939 Area Code
Covers San Juan and nearby communities in Puerto Rico.
(939) 555-0142Area code 939 map
Interactive coverage map for area code 939, centered on San Juan, Puerto Rico
18.4655, -66.1057
Open in OpenStreetMapArea code 939 coverage map — centered on San Juan. Shaded area shows the approximate reach around the primary city.
939 is the area code for San Juan and the surrounding part of Puerto Rico. It covers communities such as San Juan and more across Puerto Rico. The region observes local time, so a number like (939) 555-0142 is on that clock right now. On the ground it spans San Juan. It shares its territory with the overlay code 787, which sit on the exact same map. Because the 939 region uses more than one area code, you must dial all ten digits — area code included — even for a local call. You do not, however, need to dial a leading 1 for calls within the US and Canada. On this page you'll find a live local clock for San Juan, an interactive coverage map, the cities and counties 939 serves, its overlay and neighboring codes, and tips on spotting 939 spam calls.
Cities covered by 939
Cities & neighborhoods
- San Juan
Nearby & overlay area codes
Overlay codes (same area)
These share 939’s geography — a number in either code can be on the same street.
Is a call from 939 a scam?
Area code 939 serves San Juan and the surrounding area, so most calls are ordinary local and business traffic. As everywhere, spam and robocalls do use 939 numbers, frequently by spoofing a local-looking caller ID to boost pickup rates. The area code itself tells you nothing about who is really calling, so judge the call by what's said, not the number.
Red flags to watch for
- Pressure to act right now, or threats of arrest, fines, or service being cut off.
- Requests to pay with gift cards, wire transfer, crypto, or a payment app.
- Asking for passwords, one-time codes, your SSN, or full card/bank numbers.
- A robocall or recording, or a number that won’t let you call back.
When unsure, hang up and call the organization back on a number you look up yourself.
Calling a 939 number from abroad
Every 939 number is a US/Canada +1 number. From a mobile anywhere, the simplest approach is to dial it in international format:
+1 939 555-0142If your phone can’t dial the +, replace it with your country’s exit code, then 1, then the number:
- UK, Germany, France & most of Europe
00 1 939 555-0142 - Australia
0011 1 939 555-0142 - Japan
010 1 939 555-0142 - Mexico
00 1 939 555-0142
Within the US and Canada you don’t need any of this — just dial the ten digits 939 555-0142.
Reverse phone lookup
Check any US or Canada number to see whether it's a working line, which carrier it sits on, whether it's mobile, landline or VoIP, and roughly where it's registered.
Shows carrier, line type and location. Owner name isn't available here.
Results are for personal, informational use only and may not be used for employment, credit, housing or tenant-screening decisions.
Area code 939: frequently asked questions
Where is the 939 area code located?
The 939 area code is located in Puerto Rico, centered on San Juan. It covers San Juan and nearby communities including San Juan.
What time zone is 939 in?
Area code 939 is in the local time zone (UTC-4 (AST)). You can see the exact current local time for San Juan on the live clock above.
What cities use area code 939?
Cities and areas that use 939 include San Juan. Its primary city is San Juan, PR.
Do I need to dial 1 before 939?
For calls within the US, you do not need to dial a leading 1, but you do need all ten digits: 939 plus the seven-digit number. The 939 area requires ten-digit dialing because more than one area code serves it.
Is 939 a toll-free or scam number?
No — 939 is a normal geographic area code for San Juan, not a toll-free code (toll-free codes are 800, 833, 844, 855, 866, 877 and 888). A 939 number is not inherently a scam, but the code can be spoofed. See the spam-call section above for how to tell.
What are the overlay area codes for 939?
Area code 939 is overlaid by 787, meaning those codes cover the same geographic area.