NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2024-01-04 | 365-963 | not yet reported which blocks → | Videotron Ltd. | 787G | Brampton | — |
| 2023-09-29 | 365-293 | not yet reported which blocks → | Videotron Ltd. | 328F | Brampton | — |
| 2023-09-29 | 365-386 | not yet reported which blocks → | Videotron Ltd. | 328F | Newmarket | — |
| 2023-09-07 | 365-351 | not yet reported which blocks → | Videotron Ltd. | 328F | Oakville | — |
| 2023-06-16 | 365-359 | not yet reported which blocks → | Videotron Ltd. | 328F | St. Catharines-Thorold | — |
| 2023-06-14 | 365-357 | not yet reported which blocks → | Videotron Ltd. | 328F | Hamilton | — |
| 2023-06-14 | 365-358 | not yet reported which blocks → | Videotron Ltd. | 328F | Oshawa | — |
| 2022-10-12 | 365-356 | not yet reported which blocks → | Videotron Ltd. | 787G | Hamilton | — |
| 2022-10-12 | 365-499 | not yet reported which blocks → | Videotron Ltd. | 787G | Oshawa | — |
| 2022-10-04 | 365-524 | not yet reported which blocks → | Videotron Ltd. | 787G | St. Catharines-Thorold | — |
| 2021-02-22 | 365-737 | not yet reported which blocks → | Videotron Ltd. | 787G | Burlington | — |
| 2021-02-22 | 365-738 | not yet reported which blocks → | Videotron Ltd. | 383F | Newmarket | — |
| 2021-02-22 | 365-739 | not yet reported which blocks → | Videotron Ltd. | 787G | Oakville | — |
| 2020-01-20 | 365-476 | not yet reported which blocks → | Videotron Ltd. | 787G | Hamilton | — |
| 2018-08-29 | 365-724 | not yet reported which blocks → | Videotron Ltd. | 383F | Cobourg | — |
| 2016-02-16 | 365-880 | not yet reported which blocks → | Videotron Ltd. | 787G | St. Catharines-Thorold | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.