Cities in area code 939

75 localities · NANPA data, current as of July 28, 2026.

Which places use area code 939? 75 rate centers in Puerto Rico, the biggest being Bayamon Norte, Santurce, Carolina. Data below is NANPA's official prefix-to-rate-center mapping.

Ranked by active prefixes, the code's territory runs through Bayamon Norte, Santurce, Carolina, Ponce, Bayamon Sur, Aguadilla, Caguas and Trujillo Alto, and 66 smaller communities down to single-prefix localities.

47 of the localities fall within FCC top-100 metropolitan statistical areas; the rest are smaller communities.

Territory status changes nothing about the numbering: these Puerto Rico communities are standard NANP rate centers, dialed domestically from anywhere in the US.

75 of these localities are also reachable through other area codes — overlay territory where the same place answers to several codes.

All of the code's territory keeps Atlantic time.

Remember that people keep numbers when they relocate, so a 939 number is a where-it-was-issued fact, not a where-they-are fact.

FAQ

What is the biggest city in area code 939?

Bayamon Norte holds the most active prefixes (103), making it the code's largest numbering locality.

How many places does 939 cover?

75 rate centers in Puerto Rico hold active 939 prefixes, from Bayamon Norte down to communities with a single prefix.

Does a 939 number guarantee the caller lives in one of these places?

No — the tables show where number blocks were issued. Porting and VoIP let people keep or acquire numbers anywhere.