Area code 939: where it is and who calls from it
Area code 939 is in Puerto Rico.
| Where | Puerto Rico |
|---|---|
| Time zone | Atlantic Time ยท local time |
| In service since | 2001 |
| Overlay | Yes, with 787 |
| Prefixes assigned | 358 of 792 possible (45%) |
Overlay: 939 covers the same area as 787. Overlay areas use 10-digit dialing, so a seven-digit number alone won't connect, and neighbors can have different area codes.
Where 939 numbers started
Every prefix is assigned to a rate center, the local calling area it was set up in. These are the biggest in 939, with how many prefixes each has.
Plus 15 smaller rate centers.
Who holds 939 numbers
- Mobile carrier 53%
- Local phone company 25%
- Internet / business phone carrier 10%
- Phone company 12%
| Carrier | Type | Prefixes | Share |
|---|---|---|---|
| T-Mobile (including Sprint) | Mobile carrier | 120 | 34% |
| Claro Puerto Rico | Local phone company | 87 | 24% |
| Liberty Mobile Puerto Rico | Mobile carrier | 62 | 17% |
| Liberty Communications Of Puerto Rico | Phone company | 27 | 8% |
| Neutral Tandem | Internet / business phone carrier | 14 | 4% |
| Natural G.c | Phone company | 14 | 4% |
| Onvoy | Internet / business phone carrier | 14 | 4% |
| MetroPCS (T-Mobile) | Mobile carrier | 7 | 2% |
| Lumen Technologies Puerto Rico | Internet / business phone carrier | 5 | 1% |
| AT&T Mobility | Mobile carrier | 2 | <1% |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number.
States served: Puerto Rico.
Other area codes in Puerto Rico
Got a call from 939?
An area code tells you where a number was first assigned, not where the caller is. People keep their numbers when they move, and scammers can fake any number. If you weren't expecting the call, let it go to voicemail.
If the call shows a 939 number that matches the first six digits of your own, that's often neighbor spoofing. Use the box above to check the full number.
Area code facts from the NANPA area code database (updated 10/06/2026); prefixes and carriers from NANPA's central office code records (updated 2026-10-10). Place description adapted from Wikipedia, CC BY-SA 4.0.