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 |
|---|---|---|---|---|---|---|
| 2017-07-17 | 450-367 | not yet reported which blocks → | Iristel Inc. | 154E | Laval-Est | — |
| 2017-07-17 | 450-879 | not yet reported which blocks → | Iristel Inc. | 154E | Laval-Ouest | — |
| 2012-06-01 | 450-485 | not yet reported which blocks → | Iristel Inc. | 154E | St-Eustache | — |
| 2012-03-20 | 450-497 | not yet reported which blocks → | Iristel Inc. | 154E | Chomedey | — |
| 2012-03-19 | 450-489 | not yet reported which blocks → | Iristel Inc. | 154E | Chambly | — |
| 2012-02-24 | 450-634 | not yet reported which blocks → | Iristel Inc. | 154E | Laval-Ouest | — |
| 2012-02-24 | 450-639 | not yet reported which blocks → | Iristel Inc. | 154E | Laval-Est | — |
| 2011-12-21 | 450-912 | not yet reported which blocks → | Iristel Inc. | 154E | Longueuil | — |
| 2010-09-10 | 450-390 | not yet reported which blocks → | Iristel Inc. | 154E | St-Jean | — |
| 2010-09-10 | 450-914 | not yet reported which blocks → | Iristel Inc. | 154E | Terrebonne | — |
| 2010-09-10 | 450-915 | not yet reported which blocks → | Iristel Inc. | 154E | Granby | — |
| 2010-09-10 | 450-924 | not yet reported which blocks → | Iristel Inc. | 154E | St-Hyacinthe | — |
| 2010-09-10 | 450-954 | not yet reported which blocks → | Iristel Inc. | 154E | Sorel | — |
| 2010-09-10 | 450-977 | not yet reported which blocks → | Iristel Inc. | 154E | Chateauguay | — |
| 2010-09-10 | 450-987 | not yet reported which blocks → | Iristel Inc. | 154E | Ste-Therese | — |
| 2010-09-10 | 450-990 | not yet reported which blocks → | Iristel Inc. | 154E | St-Jerome | — |
| 2009-03-03 | 450-499 | not yet reported which blocks → | Iristel Inc. | 154E | Joliette | — |
| 2008-11-21 | 450-231 | not yet reported which blocks → | Iristel Inc. | 154E | Chomedey | — |
| 2008-11-21 | 450-232 | not yet reported which blocks → | Iristel Inc. | 154E | Laval-Est | — |
| 2008-11-21 | 450-233 | not yet reported which blocks → | Iristel Inc. | 154E | Laval-Ouest | — |
| 2008-11-21 | 450-234 | not yet reported which blocks → | Iristel Inc. | 154E | Ste-Rose | — |
| 2008-11-21 | 450-235 | not yet reported which blocks → | Iristel Inc. | 154E | St-Vincent-de-Paul | — |
| 2008-11-21 | 450-328 | not yet reported which blocks → | Iristel Inc. | 154E | Pont-Viau | — |
| 2008-09-15 | 450-600 | not yet reported which blocks → | Iristel Inc. | 154E | Beloeil | — |
| 2008-09-15 | 450-700 | not yet reported which blocks → | Iristel Inc. | 154E | Chambly | — |
| 2008-09-15 | 450-800 | not yet reported which blocks → | Iristel Inc. | 154E | Laprairie | — |
| 2008-09-15 | 450-804 | not yet reported which blocks → | Iristel Inc. | 154E | Ste-Julie-de-Vercheres | — |
| 2008-09-15 | 450-805 | not yet reported which blocks → | Iristel Inc. | 154E | St-Marc | — |
| 2008-09-15 | 450-809 | not yet reported which blocks → | Iristel Inc. | 154E | Varennes | — |
| 2008-09-15 | 450-823 | not yet reported which blocks → | Iristel Inc. | 154E | Vercheres | — |
| 2008-09-15 | 450-900 | not yet reported which blocks → | Iristel Inc. | 154E | Marieville | — |
| 2008-09-11 | 450-300 | not yet reported which blocks → | Iristel Inc. | 154E | Boucherville | — |
| 2008-09-11 | 450-400 | not yet reported which blocks → | Iristel Inc. | 154E | St-Bruno | — |
| 2008-09-11 | 450-500 | not yet reported which blocks → | Iristel Inc. | 154E | St-Lambert | — |
| 2007-10-23 | 450-999 | not yet reported which blocks → | Iristel Inc. | 154E | Longueuil | — |
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.