San Bernardino, CA Area Codes

Area codes serving San Bernardino

San Bernardino sits in California, part of the West region and the Pacific Time zone. Its numbers are spread across an overlay of 2 codes that all cover the same ground: 840, 909.

The original code is 909 (in service since 1992). 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
840	Western San Bernardino County and the Pomona Valley of eastern Los Angeles County	February 23, 2021
909	Western San Bernardino County and the Pomona Valley of eastern Los Angeles County	November 14, 1992

Nearby cities sharing these area codes

• Fontana
• Ontario
• Rancho Cucamonga
• Pomona
• Chino
• Upland
• Rialto
• Redlands
• Chino Hills
• Colton
• Highland
• Diamond Bar
• Yucaipa

How to pick an area code for a new number

When you activate a new line in San Bernardino, 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 909), ask the carrier whether any blocks remain, or request a number transfer. All codes here dial identically and cost the same.

Dialing in San Bernardino

Because San Bernardino 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 California, visit the California area codes page.