The 559 area code covers Fresno, Visalia and 52 more places in California.
Area code 559 is in California, on Pacific Time. In the 559 area, phone numbers are given out most in Fresno County, then Tulare and Kings counties. It has been in service since November 14, 1998. 357 covers the same area, so two neighbours can have different area codes.
- Where
- 5 counties in California, mostly Fresno County, Tulare County and Kings County
- Time zone
- Pacific Time
- In service since
- November 14, 1998
- Shares its area with
- 357 (since 2025)
- Prefixes in use
- 785
- How to dial
- Local calls need 1, then the area code, then the number: 1-559-555-0142.
Find out who called you from a 559 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 (559) number is on today, use our free carrier lookup.
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Fresno holds 34% of the phone prefixes in area code 559.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 785 prefixes in use shows where 559 numbers are actually given out.
- Fresno264 prefixes, 34%
- Visalia83 prefixes, 11%
- Clovis41 prefixes, 5%
- Madera34 prefixes, 4%
- Hanford31 prefixes, 4%
- Porterville29 prefixes, 4%
- Tulare25 prefixes, 3%
- Lemoore13 prefixes, 2%
Also served: Reedley, Dinuba, Selma and Chowchilla and 42 smaller places.
Pacific Bell (AT&T) holds the most phone number prefixes in area code 559: 182 of 785.
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 785 prefixes in use in 559 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 | 182 | 23% |
| AT&T MobilityMobile network | 123 | 16% |
| Level 3 (Lumen)Lumen's business and wholesale network | 70 | 9% |
| T-MobileMobile network | 56 | 7% |
| BandwidthSupplies numbers to VoIP and app-based phone services | 36 | 5% |
| Metro by T-MobileT-Mobile's prepaid brand | 23 | 3% |
| 38 other carriers | 295 | 38% |
79% 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.
559 has been overlaid once since 1998.
1998
559 starts on November 14, 1998, split off from 209.
2025
On March 26, 2025, 357 is added on top of 559, so new numbers here can get either code.
A 559 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 559 are 209, 831 and 661.
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 559.
Where is area code 559?
559 covers Fresno, Visalia, Clovis and Madera and 50 more places in California. In the 559 area, phone numbers are given out most in Fresno County, then Tulare and Kings counties.
What state is area code 559 in?
California. 559 is a California area code on Pacific Time.
What cities use area code 559?
The places holding the most 559 prefixes are Fresno, Visalia, Clovis, Madera, Hanford, Porterville, Tulare and Lemoore, out of 54 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 559?
No single phone company owns 559. NANPA's records show Pacific Bell (AT&T) holds the most 559 prefixes, 182 of 785, followed by AT&T Mobility and Level 3 (Lumen). Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 559 in?
559 is on Pacific Time.
When did area code 559 start?
559 went into service on November 14, 1998, when it was split off from 209.
Is 559 the same area as 357?
Yes. 357 (since 2025) covers the same ground as 559. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 559 number?
Local calls need 1, then the area code, then the number: 1-559-555-0142.
Is 559 a toll-free number?
No. 559 is a regular area code for Fresno and Visalia 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 559?
The closest are 209/350 (Stockton, California), 831 (Salinas, California), 661 (Bakersfield, California) and 805/820 (Santa Barbara, California), measured between the centres of each area.
Who called me from a 559 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 559 a scam?
559 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.