Prefix 787-421 — Guaynabo, PR
A phone number starting 787-421 was issued in the Guaynabo rate center of PR — part of area code 787.
The assigned code holder is LIBERTY MOBILE PUERTO RICO INC., operating company number 639J. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.
A scammer can display 787-421 without ever touching PR. When in doubt, end the call and reach the company or agency through its official website; unwanted robocalls belong in the FTC's fraud report queue.
Guaynabo 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.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 787-418 | Carolina | OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR |
| 787-419 | Santurce | OPTIVON TELECOMMUNICATIONS SERVICES, INC. - PR |
| 787-420 | Guaynabo | LIBERTY MOBILE PUERTO RICO INC. |
| 787-422 | Guaynabo | LIBERTY MOBILE PUERTO RICO INC. |
| 787-423 | Santurce | LIBERTY MOBILE PUERTO RICO INC. |
| 787-424 | Guaynabo | LIBERTY MOBILE PUERTO RICO INC. |
FAQ
Where is 787-421 located?
The prefix is assigned to the Guaynabo rate center in PR, area code 787. It is part of the San Juan-Bayamón-Caguas, PR Metropolitan Statistical Area.
Which company owns 787-421 numbers?
LIBERTY MOBILE PUERTO RICO INC. holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.
Is a call from 787-421 safe to answer?
The prefix itself says nothing about the caller. Legitimate Guaynabo businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.