NumberResearchRecent prefix assignments
1 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.
Most active assignees, last 30 days — NPA 579
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2021-11-16 | 579-590 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Ste-Rose | — |
| 2021-11-16 | 579-599 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Laval-Est | — |
| 2021-11-16 | 579-699 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Laval-Ouest | — |
| 2021-11-15 | 579-510 | not yet reported which blocks → | IXICA Communications Inc. | 812H | St-Cesaire | — |
| 2021-11-15 | 579-707 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Frelighsburg | — |
| 2021-11-15 | 579-710 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Knowlton | — |
| 2021-11-15 | 579-744 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Eastman | — |
| 2021-11-15 | 579-750 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Bromont | — |
| 2021-11-15 | 579-755 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Dunham | — |
| 2021-11-15 | 579-770 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Cowansville | — |
| 2021-11-15 | 579-777 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Granby | — |
| 2021-11-15 | 579-780 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Mansonville | — |
| 2021-11-12 | 579-520 | not yet reported which blocks → | IXICA Communications Inc. | 812H | St-Paul-D'Abbotsford | — |
| 2021-11-12 | 579-560 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Sutton | — |
| 2021-11-12 | 579-580 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Waterloo | — |
| 2021-10-19 | 579-356 | not yet reported which blocks → | 9164-3122 Quebec inc | 843D | Ste-Victoire | — |
| 2021-10-18 | 579-548 | not yet reported which blocks → | Cooptel | 818D | Sorel | — |
| 2021-10-14 | 579-483 | not yet reported which blocks → | TELUS Mobility | 8303 | Bedford | — |
| 2021-10-13 | 579-484 | not yet reported which blocks → | TELUS Mobility | 8303 | St-Hyacinthe | — |
| 2021-10-12 | 579-985 | not yet reported which blocks → | TELUS Mobility | 8303 | St-Jean | — |
| 2021-10-01 | 579-540 | not yet reported which blocks → | Cooptel | 818D | Ste-Victoire | — |
| 2021-10-01 | 579-541 | not yet reported which blocks → | Cooptel | 818D | St-Ours | — |
| 2021-10-01 | 579-543 | not yet reported which blocks → | Cooptel | 818D | St-Pie | — |
| 2021-10-01 | 579-544 | not yet reported which blocks → | Cooptel | 818D | St-Damase | — |
| 2021-10-01 | 579-545 | not yet reported which blocks → | Cooptel | 818D | Ste-Madeleine | — |
| 2021-10-01 | 579-546 | not yet reported which blocks → | Cooptel | 818D | St-Thomas-d'Aquin | — |
| 2021-10-01 | 579-547 | not yet reported which blocks → | Cooptel | 818D | St-Zephirin | — |
| 2021-09-30 | 579-467 | not yet reported which blocks → | Fibernetics Corporation | 464D | Mascouche | — |
| 2021-09-30 | 579-468 | not yet reported which blocks → | Fibernetics Corporation | 464D | Terrebonne | — |
| 2021-09-09 | 579-893 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Hyacinthe | — |
| 2021-09-09 | 579-894 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Damase | — |
| 2021-09-09 | 579-895 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ste-Madeleine | — |
| 2021-09-09 | 579-896 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Pie | — |
| 2021-09-09 | 579-897 | not yet reported which blocks → | Fibernetics Corporation | 464D | Actonvale | — |
| 2021-08-19 | 579-349 | not yet reported which blocks → | Fibernetics Corporation | 464D | Mirabel-St-Augustin | — |
| 2021-08-19 | 579-350 | not yet reported which blocks → | Fibernetics Corporation | 464D | Mirabel-Ste-Scholastique | — |
| 2021-08-19 | 579-351 | not yet reported which blocks → | Fibernetics Corporation | 464D | Oka | — |
| 2021-08-19 | 579-352 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Eustache | — |
| 2021-08-03 | 579-493 | not yet reported which blocks → | Fibernetics Corporation | 464D | Sorel | — |
| 2021-08-03 | 579-494 | not yet reported which blocks → | Fibernetics Corporation | 464D | Pierreville | — |
| 2021-08-03 | 579-495 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Denis | — |
| 2021-08-03 | 579-496 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Pie-de-Guire | — |
| 2021-08-03 | 579-497 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Zephirin | — |
| 2021-08-03 | 579-498 | not yet reported which blocks → | Fibernetics Corporation | 464D | Yamaska | — |
| 2021-08-03 | 579-515 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Chrysostome | — |
| 2021-08-03 | 579-516 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Constant | — |
| 2021-08-03 | 579-517 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Remi | — |
| 2021-08-03 | 579-518 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ste-Martine | — |
| 2021-07-29 | 579-513 | not yet reported which blocks → | Fibernetics Corporation | 464D | Chateauguay | — |
| 2021-07-29 | 579-514 | not yet reported which blocks → | Fibernetics Corporation | 464D | Beauharnois | — |
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.