273 · Eastern Québec, Canada
273 is planned to overlay 367, 418, 581. Existing numbers keep their area codes.
Numbering updates
New and Upcoming Area Codes
New area codes are introduced when a numbering region needs more numbers. These announced overlays will share a region with existing codes. Dates can change, so use the linked administrator notices for the latest plan.
Announced overlays
565 · Georgia, United States
565 is planned to overlay 912. Existing numbers keep their area codes.
Reviewed September 29, 2026. This is a short list of confirmed upcoming geographic overlays, not every proposal or reserved code. Check NANPA’s planned-code report for the current official list.
Recently introduced codes
From the NANPA in-service dataset, dated 2026-09-28.
| Area code | Region | In service since | Overlay codes |
|---|---|---|---|
| 465 | New York | June 18, 2026 | 347, 718, 917, 929 |
| 483 | Alabama | February 23, 2026 | 334 |
| 471 | Mississippi | January 30, 2026 | 662 |
| 679 | Michigan | November 7, 2025 | 313 |
| 457 | Louisiana | September 25, 2025 | 318 |
| 729 | Tennessee | September 5, 2025 | 423 |
| 748 | Colorado | July 7, 2025 | 970 |
| 257 | British Columbia | May 24, 2025 | 236, 250, 604, 672, 778 |
An area code’s introduction date does not mean every number in it was active on that day. NANPA planning letters describe dialing transitions and rollout schedules.