🇺🇸 858 area code
Area code 858 covers San Diego, La Jolla, Poway and Rancho Santa Fe and the surrounding area in California. It shares that territory with 619, so the same neighbourhood can have numbers in any of them. Enter an 858 number below for a free check before you call back.
- Location: San Diego, California
- Time zone: Pacific (UTC−8)
- In service since June 12, 1999
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Area code 858 at a glance
Cities in area code 858
- San Diego
- La Jolla
- Poway
- Rancho Santa Fe
Is a 858 call a scam?
An area code tells you where a number was first assigned, not where the caller is. Mobile numbers keep their area code when people move, and internet (VoIP) numbers can be picked in any area code — so an 858 number can be calling from anywhere.
Robocallers exploit that with "neighbor spoofing": showing an 858 number to people in California because a local-looking call is more likely to be answered. If an 858 call claims to be your bank, the IRS or a delivery company, hang up and call the official number yourself.
About area code 858
858 entered service on June 12, 1999, as an overlay on 619, which had run short of numbers.
It is part of the 619/858 overlay: the codes cover the same area, and a new line there can be given a number in any of them. Two neighbours — or two phones in one household — can have different area codes. That is also why local calls need the full ten digits.
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Area code 858 questions
Sources: NANPA NPA database (11/04/2026) and Google libphonenumber. Area codes show where a number was assigned, not where its owner is today.
Where is area code 858?
Area code 858 is in California, United States. It covers San Diego, La Jolla, Poway and Rancho Santa Fe.
What time zone is area code 858?
858 is in the Pacific (UTC−8) time zone, and observes daylight saving time.
What area codes overlay 858?
619 serves the same area as 858. Numbers in all of them are local to one another.
When did area code 858 start?
858 entered service on June 12, 1999, created from 619.
How do I find out who called me from 858?
Enter the full number in the lookup at the top of this page. The free check confirms whether the number is valid and shows its carrier, line type and region; a full report adds owner and public-web records where they are available.
Why am I getting calls from area code 858?
If you live in or near California, they may be genuinely local — or robocalls spoofing a local-looking number. Unknown 858 callers who will not leave a message are best looked up before you call back.