Area code 820 is assigned for use in California since Jun 30, 2018. This area code originated from the 805 area code previously by means of area code split or overlay. View all phone prefixes used in area code 820 or other area codes in California. Included with the location of each prefix are the phone companies / service providers that operates them.
| Area code / prefix | Location | Company / Service Provider |
|---|---|---|
| 820-200 | Thousand Oaks, CA | ADVANCED TELECOM SOLUTIONS, LLC |
| 820-201 | OXNARD, CA | SHELCOMM |
| 820-202 | San Luis Obispo, CA | CSC WIRELESS, LLC |
| 820-203 | ATASCADERO, CA | T-MOBILE USA, INC. |
| 820-204 | CAMARILLO, CA | NEW CINGULAR WIRELESS PCS, LLC |
| 820-205 | NEWBURY PARK, CA | NEW CINGULAR WIRELESS PCS, LLC |
| 820-206 | Paso Robles, CA | T-MOBILE USA, INC. |
| 820-207 | CAMARILLO, CA | NEW CINGULAR WIRELESS PCS, LLC |
| 820-208 | ATASCADERO, CA | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS |
| 820-209 | GAVIOTA, CA | BANDWIDTH.COM CLEC, LLC - CA |
| 820-210 | CAMARILLO, CA | NEW CINGULAR WIRELESS PCS, LLC |
| 820-212 | Ventura East, CA | NEW CINGULAR WIRELESS PCS, LLC |
| 820-213 | CAMARILLO, CA | NEW CINGULAR WIRELESS PCS, LLC |
| 820-214 | NEWBURY PARK, CA | NEW CINGULAR WIRELESS PCS, LLC |
| 820-215 | NEWBURY PARK, CA | NEW CINGULAR WIRELESS PCS, LLC |
| 820-216 | ARROYO GRANDE, CA | DISH WIRELESS, LLC |
| 820-217 | ATASCADERO, CA | DISH WIRELESS, LLC |
| 820-218 | LOMPOC, CA | NEW CINGULAR WIRELESS PCS, LLC |
| 820-219 | CONEJO, CA | COMMIO, LLC |
| 820-220 | PIRU, CA | COMMIO, LLC |
| 820-221 | Santa Maria, CA | NEW CINGULAR WIRELESS PCS, LLC |
| 820-222 | CAMARILLO, CA | FRACTEL, LLC |
| 820-223 | Santa Barbara, CA | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA |
| 820-224 | NIPOMO, CA | COMMIO, LLC |
| 820-225 | GUADALUPE, CA | T-MOBILE USA, INC. |
| 820-226 | EL RIO, CA | ONVOY, LLC - CA |
| 820-227 | Santa Maria, CA | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA |
| 820-234 | OXNARD, CA | FRACTEL, LLC |
| 820-280 | LOS ALAMOS, CA | HD CARRIER LLC |
| 820-288 | Ventura East, CA | FRACTEL, LLC |
| 820-299 | CAMARILLO, CA | FRACTEL, LLC |
| 820-300 | GUADALUPE, CA | ONVOY, LLC - CA |
| 820-333 | Thousand Oaks, CA | FRACTEL, LLC |
| 820-336 | GUADALUPE, CA | FRACTEL, LLC |
| 820-345 | EL RIO, CA | FRACTEL, LLC |
| 820-346 | ARROYO GRANDE, CA | FRACTEL, LLC |
| 820-348 | OXNARD, CA | FRACTEL, LLC |
| 820-356 | POINT MUGU, CA | FRACTEL, LLC |
| 820-380 | Pismo Beach, CA | ONVOY, LLC - CA |
| 820-386 | Simi Valley, CA | FRACTEL, LLC |
| 820-400 | PARKFIELD, CA | TWILIO INTERNATIONAL, INC. |
| 820-426 | CAMARILLO, CA | TON80 COMMUNICATIONS, LLC |
| 820-432 | NEWBURY PARK, CA | FRACTEL, LLC |
| 820-444 | NEWBURY PARK, CA | FRACTEL, LLC |
| 820-465 | OXNARD, CA | FRACTEL, LLC |
| 820-500 | GAVIOTA, CA | FRACTEL, LLC |
| 820-502 | Simi Valley, CA | ONVOY SPECTRUM, LLC |
| 820-529 | PIRU, CA | FRACTEL, LLC |
| 820-587 | Santa Barbara, CA | FRACTEL, LLC |
| 820-600 | Pismo Beach, CA | FRACTEL, LLC |
| New numbers being added to 820 area code |
|---|
|
Effective: 05/12/2024 820-226 in EL RIO, CA ONVOY, LLC - CA |
|
Effective: 05/15/2024 820-227 in SANTA MARIA, CA CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA |
| 820 Area Code Information | ||
|---|---|---|
| Type of code: | General Purpose Code | |
| Location: | CA - US | |
| Time zone: | P | |
| Assigned for use: | Yes | |
| Code in service: | Yes | |
| Service date: | 06/30/18 | |
| In jeopardy: | No | |
| Relief in progress: | No | |
| NPA Relief status: | ||
| Code assignable: | Yes | |
| Geographic or non-geographic: |
G | |
| Reserved for future use: | No | |
| Planning letter(s): | 509 | |
| Overlay code: | Yes | |
| Overlay complex: | 805/820 | |
| Dialing plan | Standard | Permissive |
| Home local calls: | 1+10D | NA |
| Foreign local calls: | 1+10D | NA |
| Home toll calls: | 1+10D | NA |
| Foreign toll calls: | 1+10D | - |