Rio Piedras, PR — rate center

NANPA rate center & CO code data, current as of July 28, 2026.

In NANP numbering, Rio Piedras, Puerto Rico is a rate center — the anchor point for local numbers. It is reached through 787, 939 (multiple area codes serve it).

The rate center currently carries 75 working prefixes, held by 9 different carriers. Pooling applies to 16 of them — individual thousands-blocks may belong to different companies.

The rate center belongs to the San Juan-Bayamón-Caguas, PR Metropolitan Statistical Area. Routing-wise it sits in LATA 820.

Because 787, 939 all serve this territory, two Rio Piedras numbers can look completely different while being neighbors — check the prefix, not just the area code.

A Rio Piedras prefix on caller ID is a starting point, not proof of origin — numbers travel with their owners and displays can be spoofed. Use official callback numbers for anything sensitive.

Prefixes anchored to Rio Piedras

FAQ

What area code is Rio Piedras, PR?

Rio Piedras is served by 2 area codes — 787, 939 — which overlay the same territory.

How many prefixes does Rio Piedras have?

75 active NXX prefixes are anchored to this rate center in NANPA records, held by 9 carriers.

Is a call from a Rio Piedras prefix really from Rio Piedras?

Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.