Prefix 787-320 — Santurce, PR

NANPA CO code assignment, current as of July 28, 2026.

Area code
787
Prefix (NXX)
320
Rate center
Santurce
State
Puerto Rico
Time zone
Atlantic
Code holder
PUERTO RICO TELCO DBA CLARO PUERTO RICO
OCN
4823
Pooled
No
Assigned
2001-03-16
LATA
820

The 787-320 prefix belongs to area code 787 and is anchored to the Santurce rate center (PR). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

Santurce is part of the San Juan-Bayamón-Caguas, PR Metropolitan Statistical Area. For routing purposes it sits in LATA 820. Numbers here keep Atlantic time.

Code-holder of record: PUERTO RICO TELCO DBA CLARO PUERTO RICO (OCN 4823), assigned March 16, 2001. The prefix is not pooled, so the full 10,000-number block sits with the code holder (subject to number portability).

Caller ID showing 787-320 is not proof the call came from Santurce: spoofing and porting both detach numbers from their origin. To verify a caller, hang up and dial the organization's published number, and report suspicious calls to the FTC.

Neighboring prefixes

Prefixes adjacent to 787-320
PrefixRate centerCode holder
787-317 Santurce PUERTO RICO TELCO DBA CLARO PUERTO RICO
787-318 Santurce PUERTO RICO TELCO DBA CLARO PUERTO RICO
787-319 Santurce PUERTO RICO TELCO DBA CLARO PUERTO RICO
787-321 Trujillo Alto PUERTO RICO TELCO DBA CLARO PUERTO RICO
787-322 Trujillo Alto PUERTO RICO TELCO DBA CLARO PUERTO RICO
787-323 Trujillo Alto PUERTO RICO TELCO DBA CLARO PUERTO RICO

FAQ

Where is 787-320 located?

The prefix is assigned to the Santurce rate center in PR, area code 787. It is part of the San Juan-Bayamón-Caguas, PR Metropolitan Statistical Area.

Which company owns 787-320 numbers?

PUERTO RICO TELCO DBA CLARO PUERTO RICO holds the code. Individual numbers may still be ported to other providers.

Is a call from 787-320 safe to answer?

The prefix itself says nothing about the caller. Legitimate Santurce businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.