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US area code · Puerto Rico

Area code 939

Where the 939 area code is, its overlay and how to dial a +1 939 number from anywhere.

CoversPuerto RicoTime zoneAlaska (AKT)TypeOverlay
Quick answer

The 939 area code is in Puerto Rico, United States (Alaska (AKT)). To call from abroad: +1 939 555-0123. It is an overlay, so all 10 digits are dialled.

StatePuerto Rico
Time zoneAlaska (AKT)
TypeOverlay
10-digit dialingRequired
In service since31-May-2000

The 939 area code is a geographic North American Numbering Plan (NANP) code covering Puerto Rico. It has been in service since 31-May-2000 and sits in the Alaska (AKT) time zone.

Overlay 939 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

939787

How to dial a 939 number

From abroad+1 939 555-0123
Within the US / Canada1 939 555-0123
Locally (same area)939 555-0123

Other Puerto Rico area codes

787

Frequently asked questions

Where is the 939 area code?

The 939 area code is in Puerto Rico, United States (Alaska (AKT)).

Is 939 an overlay area code?

Yes. 939 overlays the same region as 787, so callers dial all 10 digits.

Do I have to dial 10 digits for 939?

Yes — dial the area code plus the seven-digit number.

How do I call a 939 number from another country?

Dial your exit code (or +), then 1, then 939, then the number: +1 939 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 939 number does not pinpoint a street or ZIP code.

Missed a call from +1 939?

In the 30 days to September 24, 2026, 16 unwanted calls showing a 939 number were reported to the US Federal Trade Commission, 50% of them recorded messages or robocalls. That puts 939 at #399 of 670 area codes reported.

Other7
Work from home & other ways to make money2
Calls pretending to be government, businesses, or family and friends2
Reducing your debt (credit cards, mortgage, student loans)2
Before you call back
  • If you do not know anyone in Puerto Rico, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 939 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 939 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 939:

Suncom Dba T-Mobile USA 121Puerto Rico Telco Dba Claro Puerto Rico 87Liberty Mobile Puerto Rico Inc. 62Liberty Communications Of Puerto Rico LLC 27Natural G.C. Inc. 14Onvoy Spectrum, LLC 14

About 32.9% of the 374 prefixes in use belong to mobile carriers: a 939 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

All US area codes United States +1 Map of area code 939 — cities & rate centres