Area Code 858
Area code 858 covers San Diego and nearby cities including Poway in California, in the Pacific Time.
Area code 858 quick facts
| Location | San Diego, California |
|---|---|
| Time zone | Pacific Time |
| In service | 1999-06-12 |
| Overlay codes | 619 |
| Nearby codes | 619, 442, 760, 949, 951, 657 |
| Carrier coverage | 558 prefixes; 33% wireless |
| FTC complaint data | 275 complaints across 70 numbers |
| Data current as of | August 2, 2026 |
Is a call from 858 a scam? Who called me from 858?
FTC complaints involving 858 numbers
Numbers shown with area code 858 in the FTC's Do Not Call “Reported Calls” database (recent reporting window). Most common reported reasons: “Other”, “Calls pretending to be government, businesses, or family and friends”, “Reducing your debt (credit cards, mortgage, student loans)”.
Most-complained 858 numbers:
- (858) 766-5984 — 10 complaints
- (858) 335-5520 — 10 complaints
- (858) 203-1319 — 9 complaints
- (858) 252-6010 — 8 complaints
- (858) 394-0910 — 8 complaints
These are FTC Do Not Call complaints filed about specific numbers shown with this area code — frequently spoofed. The area code itself is not a scam. See the most-reported area codes and the most-reported phone numbers nationwide.
Cities in area code 858
San Diego, Poway
Area codes by city
Carriers in area code 858
Area code 858 spans 558 prefixes, about 33% wireless. Top carriers: ONVOY, LLC - CA, PACIFIC BELL, T-MOBILE USA, INC., NEW CINGULAR WIRELESS PCS, LLC. Look up the carrier and line type for a 858 number.
Other California area codes
- 209 — Stockton
- 213 — Los Angeles
- 279 — Sacramento
- 310 — Compton
- 323 — Los Angeles
- 341 — Oakland
- 350 — Stockton
- 357 — Fresno
- 369 — Santa Rosa
- 408 — San Jose
- 415 — San Francisco
- 424 — Compton
- 442 — Victorville
- 510 — Oakland
- 530 — Marysville
- 559 — Fresno
- 562 — Long Beach
- 619 — San Diego
- 626 — Alhambra
- 628 — San Francisco
- 650 — Palo Alto
- 657 — Anaheim
- 661 — Bakersfield
- 669 — San Jose
- 707 — Santa Rosa
- 714 — Anaheim
- 738 — Los Angeles
- 747 — San Fernando
- 760 — Oceanside
- 805 — Oxnard
- 818 — Van Nuys
- 820 — Camarillo
- 831 — Salinas
- 837 — Redding
- 840 — Pomona
- 909 — Ontario
- 916 — Sacramento
- 925 — Concord
- 949 — Irvine
- 951 — Riverside
Nearby area codes
Frequently asked questions
Where is area code 858?
Area code 858 covers San Diego and nearby cities including Poway in California, in the Pacific Time.
What cities use area code 858?
Area code 858 serves San Diego, Poway in California.
What time zone is area code 858 in?
Area code 858 is in the Pacific Time (America/Los_Angeles).
How do you dial a 858 number?
Dial all 10 digits: 858 followed by the 7-digit local number. From abroad, dial +1 858 and the local number.
Is a call from area code 858 a scam?
A 858 number is geographically tied to California, but caller ID can be spoofed, so the displayed area code does not prove where a caller really is. If you did not expect the call, do not share personal information and consider looking the number up.
Is 858 a country code?
No. 858 is a US area code (a domestic 3-digit code), not a country code. The country (calling) code for the United States is +1, shared across the North American Numbering Plan. So a full 858 number written for international dialing looks like +1 858 followed by the 7-digit local number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.