Puerto Rico · Atlantic Time
787 Area Code
Area code 787 is in Puerto Rico, serving the entire Commonwealth of Puerto Rico. It is in the Atlantic Time zone. It shares its territory with overlay code 939, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 787 area code?
787 is a Puerto Rico area code covering the entire Commonwealth of Puerto Rico. In the wider directory it sits in the U.S. Territories region.
Cities in the 787 area code
- San Juan
- Bayamón
- Carolina
- Ponce
- Caguas
- Guaynabo
- Arecibo
- Toa Baja
- Mayagüez
- Trujillo Alto
- Aguadilla
- Humacao
- Fajardo
787 overlay codes and dialing
The 787 territory is covered by an overlay of 2 area codes: 787, 939. All of them serve the same geographic area, and the original code is 787. Because more than one code covers the same ground, 10-digit dialing is mandatory — you must dial the area code for every local call. New phone lines may be assigned any of these codes.
History of the 787 area code
787 went into service on March 1, 1996. It serves San Juan and the surrounding part of Puerto Rico, and today shares its territory with overlay code 939. For how codes are created, split, and overlaid, see how area codes work.
Is 787 a scam or spam risk?
787 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 787 number on your screen is no guarantee the caller is in San Juan, PR or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Explore more
See every code in Puerto Rico, compare codes across the U.S. Territories region, or view all Atlantic Time codes. You can also browse the 7XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
787 area code FAQ
Where is the 787 area code?
The 787 area code is in Puerto Rico, covering the entire Commonwealth of Puerto Rico, in the U.S. Territories region.
What cities are in the 787 area code?
Cities in the 787 area code include San Juan, Bayamón, Carolina, Ponce, Caguas, Guaynabo, Arecibo, Toa Baja, Mayagüez and Trujillo Alto.
What time zone is 787 in?
787 is in the Atlantic Time zone.
What is the overlay for the 787 area code?
787 shares its territory with 939. Both codes (787, 939) serve the same area, so 10-digit dialing is required for every call.
When did the 787 area code start?
787 went into service on March 1, 1996.
Do I have to dial 10 digits for 787?
Yes. Because 787 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 787 a toll-free or premium code?
No. 787 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.