when this page loaded.
Is 939 an overlay?
Yes. 787 serves the same area, so dial all 10 digits for local calls.
Which phone companies have 939 numbers?
14 companies hold blocks; the most belong to T-Mobile, Puerto Rico Telco and Liberty Mobile Puerto Rico. About 53% of blocks are wireless.
Is 939 running out of numbers?
Not on record. 95 new exchanges have been assigned since 2021.