North American Numbers Source-cited · ownership disclosed
Area code
939
In service
United States · since 2001

Puerto Rico (overlay)

Area code 939 is an overlay of area code 787, covering the same Puerto Rico territory. It was added in 2001 to relieve 787 number exhaustion.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Puerto Rico (overlay)
Type
geographic
Status
in service
In service since
2001
Projected exhaust
2054 Q2

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 939 is

The entire Commonwealth of Puerto Rico (same geography as 787)..

Communities served wholly or partly by 939:

San JuanBayamónCarolinaPonceCaguasMayagüez
B · Relationships

How it relates to other codes

The codes 939 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Overlay · 2001 787 Puerto Rico 939 was added as an overlay on top of 787.
What's changing. Active overlay of 787.
C · History

How 939 got here

2001-09-15
Introduced as an overlay on 787 after 787 neared exhaustion within four years.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
374
Prefixes available
426
Thousands-blocks assigned
2,897

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 939 with another code →
Sources
Wikipedia ↗
Area codes 787 and 939
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.