California · Pacific Time
559 Area Code
Area code 559 is in California, serving southern San Joaquin Valley including Fresno, Visalia, Clovis and Hanford. It is in the Pacific Time zone. It shares its territory with overlay code 357, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 559 area code?
559 is a California area code covering southern San Joaquin Valley including Fresno, Visalia, Clovis and Hanford. In the wider directory it sits in the West region.
Cities in the 559 area code
- Fresno
- Visalia
- Clovis
- Hanford
- Tulare
- Madera
- Porterville
- Reedley
- Selma
- Sanger
- Lemoore
- Dinuba
Counties served by 559
Fresno County, Tulare County, Kings County and Madera County.
559 overlay codes and dialing
The 559 territory is covered by an overlay of 2 area codes: 357, 559. All of them serve the same geographic area, and the original code is 559. Because more than one code covers the same ground, 10-digit dialing is mandatory — you must dial the area code for every local call. New phone lines may be assigned any of these codes.
History of the 559 area code
559 went into service on November 14, 1998, created when it was split from 209. It serves Fresno and the surrounding part of California, and today shares its territory with overlay code 357. For how codes are created, split, and overlaid, see how area codes work.
Is 559 a scam or spam risk?
559 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 559 number on your screen is no guarantee the caller is in Fresno, CA or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other California area codes
Explore more
See every code in California, compare codes across the West region, or view all Pacific Time codes. You can also browse the 5XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
559 area code FAQ
Where is the 559 area code?
The 559 area code is in California, covering southern San Joaquin Valley including Fresno, Visalia, Clovis and Hanford, in the West region.
What cities are in the 559 area code?
Cities in the 559 area code include Fresno, Visalia, Clovis, Hanford, Tulare, Madera, Porterville, Reedley, Selma and Sanger.
What time zone is 559 in?
559 is in the Pacific Time zone.
What is the overlay for the 559 area code?
559 shares its territory with 357. Both codes (357, 559) serve the same area, so 10-digit dialing is required for every call.
When did the 559 area code start?
559 went into service on November 14, 1998.
Do I have to dial 10 digits for 559?
Yes. Because 559 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 559 a toll-free or premium code?
No. 559 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.