Mayaguez, PR — rate center

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

Mayaguez is a telephone rate center in Puerto Rico served by area codes 787, 939. A rate center is the locality the phone industry uses to anchor numbers for billing; every prefix listed below is registered here.

19 central-office prefixes are currently anchored to this rate center, held by 5 different carriers. Pooling applies to 10 of them — individual thousands-blocks may belong to different companies.

Routing-wise it sits in LATA 820.

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

Treat this data as geography of the number, not of the caller: porting, VoIP and caller-ID spoofing all detach the two. When a call matters, hang up and call back through an official number.

Prefixes anchored to Mayaguez

FAQ

What area code is Mayaguez, PR?

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

How many prefixes does Mayaguez have?

19 active NXX prefixes are anchored to this rate center in NANPA records, held by 5 carriers.

Is a call from a Mayaguez prefix really from Mayaguez?

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