Area code · CA
858 area code
The 858 area code serves San Diego, California. Look up a specific 858 number, check spam reports, and stop spam calls automatically.
schedule2 min readUpdated May 15, 2026By the Halo team
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Location
San Diego, CA
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Timezone
Pacific
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State
California
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Major cities
La Jolla, Del Mar, Poway
ABOUTAbout the 858 area code
The 858 area code is assigned to San Diego, California. Phone numbers with this area code are used by residents and businesses in the San Diego metropolitan area and surrounding communities.
If you've received an unwanted call from a 858 area code number, use the Halo phone lookup tool to check if it has been reported as spam. Halo AI blocks 99% of spam calls at the network level, protecting you from robocalls, scams, and telemarketers before they ever reach your phone.
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