The 787 area code covers San Juan, Guaynabo and 72 more places in Puerto Rico.
787 has been in service since 1996, on Atlantic Time. 939 covers the same area, so two neighbours can have different area codes.
- Where
- San Juan, Guaynabo and Trujillo Alto, Puerto Rico
- Time zone
- Atlantic Time
- In service since
- 1996
- Shares its area with
- 939 (since 2001)
- Prefixes in use
- 777
- How to dial
- Local calls need all 10 digits: 787-555-0142.
Find out who called you from a 787 number.
Enter the full 10-digit number to see who it is listed to, where it is registered, and whether it is a mobile, landline or VoIP line.
San Juan holds 33% of the phone prefixes in area code 787.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 777 prefixes in use shows where 787 numbers are actually given out.
- San Juan256 prefixes, 33%
- Guaynabo69 prefixes, 9%
- Trujillo Alto61 prefixes, 8%
- Bayamón39 prefixes, 5%
- Caguas28 prefixes, 4%
- Ponce24 prefixes, 3%
- Carolina21 prefixes, 3%
- Arecibo16 prefixes, 2%
Also served: Mayagüez, Aguadilla, Toa Baja and Fajardo and 62 smaller places.
787 has been overlaid once since 1996.
1996
787 starts, split off from 809.
2001
939 is added on top of 787, so new numbers here can get either code.
A 787 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
These are the questions people ask most about area code 787.
Where is area code 787?
787 covers San Juan, Guaynabo, Trujillo Alto and Bayamón and 70 more places in Puerto Rico.
What time zone is area code 787 in?
787 is on Atlantic Time.
Is 787 the same area as 939?
Yes. 939 (since 2001) covers the same ground as 787. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 787 number?
Local calls need all 10 digits: 787-555-0142.
Who called me from a 787 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 787 a scam?
787 is a real Puerto Rico area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.