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 |
|---|---|---|---|---|---|---|
| 2010-03-18 | 450-576 | not yet reported which blocks → | TELUS Quebec | 2243 | Lavaltrie | — |
| 2010-03-18 | 450-925 | not yet reported which blocks → | TELUS Quebec | 2243 | Varennes | — |
| 2010-02-18 | 450-673 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Lambert | — |
| 2010-02-18 | 450-697 | not yet reported which blocks → | TELUS Quebec | 2243 | Pont-Viau | — |
| 2009-08-25 | 450-307 | not yet reported which blocks → | TELUS Quebec | 2243 | Mirabel-Aeroport | — |
| 2008-02-29 | 450-643 | not yet reported which blocks → | TELUS Quebec | 2243 | Shawbridge | — |
| 2008-02-29 | 450-644 | not yet reported which blocks → | TELUS Quebec | 2243 | Morin Heights | — |
| 2008-02-26 | 450-488 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Thomas-d'Aquin | — |
| 2008-02-21 | 450-344 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Damase | — |
| 2008-02-21 | 450-388 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Pie | — |
| 2008-02-05 | 450-355 | not yet reported which blocks → | TELUS Quebec | 2243 | Ste-Madeleine | — |
| 2008-02-05 | 450-366 | not yet reported which blocks → | TELUS Quebec | 2243 | Actonvale | — |
| 2007-10-11 | 450-749 | not yet reported which blocks → | TELUS Quebec | 2243 | L'Epiphanie-l'Assomption | — |
| 2006-11-14 | 450-762 | not yet reported which blocks → | TELUS Quebec | 2243 | Granby | — |
| 2006-08-09 | 450-710 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Jerome | — |
| 2006-05-19 | 450-744 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Sauveur | — |
| 2006-05-19 | 450-745 | not yet reported which blocks → | TELUS Quebec | 2243 | Ste-Adele | — |
| 2006-04-21 | 450-765 | not yet reported which blocks → | TELUS Quebec | 2243 | Terrebonne | — |
| 2006-04-21 | 450-769 | not yet reported which blocks → | TELUS Quebec | 2243 | Mascouche | — |
| 2006-03-01 | 450-747 | not yet reported which blocks → | TELUS Quebec | 2243 | Valleyfield | — |
| 2004-12-22 | 450-727 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Vincent-de-Paul | — |
| 2004-12-22 | 450-767 | not yet reported which blocks → | TELUS Quebec | 2243 | Ste-Rose | — |
| 2004-05-12 | 450-580 | not yet reported which blocks → | TELUS Quebec | 2243 | Le Gardeur | — |
| 2004-05-12 | 450-970 | not yet reported which blocks → | TELUS Quebec | 2243 | Ste-Therese | — |
| 2003-06-20 | 450-768 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Hyacinthe | — |
| 2003-04-01 | 450-650 | not yet reported which blocks → | TELUS Quebec | 2243 | Boucherville | — |
| 2002-04-05 | 450-640 | not yet reported which blocks → | TELUS Quebec | 2243 | Longueuil | — |
| 2001-07-09 | 450-766 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Lambert | — |
| 2001-01-26 | 450-781 | not yet reported which blocks → | TELUS Quebec | 2243 | Chomedey | — |
| 2001-01-26 | 450-786 | not yet reported which blocks → | TELUS Quebec | 2243 | Pont-Viau | — |
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.