The following Numbering Plan Area (NPA) Relief Activity Schedule is based on planning letters received from the North American Numbering Plan Administrator (NANPA).
NPA Relief Activity Schedule | ||||||
| Old NPA | New NPA |
Affected Area |
Relief Type |
Start of Permissive Dialing |
Mandatory 10-Digit Dialing |
Start Date |
318 |
457 |
Louisiana |
Overlay |
2/24/2025 |
8/25/2025 |
9/25/2025 |
709 |
879 |
Newfoundland & Labrador |
Overlay |
|
|
2/17/2024 |
334 |
483 |
Alabama |
Overlay |
7/23/2025 |
1/23/2026 |
2/23/2026 |
367/418/581 |
273 |
Eastern Quebec |
Overlay |
5/27/2026 |
11/27/2026 |
2/27/2027 |
Please Note: This schedule is subject to change depending on the capacity of the TFNRegistry™ and notifications from NANPA.
Modifications to this schedule have been highlighted in red.
Recently Completed NPA Relief Activities:
New York NPA 465 to overlay 347/718/917/929
Michigan NPA 679 to overlay 318
Colorado NPA 748 to overlay 970
Washington NPA 564 to overlay 206
British Columbia NPA 257 to overlay 236/250/604/672/778
Ontario NPA 942 to overlay 416/437/647
California NPA 357 to overlay 559
Tennessee NPA 729 to overlay 423
California NPA 837 to overlay 530
California NPA 738 to overlay 213/323
Mississippi NPA 471 to overlay 662