939 area code — Bayamon Norte, PR geographic

Data: NANPA public reports, current as of July 28, 2026.

Phone numbers beginning 939 are registered to the Bayamon Norte area of Puerto Rico (Atlantic time zone). The code entered service on September 15, 2001. It is part of the 787/939 overlay complex — these codes share the same territory. Note that porting and VoIP mean a 939 number can be used from anywhere — the code marks where the number was assigned.

358 central-office prefixes are currently active in this code, spread across 15 code-holding carriers. Thousands-block pooling applies to 348 prefixes, so a single prefix can belong to several carriers. Its prefixes map to 75 distinct rate centers.

Use this page to decode where 939 numbers come from — and remember that spoofing means the screen can lie about everything except your own caution.

939 was created from 787 in 2001.

NANPA projects numbering capacity for the 787/939 complex to exhaust in 2Q 2054.

Dialing: 10D locally, 10D to other codes.

Largest localities in 939

FAQ

Will 939 run out of numbers?

NANPA's current forecast projects exhaust in 2Q 2054 — decades of capacity remain.

Why am I getting spam calls from 939 numbers?

Scammers spoof recognizable area codes so calls look local or familiar. A displayed 939 number does not prove the call originated there — see our guide to spotting spoofed calls.

Where is a 939 number from?

939 is assigned to Bayamon Norte and surrounding areas of Puerto Rico in the Atlantic time zone. The three digits after the area code (the prefix) narrow it down to a rate center.