The 661 area code serves the southern part of the San Joaquin Valley and the far northern part of the Los Angeles metropolitan area, in the U.S. state of California. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 661 area code) below and access available caller information such as name, address, and more.
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The numbering plan area includes most of Kern County, most of northern Los Angeles County (specifically the Santa Clarita Valley, the Antelope Valley and the surrounding mountains), and small parts of Ventura County, Santa Barbara County, and Tulare County.
Area code 661 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 661 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 | 138 |
| NEW CINGULAR WIRELESS PCS, LLC | 44 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 28 |
| FRONTIER CALIFORNIA INC. | 27 |
| SPRINT SPECTRUM, L.P. | 23 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 18 |
| T-MOBILE USA, INC. | 14 |
| ONVOY, LLC - CA | 12 |
| O1 COMMUNICATIONS, INC. - CA | 11 |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 9 |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 9 |
| AT&T - LOCAL | 7 |
| BANDWIDTH.COM CLEC, LLC - CA | 7 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 6 |
| PAETEC COMMUNICATIONS, INC. - CA | 4 |
| AT&T CORP. | 3 |
| BRIGHT HOUSE NTWS INFORMATION SVCS (CALIFORNIA) CA | 3 |
| METROPCS NETWORKS, LLC | 3 |
| METROPCS, INC. | 3 |
| 33 WIRELESS INC. | 1 |
| CENTURYLINK COMMUNICATIONS, LLC | 1 |
| INTRADO COMMUNICATIONS, LLC | 1 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 1 |
| NUSO, LLC | 1 |
| PACIFIC BELL (COMPETITIVE) | 1 |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 1 |
| RADIANTIQ LLC | 1 |
| TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB | 1 |
| UTILITY TELECOM GROUP, LLC - CA | 1 |
| XO CALIFORNIA, INC. | 1 |
| YMAX COMMUNICATIONS CORP. - CA | 1 |
| Rate Center | Number of Prefixes |
|---|---|
| BKFD MAIN | 106 |
| PLDL PLDL | 55 |
| SNCA NHCS | 52 |
| LANCASTER | 34 |
| BKFD SOUTH | 32 |
| SNCA SGCC | 20 |
| BKFD NORTH | 19 |
| DELANO | 8 |
| TAFT | 7 |
| ARVIN | 6 |
| EDWARDS | 6 |
| TEHACHAPI | 6 |
| LEBEC | 5 |
| MOJAVE | 4 |
| SHAFTER | 4 |
| MCFARLAND | 3 |
| PLDL AGDL | 3 |
| WASCO | 3 |
| HI VISTA | 2 |
| LAKEHUGHES | 2 |
| LOST HILLS | 2 |
| BUTTONWLLW | 1 |
| CLFRNHTSPG | 1 |
| CUYAMA | 1 |
| EARLIMART | 1 |
| GLENNVILLE | 1 |
| MCKITTRICK | 1 |
| PLDL LNVY | 1 |
| ROSAMOND | 1 |
| WALKERBSIN | 1 |
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