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 |
|---|---|---|---|---|---|---|
| 2026-02-27 | 742-250 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | Newmarket | — |
| 2026-02-27 | 742-260 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | Oshawa | — |
| 2026-02-27 | 742-280 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | Markham | — |
| 2025-05-28 | 742-226 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | Cayuga | — |
| 2025-05-27 | 742-227 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | Malton | — |
| 2025-05-27 | 742-228 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | Thornhill | — |
| 2025-05-27 | 742-229 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | Ajax-Pickering | — |
| 2025-02-12 | 742-461 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | Georgetown | — |
| 2024-12-27 | 742-219 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | St. Catharines-Thorold | — |
| 2024-12-27 | 742-450 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | Cobourg | — |
| 2024-12-20 | 742-218 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | Hamilton | — |
| 2024-03-05 | 742-401 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | Burlington | — |
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.