Here’s what to know: When will new area code take effect in Northern California? Starting Friday, Jan 31, customers in the 530 area code region “may be assigned a number in the new 837 area ...

Use your ZIP code to see what time you'll be able to view the April 8 solar eclipse in Northern California.

Northern Californians get the new 837 area code in 2025. Here's where, why, who gets it, and why this is different from the 916 shift, the state said.