The 858 area code is a telephone area code serving most of San Diego County in California. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 858 area code) below and access available caller information such as name, address, and more.
Federal Data
State Data
County Data
City Data
Phone numbers with the 858 area code originate from areas within San Diego County, including areas that were initially designated as northwest San Diego County.
Area code 858 is part of an overlay complex with area code 619. Area code 619 was created in 1982, and 858 was introduced in 1999. In June 2018, the boundary between 619 and 858 was eliminated, making them overlay area codes. Ten-digit local dialing became mandatory at that time.
Area code 858 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 858 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 | 141 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 21 |
| NEW CINGULAR WIRELESS PCS, LLC | 20 |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 18 |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 17 |
| SPRINT SPECTRUM, L.P. | 15 |
| XO CALIFORNIA, INC. | 15 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 13 |
| T-MOBILE USA, INC. | 12 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 10 |
| ONVOY, LLC - CA | 10 |
| COMCAST IP PHONE, LLC | 9 |
| LEVEL 3 COMMUNICATIONS, LLC - CA | 7 |
| O1 COMMUNICATIONS, INC. - CA | 6 |
| PAETEC COMMUNICATIONS, INC. - CA | 6 |
| AT&T - LOCAL | 4 |
| BANDWIDTH.COM CLEC, LLC - CA | 4 |
| GLOBAL CROSSING LOCAL SERVICES, INC. - CA | 4 |
| MATRIX TELECOM, LLC. S/I/I TNCI - CA | 4 |
| TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB | 2 |
| YMAX COMMUNICATIONS CORP. - CA | 2 |
| AMERICAN MESSAGING SERVICES, LLC | 1 |
| AT&T CORP. | 1 |
| LOCAL ACCESS SERVICES LLC - CA | 1 |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 1 |
| TERRA NOVA TELECOM INC. | 1 |
| TON80 COMMUNICATIONS, LLC | 1 |
| Rate Center | Number of Prefixes |
|---|---|
| LA JOLLA | 128 |
| SNDG LVTA | 56 |
| SNDG MRMS | 46 |
| POWAY | 33 |
| DEL MAR | 32 |
| RNCHOBRNDO | 29 |
| RNCHOPNQTS | 13 |
| RNCHOSANFE | 8 |
| SNDG SNDG | 1 |
Lookup phone numbers starting with other California area codes:
California Reverse Lookup ➜