Area Code Atlas

NPA 530 split from 916

Area code 530 was created on November 1, 1997, in a split from area code 916, covering the northeastern portion including Redding, Yreka, Davis, and Mount Shasta. Simultaneously, Dixon was reassigned from 916 to 707.

NPA Test Number Change for the New 530 Numbering Plan Area (NPA) in California

NPA 530 activated for personal communications services

Area code 530 was activated on August 1, 2016, in the United States for personal communications services and machine-to-machine communication, expanding the 5XX series.

Activation of area code 530 for non-geographic services

Area code 530 was activated on August 1, 2016 for non-geographic personal communications services.

Ten-digit dialing becomes mandatory in 530

Area code 530 transitioned to mandatory ten-digit dialing by October 24, 2021, due to the nationwide designation of 988 as the code for the National Suicide Prevention Lifeline. This change was necessary to resolve conflicts with existing seven-digit dialing in the area.

Overlay planned for area code 530 with new code 837

The California Public Utilities Commission assigned area code 837 as an overlay for area code 530 on June 8, 2023, to provide additional numbering resources. The overlay is scheduled to be effective on January 31, 2025, to ensure a continuing supply of telephone numbers as 530 approached exhaustion.

NPA 837 overlay on 530 announced

NPA 837 to Overlay NPA 530 (California)

Area code 837 overlay activated on 530

Area code 837 was activated as an overlay to area code 530 on January 31, 2025. As ten-digit dialing was already in effect, no permissive dialing period was necessary. The overlay allows new telephone numbers to be assigned in the same geographic area without requiring existing customers to change their numbers.