The 323 area code covers the same area as 213, including Los Angeles, Montebello and 1 more place in California.
Area code 323 is in California, on Pacific Time. In the 323 area, phone numbers are given out in Los Angeles County. It has been in service since June 13, 1998. 213 and 738 cover the same area, so two neighbours can have different area codes.
- Where
- Los Angeles County, California
- Time zone
- Pacific Time
- In service since
- June 13, 1998
- Shares its area with
- 213 (since 1947) and 738 (since 2024)
- Prefixes in use
- 786
- How to dial
- Local calls need 1, then the area code, then the number: 1-323-555-0142.
Find out who called you from a 323 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (323) number is on today, use our free carrier lookup.
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Los Angeles holds 86% of the phone prefixes in area code 323.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 786 prefixes in use shows where 323 numbers are actually given out.
- Los Angeles676 prefixes, 86%
- Montebello110 prefixes, 14%
Pacific Bell (AT&T) holds the most phone number prefixes in area code 323: 265 of 786.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 786 prefixes in use in 323 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| Pacific Bell (AT&T)AT&T's landline company | 265 | 34% |
| Metro by T-MobileT-Mobile's prepaid brand | 85 | 11% |
| T-MobileMobile network | 64 | 8% |
| Level 3 (Lumen)Lumen's business and wholesale network | 47 | 6% |
| AT&T MobilityMobile network | 39 | 5% |
| BandwidthSupplies numbers to VoIP and app-based phone services | 38 | 5% |
| 20 other carriers | 248 | 32% |
67% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
Area code 213 covers the same area and has its own page for each of its 786 prefixes.
See the 786 prefixes in area code 213 to find who NANPA lists as the holder of each one.
323 has been overlaid once since 1998.
1998
323 starts on June 13, 1998, as an overlay on 213: new numbers on the same ground.
2024
On November 1, 2024, 738 is added on top of 323, so new numbers here can get either code.
A 323 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 323 are 818, 562 and 626.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
California has 40 other area codes.
These are the questions people ask most about area code 323.
Where is area code 323?
323 covers Los Angeles, Montebello and Gardena in California. In the 323 area, phone numbers are given out in Los Angeles County.
What state is area code 323 in?
California. 323 is a California area code on Pacific Time.
What cities use area code 323?
The places holding the most 323 prefixes are Los Angeles, Montebello and Gardena. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 323?
No single phone company owns 323. NANPA's records show Pacific Bell (AT&T) holds the most 323 prefixes, 265 of 786, followed by Metro by T-Mobile and T-Mobile. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 323 in?
323 is on Pacific Time.
When did area code 323 start?
323 went into service on June 13, 1998, as an overlay on 213: new numbers for the same area.
Is 323 the same area as 213 and 738?
Yes. 213 (since 1947) and 738 (since 2024) cover the same ground as 323. Nobody's number changed when they were added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 323 number?
Local calls need 1, then the area code, then the number: 1-323-555-0142.
Is 323 a toll-free number?
No. 323 is a regular area code for Los Angeles and Montebello in California, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 323?
The closest are 818/747 (Van Nuys, California), 562 (Long Beach, California), 626 (Alhambra, California) and 714/657 (Anaheim, California), measured between the centres of each area.
Who called me from a 323 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 323 a scam?
323 is a real California area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.