Area Code 820 is found in the US state of California.
| AreaCode/Prefix |
Location |
View |
| 820-200 | Thousaoaks, California | More Info → |
| 820-201 | Oxnard, California | More Info → |
| 820-222 | Camarillo, California | More Info → |
| 820-300 | Guadalupe, California | More Info → |
| 820-333 | Thousaoaks, California | More Info → |
| 820-400 | Parkfield, California | More Info → |
| 820-444 | Newburyprk, California | More Info → |
| 820-666 | Snlusobspo, California | More Info → |
| 820-777 | Santapaula, California | More Info → |
| 820-888 | Simivalley, California | More Info → |
| 820-999 | Oxnard, California | More Info → |