San Lorenzo, PR — rate center

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

Phone numbers "from San Lorenzo" are, precisely speaking, numbers whose prefixes are anchored to the San Lorenzo rate center of Puerto Rico, under 787, 939.

NANPA records show 4 active prefixes here across 3 carriers. 3 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.

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

Multiple area codes over one rate center (787/939) is the overlay pattern: same geography, different first three digits.

With only 4 prefixes, San Lorenzo sits at the small end of Puerto Rico's rate centers — a handful of carrier blocks cover the whole locality, and a number from here is a fairly strong locality signal (before porting is considered).

As always with US numbering: a prefix anchored to San Lorenzo tells you where the block was issued. The person calling may have ported the number, moved away, or be spoofing it entirely — verify callers through independently found contact details.

Prefixes anchored to San Lorenzo

FAQ

What area code is San Lorenzo, PR?

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

How many prefixes does San Lorenzo have?

4 active NXX prefixes are anchored to this rate center in NANPA records, held by 3 carriers.

Is a call from a San Lorenzo prefix really from San Lorenzo?

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