Every US area code, explainedUnited States · +1
Area Code Contact ES
Menu
AREA CODE · CALIFORNIA

Area code 858

Area code 858 covers La Jolla, California. Map, time zone, overlays, carriers, the full list of prefixes and how to dial it.

State: California Major City: La Jolla Pacific Time (PT) Overlay: 619/858
01 / WHERE IT IS

Where is area code 858?

Area code 858 is assigned to La Jolla and the surrounding region in California. Calls to numbers that start with 858 are routed to this area.

Area code 858 shares its territory with 619. Because it is an overlay, local calls require dialing all 10 digits.

Counties covered

San Diego County

Line types

  • Mobile 24.14%
  • Landline 75.86%
02 / MAP

Area code 858 on the map

The shaded area joins the code’s numbering centers; the marker shows its main city.

Loading…

© OpenStreetMap contributors

03 / LOCAL TIME

Current time in La Jolla

This area code is in the Pacific Time (PT) time zone.

Local timeLa Jolla, CA--:--:--

Loading…

America/Los_AngelesLive
04 / HOW TO DIAL

How to call La Jolla

WITHIN THE US858 XXX XXXX

Always 10 digits — landline, mobile or VoIP. Local, long distance or a different state: the format is always the same. You do not need to dial the 1 first.

FROM ABROAD+1 858 XXX XXXX

Exit codes: 00 Europe/Mexico · 011 Canada · 010 Japan · + universal

WHATSAPP / IMESSAGE+1 858 XXX XXXX

Always save the number in international format so messaging apps recognize it correctly:

Call typeTraditional landlineMobile / VoIP
Local (same area code)10 digits10 digits
US long distance1 + 10 digits10 digits
Emergency911911
🌐Universal+1 858 555 0123
🇪🇸🇲🇽Spain / Mexico00 1 858 555 0123
🇦🇺Australia0011 1 858 555 0123
🇯🇵Japan010 1 858 555 0123
HAVE THE FULL NUMBER?

Learn more about that number.

Check the line type and the carrier the number block was originally assigned to.

10 digits to see the carrier and line type of the number

05 / CARRIERS

Carriers in area code 858

Share of the number blocks by carrier and line type.

Landline

AT&T
44%
Lumen Technologies
9%
Fractel
8%
Verizon Business
8%
Sinch
7%
Others
24%

Mobile

AT&T Mobility
37%
T-MOBILE USA
33%
Verizon Wireless
23%
USA Mobility
5%
Sinch
2%

Carrier shown is the original assignment of each number block and may differ today because of number portability.

06 / PREFIXES

Complete list of prefixes for area code 858

555 number blocks (NXX) assigned in this area code.

PrefixTypeCityCarrier
(858) 200 Landline La Jolla TPx CommunicationsU.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS
(858) 201 Landline San Diego: Mira Mesa DA Lumen TechnologiesLEVEL 3 COMMUNICATIONS, LLC - CA
(858) 202 Landline La Jolla AT&TPACIFIC BELL
(858) 203 Landline La Jolla SinchONVOY, LLC - CA
(858) 204 Mobile Poway Verizon WirelessCELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
(858) 205 Mobile Del Mar T-MOBILE USAT-MOBILE USA, INC.
(858) 206 Landline Poway SinchONVOY, LLC - CA
(858) 207 Landline Rancho Bernardo AT&TTELEPORT COMMUNICATIONS AMERICA, LLC - CA
(858) 208 Mobile Poway AT&T MobilityNEW CINGULAR WIRELESS PCS, LLC
(858) 209 Mobile Del Mar T-MOBILE USAT-MOBILE USA, INC.

Showing 10 of 555 prefixes

07 / FAQ

Frequently asked questions about area code 858

Where is area code 858 used?
Area code 858 serves La Jolla and the surrounding area in California, including San Diego County.
What city is area code 858 from?
The main city of area code 858 is La Jolla, CA.
What time zone is area code 858 in?
Area code 858 is in the Pacific Time (PT) time zone (America/Los_Angeles).
Is 858 an overlay area code?
Yes. It shares its territory with 619. In an overlay, every call requires dialing all 10 digits.
How do I call a number with area code 858 from the United States?
Dial the 10 digits: 858 + 7-digit number. For some long-distance calls from a landline you may need to add a 1 first.
How do I call a 858 number from another country?
Dial your country's exit code (or +), then 1, then 858 and the seven-digit number. From a mobile you can use +1 858 XXX XXXX.
Which carriers use area code 858?
Most landline blocks belong to AT&T and most mobile blocks to AT&T Mobility. The carrier shown is the original assignment and may differ today because of number portability.
Is area code 858 for landlines, mobiles or both?
Both. About 75.86% of the number blocks are landline, 24.14% mobile.
How do I save a 858 number in WhatsApp or my phone?
Save it in international format: +1 858 XXX XXXX. That way WhatsApp, iMessage and Telegram recognize it from any country.
Is it safe to answer calls from area code 858?
The area code only shows the region a number was assigned to; it does not tell you who is calling. Scammers can fake any area code, so do not share personal or banking information with unknown callers, and let unknown numbers go to voicemail.
KEEP EXPLORING

Nearby area codes

725Las Vegas, NV702Las Vegas, NV602Phoenix, AZ623Phoenix, AZ480Phoenix, AZ928Yuma, AZ

Other area codes in California

209 · Modesto213 · Los Angeles310 · Compton: Gardena DA323 · Los Angeles341 · Fremont-Newark: Main DA350 · Modesto369 · Santa Rosa408 · San Jose: West DA415 · San Francisco: Central DA424 · Beverly Hills442 · Victorville: Victorville DA510 · Oakland: Main-Piedmont DA530 · Chico559 · Fresno562 · Long Beach619 · San Diego: San Diego DA626 · Alhambra628 · San Francisco: Central DA650 · Palo Alto657 · Anaheim661 · Bakersfield: Main DA669 · San Jose: West DA707 · Santa Rosa714 · Anaheim747 · Burbank: Burbank DA760 · Palm Springs805 · Santa Barbara818 · Van Nuys820 · Camarillo831 · Salinas840 · Pomona909 · Ontario916 · Sacramento: Main DA925 · Walnut Creek949 · Irvine951 · Riverside

View all California area codes →