Area code
Area code 858 — San Diego, CA
California · in service since June 12, 1999
Area code 858 covers the San Diego, CA area. It is an overlay: 619 serves the same area, so neighbors can have different area codes.
Overlay, same area: 619
Local time in San Diego
Spam reports from Sep 23 – Oct 22, 2026
Average #163 of 461 codes
566 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zonePacific Time
- Local calls1 + 10 digits
- Prefixes578 assigned
- Runs out~3Q 2039
- Unwanted call?Block & report
Spam call reports about 858 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 28 |
| Sep 14 | 122 |
| Sep 21 | 117 |
| Sep 28 | 125 |
| Oct 5 | 127 |
| Oct 12 | 145 |
| Oct 19 (4 days) | 93 |
Compared with all codes
- Robocalls
- 60%all codes 75%
- Callers with the same code
- 34%all codes 35%
- Rank by complaints
- #163of 461 · middle half
- FCC complaints, Oct 2025 – Sep 2026
- 13610 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Reducing your debt (credit cards, mortgage, student loans) | 158 21% | |
| Calls pretending to be government, businesses, or family and friends | 75 10% | |
| Dropped call or no message | 70 9% | |
| Home improvement & cleaning | 22 3% | |
| Medical & prescriptions | 11 1% | |
| Computer & technical support | 6 1% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| California | 407 54% | |
| Texas | 30 4% | |
| Washington | 27 4% | |
| Maryland | 25 3% | |
| Illinois | 21 3% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 858 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| LA JOLLA | San Diego | San Diego County | 167 |
| SNDG LVTA | San Diego | San Diego County | 81 |
| SNDG MRMS | San Diego | San Diego County | 69 |
| DEL MAR | Del Mar | San Diego County | 45 |
| POWAY | Poway | San Diego County | 45 |
| RNCHOBRNDO | — | — | 41 |
| SNDG SNDG | San Diego | San Diego County | 23 |
| RNCHOPNQTS | — | — | 22 |
| CHULAVISTA | Chula Vista | San Diego County | 18 |
| EL CAJON | El Cajon | San Diego County | 14 |
Plus 9 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- California
- Assigned by NANPA
- June 30, 1998
- Local dialing
- 1 + 10 digits (NANPA: 1+10D)
- NANPA planning letters
- PL-507, PL-128
Source: NANPA, NPA database of Oct 24, 2026.
Is 858 running out of numbers?
Previous forecast (October 2025): 2037, moved later by 2 years.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 858 prefixes
The five largest of 41 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Pacific Bell | 152 26% | |
| New Cingular Wireless PCS, LLC | 50 9% | |
| T-Mobile USA, Inc. | 44 8% | |
| Fractel, LLC | 35 6% | |
| Onvoy, LLC | 34 6% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 858
What area code is 858?
A California area code, in service since June 12, 1999.
Where is 858 area code, and what time zone is it in?
San Diego, CA; Pacific Time.
Why am I getting spam calls from 858?
566 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).
Will 858 get a new area code?
NANPA forecasts exhaust in 3Q 2039; no relief planning listed.