NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2018-10-03 | 289-226 | not yet reported which blocks → | Videotron Ltd. | 383F | Grafton | — |
| 2018-09-27 | 289-519 | not yet reported which blocks → | Videotron Ltd. | 383F | Port Hope | — |
| 2014-04-30 | 289-501 | not yet reported which blocks → | Videotron Ltd. | 383F | St. Catharines-Thorold | — |
| 2013-10-07 | 289-707 | not yet reported which blocks → | Videotron Ltd. | 787G | Burlington | — |
| 2012-04-19 | 289-940 | not yet reported which blocks → | Videotron Ltd. | 787G | Oakville | — |
| 2012-04-19 | 289-941 | not yet reported which blocks → | Videotron Ltd. | 787G | Hamilton | — |
| 2012-04-19 | 289-943 | not yet reported which blocks → | Videotron Ltd. | 787G | Oshawa | — |
| 2012-04-05 | 289-946 | not yet reported which blocks → | Videotron Ltd. | 787G | Brampton | — |
| 2012-04-05 | 289-947 | not yet reported which blocks → | Videotron Ltd. | 787G | Richmond Hill | — |
| 2011-02-18 | 289-788 | not yet reported which blocks → | Videotron Ltd. | 383F | Hamilton | — |
| 2010-12-22 | 289-909 | not yet reported which blocks → | Videotron Ltd. | 383F | Newmarket | — |
| 2010-12-22 | 289-994 | not yet reported which blocks → | Videotron Ltd. | 383F | Hamilton | — |
| 2010-03-23 | 289-990 | not yet reported which blocks → | Videotron Ltd. | 383F | St. Catharines-Thorold | — |
| 2009-12-31 | 289-300 | not yet reported which blocks → | Videotron Ltd. | 383F | Oakville | — |
| 2009-12-31 | 289-489 | not yet reported which blocks → | Videotron Ltd. | 383F | Hamilton | — |
| 2009-12-31 | 289-689 | not yet reported which blocks → | Videotron Ltd. | 383F | Hamilton | — |
| 2009-12-31 | 289-991 | not yet reported which blocks → | Videotron Ltd. | 383F | Oshawa | — |
| 2009-12-31 | 289-992 | not yet reported which blocks → | Videotron Ltd. | 383F | Oshawa | — |
| 2009-05-21 | 289-400 | not yet reported which blocks → | Videotron Ltd. | 383F | Oakville | — |
| 2009-05-21 | 289-500 | not yet reported which blocks → | Videotron Ltd. | 383F | Newmarket | — |
| 2009-05-21 | 289-600 | not yet reported which blocks → | Videotron Ltd. | 383F | Oshawa | — |
| 2009-05-15 | 289-700 | not yet reported which blocks → | Videotron Ltd. | 383F | Hamilton | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.