| NPA | Region | Overlay |
|---|---|---|
| 501 | Arkansas | |
| 502 | Kentucky | |
| 503 | Oregon | 503/971 |
| 504 | Louisiana | |
| 505 | New Mexico | |
| 506 | New Brunswick | 428/506 |
| 507 | Minnesota | 507/924 |
| 508 | Massachusetts | 508/774 |
| 509 | Washington | |
| 510 | California | 341/510 |
| 512 | Texas | 512/737 |
| 513 | Ohio | 283/513 |
| 514 | Québec | 263/438/514 |
| 515 | Iowa | |
| 516 | New York | 363/516 |
| 517 | Michigan | |
| 518 | New York | 518/838 |
| 519 | Ontario | 226/382/519/548 |
| 520 | Arizona | |
| 530 | California | 530/837 |
| 531 | Nebraska | 402/531 |
| 534 | Wisconsin | 534/715 |
| 539 | Oklahoma | 539/918 |
| 540 | Virginia | 540/826 |
| 541 | Oregon | 458/541 |
| 548 | Ontario | 226/382/519/548 |
| 551 | New Jersey | 201/551 |
| 557 | Missouri | 314/557 |
| 559 | California | 357/559 |
| 561 | Florida | 561/728 |
| 562 | California | |
| 563 | Iowa | |
| 564 | Washington | 206/360/564 |
| 567 | Ohio | 419/567 |
| 570 | Pennsylvania | 272/570 |
| 571 | Virginia | 571/703 |
| 572 | Oklahoma | 405/572 |
| 573 | Missouri | 235/573 |
| 574 | Indiana | |
| 575 | New Mexico | |
| 579 | Québec | 354/450/579 |
| 580 | Oklahoma | |
| 581 | Québec | 367/418/581 |
| 582 | Pennsylvania | 582/814 |
| 584 | Manitoba | 204/431/584 |
| 585 | New York | |
| 586 | Michigan | |
| 587 | Alberta | 368/403/587/825; 368/587/780/825 |
Last updated: Thu, 16 Oct 2025 03:04:18 UTC
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