Look up any phone number starting with 559 to identify the owner name, address, spam reports, and more. The 559 area code is a telephone area code serving the central San Joaquin Valley in central California.
Enter a full 10-digit number to identify the caller and whether it has been reported as spam.
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The 559 area code covers the central San Joaquin Valley in central California.
Area code 559 is part of an overlay complex with area code 357 . Both area codes serve the same geographic region. Area code 559 was placed in service in 1998, and area code 357 was added in 2025. Ten-digit dialing is required in the central San Joaquin Valley.
Area code 559 is a general purpose code which was placed in service on November 14, 1998.
Our California phone number lookup for the 559 area code analyzes the three-digit prefix to identify the initially assigned telecommunications company and rate center. This prefix code data may help to determine the U.S. carrier, California geographic region, and local calling area associated with the phone number.
Phone numbers follow the following structure under the North American Numbering Plan:
Understanding the area code can help you determine if a call is local to your area. However, keep in mind that due to mobile number portability and VoIP services, the caller may be anywhere in the United States, so it’s best to search for the most recent phone number details.
| Company | Number of Prefixes |
|---|---|
| PACIFIC BELL | 169 |
| NEW CINGULAR WIRELESS PCS, LLC | 59 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 27 |
| SPRINT SPECTRUM, L.P. | 26 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 20 |
| FRONTIER CALIFORNIA INC. | 19 |
| T-MOBILE USA, INC. | 16 |
| ONVOY, LLC - CA | 14 |
| O1 COMMUNICATIONS, INC. - CA | 12 |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 10 |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 9 |
| BANDWIDTH.COM CLEC, LLC - CA | 8 |
| PONDEROSA TEL. CO. | 6 |
| SIERRA TEL. CO., INC. | 5 |
| AT&T CORP. | 4 |
| COMCAST IP PHONE, LLC | 4 |
| AT&T - LOCAL | 3 |
| KERMAN TEL. CO. | 3 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 3 |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 3 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2 |
| WIDE VOICE, LLC - CA | 2 |
| BCM ONE CLOUD COMMUNICATIONS, LLC | 1 |
| CENTURYLINK COMMUNICATIONS, LLC | 1 |
| DUCOR TEL. CO. | 1 |
| HD CARRIER LLC | 1 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 1 |
| NUSO, LLC | 1 |
| RADIANTIQ LLC | 1 |
| TERRA NOVA TELECOM INC. | 1 |
| UTILITY TELECOM GROUP, LLC - CA | 1 |
| XO CALIFORNIA, INC. | 1 |
| YMAX COMMUNICATIONS CORP. - CA | 1 |
Carrier names have been updated from their original FCC assignments to reflect current companies following mergers, acquisitions, and rebranding. Updates were determined using AI-assisted research and may not be accurate or reflect up to date changes. This data is provided without warranties of accuracy or completeness.
| Rate Center | Number of Prefixes |
|---|---|
| FRESNO | 181 |
| VISALIA | 49 |
| CLOVIS | 24 |
| HANFORD | 22 |
| PORTERVL | 19 |
| MADERA | 16 |
| TULARE | 12 |
| REEDLEY | 8 |
| DINUBA | 7 |
| LEMOORE | 7 |
| SELMA | 7 |
| COARSEGOLD | 6 |
| CARUTHERS | 4 |
| SANGER | 4 |
| SANJOAQUIN | 4 |
| KERMAN | 3 |
| KINGSBURG | 3 |
| LATON | 3 |
| LINDSAY | 3 |
| RIVERDALE | 3 |
| AVENAL | 2 |
| BURREL | 2 |
| CHOWCHILLA | 2 |
| COALINGA | 2 |
| EXETER | 2 |
| FIREBAUGH | 2 |
| FOWLER | 2 |
| HURON | 2 |
| MENDOTA | 2 |
| PARLIER | 2 |
| SPRINGVL | 2 |
| STRATFORD | 2 |
| TERRABELLA | 2 |
| TIVYVALLEY | 2 |
| WOODLAKE | 2 |
| ALPAUGH | 1 |
| AUBERRY | 1 |
| BADGER | 1 |
| BIG CREEK | 1 |
| CORCORAN | 1 |
| DEL REY | 1 |
| DUCOR | 1 |
| DUNLAP | 1 |
| FRIANT | 1 |
| GRANTGROVE | 1 |
| NORTH FORK | 1 |
| O NEALS | 1 |
| ORANGECOVE | 1 |
| PIXLEY | 1 |
| RAYMOND | 1 |
| SEQUOIA | 1 |
| SHAVER | 1 |
| SQUAW VLY | 1 |
| THREERIVRS | 1 |
| TIPTON | 1 |
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