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

Area code 310

Area code 310 covers Compton: Gardena DA, California. Map, time zone, overlays, carriers, the full list of prefixes and how to dial it.

State: California Major City: Compton: Gardena DA Pacific Time (PT) Overlay: 310/424
01 / WHERE IT IS

Where is area code 310?

Area code 310 is assigned to Compton: Gardena DA and the surrounding region in California. Calls to numbers that start with 310 are routed to this area.

Area code 310 shares its territory with 424. Because it is an overlay, local calls require dialing all 10 digits.

Counties covered

Los Angeles County

Line types

  • Mobile 28.37%
  • Landline 71.63%
02 / MAP

Area code 310 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 Compton: Gardena DA

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

Local timeCompton: Gardena DA, CA--:--:--

Loading…

America/Los_AngelesLive
04 / HOW TO DIAL

How to call Compton: Gardena DA

WITHIN THE US310 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+1 310 XXX XXXX

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

WHATSAPP / IMESSAGE+1 310 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+1 310 555 0123
🇪🇸🇲🇽Spain / Mexico00 1 310 555 0123
🇦🇺Australia0011 1 310 555 0123
🇯🇵Japan010 1 310 555 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 310

Share of the number blocks by carrier and line type.

Landline

AT&T
49%
Ziply Fiber
24%
Verizon Business
8%
Lumen Technologies
6%
TPx Communications
4%
Others
9%

Mobile

AT&T Mobility
30%
T-MOBILE USA
26%
Verizon Wireless
25%
USA Mobility
16%
33 Wireless
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 310

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

PrefixTypeCityCarrier
(310) 200 Mobile Compton: Gardena DA AT&T MobilityNEW CINGULAR WIRELESS PCS, LLC
(310) 201 Landline Beverly Hills AT&TPACIFIC BELL
(310) 202 Landline Culver City AT&TPACIFIC BELL
(310) 203 Landline Beverly Hills AT&TPACIFIC BELL
(310) 204 Landline Culver City AT&TPACIFIC BELL
(310) 205 Landline Beverly Hills AT&TPACIFIC BELL
(310) 206 Landline West Los Angeles Ziply FiberFRONTIER CALIFORNIA INC.
(310) 207 Landline West Los Angeles Ziply FiberFRONTIER CALIFORNIA INC.
(310) 208 Landline West Los Angeles Ziply FiberFRONTIER CALIFORNIA INC.
(310) 209 Landline West Los Angeles Ziply FiberFRONTIER CALIFORNIA INC.

Showing 10 of 786 prefixes

07 / FAQ

Frequently asked questions about area code 310

Where is area code 310 used?
Area code 310 serves Compton: Gardena DA and the surrounding area in California, including Los Angeles County.
What city is area code 310 from?
The main city of area code 310 is Compton: Gardena DA, CA.
What time zone is area code 310 in?
Area code 310 is in the Pacific Time (PT) time zone (America/Los_Angeles).
Is 310 an overlay area code?
Yes. It shares its territory with 424. In an overlay, every call requires dialing all 10 digits.
How do I call a number with area code 310 from the United States?
Dial the 10 digits: 310 + 7-digit number. For some long-distance calls from a landline you may need to add a 1 first.
How do I call a 310 number from another country?
Dial your country's exit code (or +), then 1, then 310 and the seven-digit number. From a mobile you can use +1 310 XXX XXXX.
Which carriers use area code 310?
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 310 for landlines, mobiles or both?
Both. About 71.63% of the number blocks are landline, 28.37% mobile.
How do I save a 310 number in WhatsApp or my phone?
Save it in international format: +1 310 XXX XXXX. That way WhatsApp, iMessage and Telegram recognize it from any country.
Is it safe to answer calls from area code 310?
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, NV928Yuma, AZ480Phoenix, AZ602Phoenix, AZ623Phoenix, AZ

Other area codes in California

209 · Modesto213 · Los Angeles323 · 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 · Pomona858 · La Jolla909 · Ontario916 · Sacramento: Main DA925 · Walnut Creek949 · Irvine951 · Riverside

View all California area codes →