The Area Codes of United States of America:
| City/Town or Region | Area code | |
|---|---|---|
| 1. | California | 619 |
| 2. | California | 562 |
| 3. | California | 628 |
| 4. | California | 650 |
| 5. | California | 657 |
| 6. | California | 661 |
| 7. | California | 408 |
| 8. | California | 415 |
| 9. | California | 424 |
| 10. | California | 442 |
| 11. | California | 626 |
| 12. | California | 559 |
| 13. | California | 530 |
| 14. | California | 510 |
| 15. | California | 323 |
| 16. | California | 310 |
| 17. | California | 951 |
| 18. | California | 949 |
| 19. | California | 925 |
| 20. | California | 916 |
| 21. | California | 209 |
| 22. | California | 213 |
| 23. | California | 669 |
| 24. | California | 707 |
| 25. | California | 714 |
| 26. | California | 747 |
| 27. | California | 760 |
| 28. | California | 805 |
| 29. | California | 818 |
| 30. | California | 831 |
| 31. | California | 858 |
| 32. | California | 909 |
| 33. | Colorado | 719 |
| 34. | Colorado | 303 |
| 35. | Colorado | 970 |
| 36. | Colorado | 720 |
| 37. | Connecticut | 475 |
| 38. | Connecticut | 203 |
| 39. | Connecticut | 860 |
| 40. | Connecticut | 959 |