San Juan, PR Area Codes

Area codes serving San Juan

San Juan sits in Puerto Rico, part of the U.S. Territories region and the Atlantic Time zone. Its numbers are spread across an overlay of 2 codes that all cover the same ground: 787, 939.

The original code is 787 (in service since 1996). As the area ran low on numbers, regulators added overlay codes on top instead of splitting the city, so longtime residents kept their numbers while new lines received a newer code.

Code	Area served	In service
787	The entire Commonwealth of Puerto Rico	March 1, 1996
939	The entire Commonwealth of Puerto Rico	September 15, 2001

Nearby cities sharing these area codes

• Bayamón
• Carolina
• Ponce
• Caguas
• Guaynabo
• Arecibo
• Toa Baja
• Mayagüez
• Trujillo Alto
• Aguadilla
• Humacao
• Fajardo

How to pick an area code for a new number

When you activate a new line in San Juan, the carrier assigns whichever code has numbers available — you usually can't choose. If a specific code matters to you (for example the prestige of 787), ask the carrier whether any blocks remain, or request a number transfer. All codes here dial identically and cost the same.

Dialing in San Juan

Because San Juan is an overlay area, 10-digit dialing is mandatory: always dial the area code plus the seven-digit number, even for a neighbor. See 10-digit dialing and overlay area codes for the background. For every code in Puerto Rico, visit the Puerto Rico area codes page.