California, United States
Pacific Time
5:50 PM
Area Code
820
State / Province
California
Country
United States
Time Zone
Pacific Time
Area code 820 covers 31 cities and communities across California, based on telephone company rate center data.
Use the E.164 format for clickable phone links (RFC 3966):
<a href="tel:+18205550100">+18205550100</a><a href="tel:+18205550199">+18205550199</a>Look up which exchange in California a specific 820 number is homed to, and whether its block is wireline or wireless. See what a reverse lookup can establish before relying on the answer.
94 active prefixes in this area code, assigned as 891 thousands-blocks — pooling splits one prefix across several carriers, so each block is listed separately with the rate centre it is homed to, its carrier of record, and the switch that serves it.
Showing blocks 1–100 of 891
| NPA-NXX | Block | Rate centre | Type | Carrier (OCN) | Switch | LATA | LIR | Dates |
|---|---|---|---|---|---|---|---|---|
| 820-200 | 0 | Thousand Oaks | Landline or VoIP | ADVANCED TELECOM SOLUTIONS, LLC (181J) | LSANCARCY0X | 730 | — | — |
| 820-200 | 1 | Thousand Oaks | Landline or VoIP | ONVOY, LLC - CA (649C) | SNMNCAXPX3Z | 730 | — | — |
| 820-200 | 2 | Thousand Oaks | Landline or VoIP | VONAGE AMERICA LLC (197D) | LSANCAJW5MD | 730 | — | — |
| 820-200 | 3 | Thousand Oaks | Landline or VoIP | VONAGE AMERICA LLC (197D) | LSANCAJW5MD | 730 | — | — |
| 820-200 | 4 | Thousand Oaks | Landline or VoIP | ONVOY, LLC - CA (649C) | SNMNCAXPX3Z | 730 | — | — |
| 820-200 | 5 | Thousand Oaks | Landline or VoIP | ONVOY, LLC - CA (649C) | SNMNCAXPX3Z | 730 | — | — |
| 820-200 | 6 | Thousand Oaks | Landline or VoIP | ONVOY, LLC - CA (649C) | SNMNCAXPX3Z | 730 | — | — |
| 820-200 | 7 | Thousand Oaks | Wireless | ONVOY SPECTRUM, LLC (624H) | SNMNCAXPX2Z | 730 | — | — |
| 820-200 | 8 | Thousand Oaks | Wireless | ONVOY SPECTRUM, LLC (624H) | SNMNCAXPX2Z | 730 | — | — |
| 820-200 | 9 | Thousand Oaks | Wireless | T-MOBILE USA, INC. (6529) | TRNECAGBGT3 | 730 | — | — |
| 820-200 | A | Thousand Oaks | Landline or VoIP | ADVANCED TELECOM SOLUTIONS, LLC (181J) | LSANCARCY0X | 730 | — | — |
| 820-201 | A | Oxnard | Wireless | SHELCOMM (0051) | BALDWIN PARK | 730 | — | — |
| 820-202 | 0 | San Luis Obispo | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | SNLOCA01XEY | 740 | — | — |
| 820-202 | 1 | San Luis Obispo | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | SNLOCA01XEY | 740 | — | — |
| 820-202 | 2 | San Luis Obispo | Wireless | CSC WIRELESS, LLC (425J) | SNLOCA01Y1X | 740 | — | — |
| 820-202 | 8 | San Luis Obispo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SNLOCA01X1Y | 740 | — | — |
| 820-202 | 9 | San Luis Obispo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SNLOCA01X1Y | 740 | — | — |
| 820-202 | A | San Luis Obispo | Wireless | CSC WIRELESS, LLC (425J) | SNLOCA01Y1X | 740 | — | — |
| 820-203 | 0 | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-203 | 1 | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-203 | 2 | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-203 | 3 | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-203 | 4 | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-203 | 5 | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-203 | 6 | Atascadero | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SNLOCA01X1Y | 740 | — | — |
| 820-203 | 7 | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-203 | 8 | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-203 | 9 | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-203 | A | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-204 | 0 | Camarillo | Landline or VoIP | ONVOY, LLC - CA (649C) | SNMNCAXPX3Z | 730 | — | — |
| 820-204 | 1 | Camarillo | Landline or VoIP | ONVOY, LLC - CA (649C) | SNMNCAXPX3Z | 730 | — | — |
| 820-204 | 2 | Camarillo | Landline or VoIP | ONVOY, LLC - CA (649C) | SNMNCAXPX3Z | 730 | — | — |
| 820-204 | 3 | Camarillo | Landline or VoIP | ONVOY, LLC - CA (649C) | SNMNCAXPX3Z | 730 | — | — |
| 820-204 | 5 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-204 | 6 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-204 | 7 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-204 | 8 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-204 | 9 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-204 | A | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-205 | 0 | Newbury Park | Landline or VoIP | ONVOY, LLC - CA (649C) | SNMNCAXPX3Z | 730 | — | — |
| 820-205 | 1 | Newbury Park | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-205 | 2 | Newbury Park | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-205 | 3 | Newbury Park | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-205 | 4 | Newbury Park | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-205 | 5 | Newbury Park | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-205 | 6 | Newbury Park | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-205 | 7 | Newbury Park | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-205 | 8 | Newbury Park | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-205 | 9 | Newbury Park | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-205 | A | Newbury Park | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-206 | 0 | Paso Robles | Landline or VoIP | COMMIO, LLC (939H) | SNBBCAXFXCY | 740 | — | — |
| 820-206 | 1 | Paso Robles | Landline or VoIP | METROPCS, INC. (5562) | SNLOCA01XYX | 740 | — | — |
| 820-206 | 2 | Paso Robles | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | SNLOCA01XEY | 740 | — | — |
| 820-206 | 3 | Paso Robles | Landline or VoIP | ONVOY, LLC - CA (649C) | SNLOCA01XFX | 740 | — | — |
| 820-206 | 4 | Paso Robles | Landline or VoIP | ONVOY, LLC - CA (649C) | SNLOCA01XFX | 740 | — | — |
| 820-206 | 5 | Paso Robles | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | SNLOCA01X1Y | 740 | — | — |
| 820-206 | 6 | Paso Robles | Landline or VoIP | ONVOY, LLC - CA (649C) | SNLOCA01XFX | 740 | — | — |
| 820-206 | 7 | Paso Robles | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | SNLOCA01XEY | 740 | — | — |
| 820-206 | 8 | Paso Robles | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (6006) | SNLOCA01XEY | 740 | — | — |
| 820-206 | 9 | Paso Robles | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-206 | A | Paso Robles | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-207 | 0 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-207 | 1 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-207 | 2 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-207 | 3 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-207 | 4 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-207 | 5 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-207 | 6 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-207 | 7 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-207 | 8 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-207 | 9 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-207 | A | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-208 | 0 | Atascadero | Landline or VoIP | ONVOY, LLC - CA (649C) | SNLOCA01XFX | 740 | — | — |
| 820-208 | 1 | Atascadero | Landline or VoIP | ONVOY, LLC - CA (649C) | SNLOCA01XFX | 740 | — | — |
| 820-208 | 2 | Atascadero | Landline or VoIP | COMMIO, LLC (939H) | SNBBCAXFXCY | 740 | — | — |
| 820-208 | 3 | Atascadero | Landline or VoIP | ONVOY, LLC - CA (649C) | SNLOCA01XFX | 740 | — | — |
| 820-208 | 4 | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-208 | 5 | Atascadero | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | SNLOCA01XOY | 740 | — | — |
| 820-208 | 6 | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-208 | 7 | Atascadero | Wireless | T-MOBILE USA, INC. (6529) | SNLOCA01XYX | 740 | — | — |
| 820-208 | 8 | Atascadero | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | SNLOCA01XOY | 740 | — | — |
| 820-208 | 9 | Atascadero | Landline or VoIP | COMMIO, LLC (939H) | SNBBCAXFXCY | 740 | — | — |
| 820-208 | A | Atascadero | Landline or VoIP | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS (671J) | SNLOCA01XOY | 740 | — | — |
| 820-209 | 0 | Gaviota | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | SNLOCA01XCX | 740 | — | — |
| 820-209 | 7 | Gaviota | Landline or VoIP | OPENTACT INC. (824J) | — | 740 | — | — |
| 820-209 | 9 | Gaviota | Wireless | ONVOY SPECTRUM, LLC (624H) | SNBBCAXFXFY | 740 | — | — |
| 820-209 | A | Gaviota | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - CA (981E) | SNLOCA01XCX | 740 | — | — |
| 820-210 | 0 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-210 | 1 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-210 | 2 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-210 | 3 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-210 | 4 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-210 | 5 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-210 | 6 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-210 | 7 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-210 | 8 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-210 | 9 | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-210 | A | Camarillo | Wireless | NEW CINGULAR WIRELESS PCS, LLC (6010) | COMMERCE | 730 | — | — |
| 820-212 | 0 | Ventura East | Wireless | BOOST SUBSCRIBERCO L.L.C. (490J) | LSANCAJWMMD | 730 | — | — |
| 820-212 | 1 | Ventura East | Landline or VoIP | ONVOY, LLC - CA (649C) | — | 730 | — | — |
Block-level assignments from the North American Numbering Plan administrator, via localcallingguide.com.
Assigned Prefixes
94
Assignment Blocks
891
Rate Centers
31
Carriers of Record
34
| Type | Blocks | Share |
|---|---|---|
| Landline or VoIP | 451 | 51% |
| Wireless | 440 | 49% |
| Carrier | Blocks |
|---|---|
| ONVOY, LLC - CA | 234 |
| NEW CINGULAR WIRELESS PCS, LLC | 205 |
| T-MOBILE USA, INC. | 112 |
| FRACTEL, LLC | 76 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 61 |
| ONVOY SPECTRUM, LLC | 53 |
| COMMIO, LLC | 31 |
| BANDWIDTH.COM CLEC, LLC - CA | 27 |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 11 |
| NUSO, LLC | 9 |
| 24 other carriers | 72 |
Carrier of record for each block. Numbers ported to another carrier keep their original block assignment, so this is not a lookup of who serves a given number today.
| Rate Center | Prefixes | Blocks |
|---|---|---|
| Camarillo | 11 | 112 |
| Atascadero | 8 | 85 |
| Newbury Park | 8 | 80 |
| Oxnard | 8 | 77 |
| Santa Barbara | 8 | 76 |
| Santa Maria | 6 | 61 |
| El Rio | 3 | 27 |
| Guadalupe | 3 | 30 |
| Paso Robles | 3 | 24 |
| San Luis Obispo | 3 | 16 |
| Simi Valley | 3 | 33 |
| Ventura Central | 3 | 25 |
| Arroyo Grande | 2 | 22 |
| Gaviota | 2 | 15 |
| Lompoc | 2 | 22 |
| Piru | 2 | 14 |
| Pismo Beach | 2 | 18 |
| Santa Paula | 2 | 16 |
| Thousand Oaks | 2 | 22 |
| Ventura East | 2 | 22 |
| Bradley | 1 | 10 |
| Cayucos | 1 | 11 |
| Conejo | 1 | 9 |
| Fillmore | 1 | 5 |
| Los Alamos | 1 | 8 |
| Nipomo | 1 | 7 |
| Oakview | 1 | 10 |
| Ojai | 1 | 2 |
| Parkfield | 1 | 10 |
| Point Mugu | 1 | 11 |
| Santa Ynez | 1 | 11 |
A rate center is the telephone exchange area a number is homed to. It sets local calling boundaries, and is not the caller's current location.
Area code 820 is a North American Numbering Plan (NANP) telephone area code assigned to California, United States. It is one of 41 area codes serving California. As population and demand for phone numbers grew, the region was divided into multiple numbering plan areas to avoid exhausting the available 7-digit number pool.
Yes. 820 is an active North American Numbering Plan (NANP) area code, currently assigned to California, United States. It is safe to answer or dial calls using this area code.
Area code 820 covers 31 cities and communities in California, including Arroyo Grande, Atascadero, Bradley, Camarillo, Cayucos, and 26 more localities. This is based on telephone company rate center data — the geographic areas carriers use to determine local calling boundaries and to assign numbers when a business or individual requests a phone number in a specific city.
All numbers in the 820 area code observe Pacific Time (IANA timezone: America/Los_Angeles). Pacific Time is UTC−8 in winter (PST) and UTC−7 in summer (PDT). When placing a call to a 820 number from a different time zone, check the current local time above to avoid calling outside of business hours.
From within California, dial the 7-digit local number directly if calling within the same rate center, or dial 1 + 820 + 7-digit number for long-distance calls within North America. From outside the US or Canada, dial your country's international exit code followed by 1 820 XXX XXXX. The country code for both the United States and Canada in NANP is +1.
Format 820 numbers using E.164 notation as required by RFC 3966: prefix with +1 and omit dashes and parentheses (e.g., +18205550100). This format ensures tel: links work correctly on all mobile browsers and VoIP apps. See the tel: URI formatting guide for complete examples.