The 559 area code is a telephone area code serving the central San Joaquin Valley in central California. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 559 area code) below and access available caller information such as name, address, and more.
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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 January 1, 1947.
Our reverse phone lookup will analyze the three-digit prefix of any 559 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, California geographic region, and local calling area associated with the phone number.
| 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 |
| 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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