Area code 787: Puerto Rico
Area code 787 is a US territory area code for Puerto Rico, on Atlantic Standard Time. It has 777 prefixes in service across 84 rate centers, the largest being Santurce, Rio Piedras and Trujillo Alto. It shares its area with 939, so local numbers there can start with any of them. Local calls there take 10 digits.
Local time in area code 787
America/Puerto_Rico
Prefixes in service
777 of 792 possible
84 rate centers
Area code 787 facts
| Location | Puerto Rico, United States |
|---|---|
| Time zone | Atlantic Standard Time |
| Overlays | 939 |
| Split from | 809 |
| In service since | March 1, 1996 |
| Local calls | 10 digits; toll calls 1 + 10 digits |
| Carrier | Not shown. An area code is where a number was issued; numbers port between carriers. Check line type |
Which cities and towns use area code 787?
NANPA records each prefix against a rate center, the local billing area a number belongs to, usually named after its main town. These are the 787 rate centers with the most prefixes in service. 72 smaller ones aren't listed.
| Rate center | Prefixes |
|---|---|
| Santurce | 180 |
| Rio Piedras | 69 |
| Trujillo Alto | 61 |
| Guaynabo | 50 |
| Bayamon Norte | 32 |
| Caguas | 28 |
| Ponce | 24 |
| Pueblo Viejo | 19 |
| Carolina | 18 |
| Arecibo | 16 |
| Mayaguez | 14 |
| Aguadilla | 12 |
Source: NANPA central office code assignments, file dated 10/17/2026. Each prefix holds up to 10,000 numbers.
How do I dial a 787 number?
NANPA's dialling plan for 787: local calls inside the code take 10 digits, toll calls 1 + 10 digits. From another area code, dial 1 first. From abroad, use +1. The examples use 555-0147, from a range reserved for fictional numbers.
| Local call inside 787 | 787-555-0147 |
|---|---|
| From another US or Canadian area code | 1-787-555-0147 |
| From outside North America | +1 787 555 0147 |
| E.164, for CRMs and SMS tools | +17875550147 |
When did area code 787 start?
Area code 787 went into service on March 1, 1996, split from 809. Today 787 and 939 cover the same area as an overlay, which is why 10-digit dialling is needed for local calls there.
Tools for 787 numbers
- Area code lookup
Look up any code or a whole list of numbers, or find the codes for a state or city.
- Area code time zone
Local time for a list of numbers, with a callable-now flag.
- NPA-NXX lookup
Rate center and state for one prefix, a level below the area code.
- TCPA calling hours checker
Whether it's inside the federal 8 a.m. to 9 p.m. calling window there now.
Next step
A 787 number tells you where it was issued, not what it is now.
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Area code 787 questions
- What state or territory is area code 787?
- Area code 787 is in Puerto Rico, United States. Its largest rate centers by number of prefixes are Santurce, Rio Piedras, Trujillo Alto, Guaynabo and Bayamon Norte.
- What time zone is area code 787 in?
- Atlantic Standard Time.
- What area codes overlay 787?
- 939. An overlay adds a new code to the same area instead of splitting it, so neighbours can have different area codes and local calls need 10 digits.
- When did area code 787 start?
- Area code 787 went into service on March 1, 1996, split from 809.
- Is a 787 number a cell phone or a landline?
- The area code can't tell you. In the US and Canada mobiles, landlines and VoIP lines share area codes and prefixes, and numbers move between carriers and line types. Only a live line-type lookup answers it for one number.
- How many phone numbers does area code 787 have?
- 777 of its 792 possible prefixes are in service, and each prefix holds up to 10,000 numbers. That counts prefixes assigned to carriers, not numbers in use.
Other area codes in Puerto Rico
Sources
Location, overlays, in-service date and dialling plan: NANPA NPA database, file dated 10/16/2026. Prefixes and rate centers: NANPA central office code assignments, 10/17/2026. Time zones mapped to the IANA time zone database. By the SimpleVerifier Team; how we build these pages.