858 Area Code: San Diego, California
Area code 858 serves San Diego, La Jolla and Poway, California in the Pacific time zone, in service since 1999. Consumers have filed 4,484 unwanted-call complaints against 3,222 different 858 numbers, 467 of them with the FTC in the last 30 days. Look up the exact number that called you below.
Area code 858 at a glance
- State
- California
- Main cities
- San Diego, La Jolla, Poway, Del Mar, Rancho Bernardo, Chula Vista + 9 more
- County
- San Diego County
- Local time
- —Pacific
- In service since
- June 12, 1999
- Overlay of
- 619
- Local dialing
- 10 digits (area code + number)
- Exchanges
- 19 rate centers, 563 prefixes
Sources: NANPA area code and central office code records (refreshed weekly); cities and counties matched from US Census Bureau and USGS place names.
Most-reported 858 numbers
Ranked by FTC Do Not Call complaints this month, then all-time FTC and FCC complaints. Only numbers with enough complaints for a full report page are listed. Click one for what it was reported for and where.
What calls from 858 numbers are about
1,503 FTC Do Not Call complaints about 858 numbers since Jul 24. The most common named subject is debt-relief pitches, at 23% of complaints (90% of those were recorded messages). Overall, 64% of callers who answered said the call was a robocall.
FTC complaint subjects
- Other / unspecified64943%
- Debt reduction34123%
- Impostor (government, business, family)16411%
- Dropped call / no message1329%
- No subject given1007%
- Home improvement & cleaning372%
- Medical & prescriptions282%
FCC complaints by call type, last 2 years
- Live Voice11344%
- Prerecorded Voice11243%
- Text Message3313%
13% of recent FCC complaints about 858 numbers are about text messages, not calls.
When 858 spam calls come in
30% of complaints that give a call time describe calls between 1pm and 4pm. 94% came Monday to Friday, most on Thursdays, the pattern of call-center robocall campaigns that run on business hours. Times are as consumers reported them to the FTC.
By hour of the day
By day of the week
Is it getting worse?
518 FTC complaints about 858 numbers in the last four weeks, up 2% on the four weeks before. FCC complaints about 858 numbers peaked in 2015 (551); the FTC's daily Do Not Call data has carried most of the volume since mid-2026.
FTC complaints per week
FCC complaints per year
Years shown as '15 to '26; the current year is partial.
Who gets these calls
51% of the FTC complaints about 858 numbers came from California residents, but only 27% from people with 858 numbers themselves. The calls are mostly regional rather than aimed at 858 phones specifically.
Where complainants live
- California76851%
- Texas624%
- Illinois604%
- Florida564%
- Virginia393%
What people with 858 numbers report
People whose own number starts with 858 filed 1,709 FTC complaints since Jul 24. 24% were about calls showing another 858 number. The most common named subject was debt-relief pitches.
Area codes on the calls they reported
- 858 (same code)41124%
- 6191287%
- 833 (toll-free)644%
- 877 (toll-free)624%
- 760543%
Likely campaigns using 858 numbers
Groups of numbers that drew the same FTC complaint in the same pattern over the last 60 days. The grouping is statistical and doesn't identify who is calling.
Busiest 858 prefixes this month
FTC complaints in the last 30 days, grouped by the first six digits. When one prefix collects complaints about many different numbers, a campaign is usually cycling through that block. The carrier is who NANPA assigned the prefix to, not who made the calls.
| Prefix | Complaints | Numbers | Carrier | Exchange |
|---|---|---|---|---|
| (858) 392-xxxxcampaign | 26 | 26 | Commio, LLC | San Diego |
| (858) 276-xxxxcampaign | 21 | 19 | AT&T Mobility (New Cingular Wireless PCS) | San Diego |
| (858) 443-xxxx | 19 | 19 | T-Mobile USA | Chula Vista |
| (858) 394-xxxx | 13 | 12 | Five9, INC. | San Diego |
| (858) 598-xxxx | 13 | 11 | Teleport Communications America, LLC | San Diego |
Carriers operating in 858
NANPA has assigned 563 858 prefixes (NPA-NXX central-office codes) across 19 rate centers: 23% to wireless carriers, 75% to landline and VoIP operators; 74% are pooled blocks shared by several carriers. 11 prefixes were assigned in the last 12 months (newest 2026-10-20). The carrier holding a prefix is who the number was issued through. It says nothing about who is calling, since caller ID is routinely spoofed.
| Carrier | Type | Prefixes | Rate centers | Newest assignment |
|---|---|---|---|---|
| Pacific Bell (AT&T) | Incumbent landline (ILEC) | 151(27%) | 8 | 2018-10-03 |
| AT&T Mobility (New Cingular Wireless PCS) | Wireless | 50(9%) | 13 | 2026-07-23 |
| T-Mobile USA | Wireless | 44(8%) | 10 | 2025-11-28 |
| Fractel, LLC | Competitive / VoIP (CLEC) | 35(6%) | 14 | 2022-05-10 |
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 34(6%) | 10 | 2026-09-14 |
| MCImetro (Verizon Business) | Competitive / VoIP (CLEC) | 32(6%) | 8 | — |
| Verizon Wireless (Cellco Partnership) | Wireless | 31(6%) | 7 | 2025-01-24 |
| Teleport Communications America, LLC | Competitive / VoIP (CLEC) | 26(5%) | 9 | 2023-11-16 |
| U.S. Telepacific CORP. dba Tpx Communications | Competitive / VoIP (CLEC) | 24(4%) | 9 | 2022-05-27 |
| Level 3 (Lumen) | Competitive / VoIP (CLEC) | 20(4%) | 8 | 2007-07-03 |
| Level 3 (Lumen) | Competitive / VoIP (CLEC) | 18(3%) | 8 | 2021-07-22 |
| Comcast (Xfinity Voice) | Competitive / VoIP (CLEC) | 15(3%) | 8 | 2026-10-20 |
Largest rate centers (exchanges) by prefixes: San Diego (172), La Jolla (167), Del Mar (45), Poway (45), Rancho Bernardo (41), Rancho Peñasquitos (22), Chula Vista (18), El Cajon (14). Source: NANPA Central Office Code Utilized Assignments (public, refreshed weekly).
What to do about calls from 858 numbers
Before you call back
- Debt reduction is the top named complaint here. Don't pay upfront fees for debt relief; the FTC's Telemarketing Sales Rule bans them. Talk to your lender or a nonprofit credit counselor instead. Read about debt-relief robocalls.
- Look up the full number above. A missed call from 858 with no voicemail is usually a robocall; anyone who needs you will leave a message.
- Block repeat callers: iPhone, Android, or your carrier's free filter (Verizon, AT&T, T-Mobile).
Report it in California
- Unwanted sales calls and robocalls: donotcall.gov (FTC). Scams and fraud: ReportFraud.ftc.gov.
- Spoofing, texts and call-blocking problems: FCC consumer complaints.
- State complaints: California Attorney General.
- California formally adopted the FTC's National Do Not Call Registry as its own state list rather than running a separate one, so a single free registration at donotcall.gov covers you. State authorities can still enforce against telemarketers who ignore it, in addition to any federal penalty.
Your FTC and FCC reports are published (without your name or number) in the datasets this page is built from. How to report unwanted calls.
Area code 858: questions answered from the data
Where is area code 858?
Area code 858 serves San Diego, La Jolla and Poway, California, covering San Diego County. It has been in service since June 12, 1999.
What time zone is area code 858 in?
Area code 858 is in the Pacific time zone (UTC−8, or UTC−7 during daylight saving time). The current local time is shown at the top of this page.
What are calls from 858 numbers usually about?
Since Jul 24, consumers filed 1,503 FTC Do Not Call complaints about 858 numbers. The most common named subject was debt-relief pitches: 23% of complaints, 90% of them recorded messages. Across all subjects, 64% of callers who answered the question said the call was a robocall.
When do 858 spam calls happen?
30% of the complaints that give a call time describe calls between 1pm and 4pm, and 94% came on weekdays, most often on Thursday. Times are as consumers reported them.
Are calls from 858 numbers really local?
Not necessarily. 51% of the FTC complaints about 858 numbers came from California residents, but only 27% from people with 858 numbers themselves. The calls are mostly regional rather than aimed at 858 phones specifically.
Are 858 robocalls increasing?
In the four weeks to Oct 15, consumers filed 518 FTC complaints about 858 numbers, 2% more than the four weeks before.
How do I report an 858 scam call in California?
Report unwanted sales calls and robocalls to the FTC at donotcall.gov, and scams to ReportFraud.ftc.gov. The FCC takes complaints at consumercomplaints.fcc.gov. In California, the California Attorney General also handles consumer complaints about scam calls. Reports feed the public data this page is built from.
Overlay and nearby area codes
Sources: FTC Do Not Call complaints (unverified consumer reports), published every weekday and available here from Jul 24; FCC Consumer Complaint Data, public record, imported nightly; NANPA numbering records. A number appearing here means consumers reported calls that displayed it. Caller ID can be spoofed.