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 |
|---|---|---|---|---|---|---|
| 2016-02-10 | 579-639 | not yet reported which blocks → | Videotron Ltd. | 8306 | Mascouche | — |
| 2016-02-08 | 579-791 | not yet reported which blocks → | Iristel Inc. | 154E | Lachute | — |
| 2016-02-08 | 579-792 | not yet reported which blocks → | Iristel Inc. | 154E | Lanoraie | — |
| 2016-01-28 | 579-377 | not yet reported which blocks → | Fibernetics Corporation | 464D | Joliette | — |
| 2016-01-28 | 579-378 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ste-Therese | — |
| 2016-01-13 | 579-796 | not yet reported which blocks → | Iristel Inc. | 154E | L'Epiphanie-l'Assomption | — |
| 2016-01-07 | 579-365 | not yet reported which blocks → | Videotron Ltd. | 8306 | Granby | — |
| 2015-12-22 | 579-638 | not yet reported which blocks → | Videotron Ltd. | 8306 | Vaudreuil | — |
| 2015-11-25 | 579-364 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Jean-de-Matha | — |
| 2015-11-17 | 579-476 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Sauveur | — |
| 2015-11-10 | 579-380 | not yet reported which blocks → | Fibernetics Corporation | 464D | Granby | — |
| 2015-11-10 | 579-381 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Jean | — |
| 2015-11-09 | 579-363 | not yet reported which blocks → | Videotron Ltd. | 8306 | Sorel | — |
| 2015-11-09 | 579-637 | not yet reported which blocks → | Videotron Ltd. | 8306 | Ste-Therese | — |
| 2015-10-13 | 579-636 | not yet reported which blocks → | Videotron Ltd. | 8306 | Joliette | — |
| 2015-10-13 | 579-920 | not yet reported which blocks → | Comwave Networks | 160G | Valleyfield | — |
| 2015-10-07 | 579-492 | not yet reported which blocks → | TELUS Mobility | 8303 | Sorel | — |
| 2015-09-28 | 579-790 | not yet reported which blocks → | Iristel Inc. | 154E | Valleyfield | — |
| 2015-09-25 | 579-887 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Jerome | — |
| 2015-09-18 | 579-362 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Jean | — |
| 2015-09-08 | 579-635 | not yet reported which blocks → | Videotron Ltd. | 8306 | Le Gardeur | — |
| 2015-08-28 | 579-634 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Jerome | — |
| 2015-08-18 | 579-441 | not yet reported which blocks → | Videotron Ltd. | 8306 | Mansonville | — |
| 2015-08-17 | 579-633 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Eustache | — |
| 2015-08-12 | 579-361 | not yet reported which blocks → | Videotron Ltd. | 328F | Granby | — |
| 2015-07-30 | 579-723 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Lambert | — |
| 2015-07-28 | 579-660 | not yet reported which blocks → | InnSysVoice Corp | 383H | Laval-Est | — |
| 2015-07-28 | 579-661 | not yet reported which blocks → | InnSysVoice Corp | 383H | Laval-Ouest | — |
| 2015-07-28 | 579-666 | not yet reported which blocks → | InnSysVoice Corp | 383H | Chomedey | — |
| 2015-07-27 | 579-662 | not yet reported which blocks → | InnSysVoice Corp | 383H | Pont-Viau | — |
| 2015-07-27 | 579-663 | not yet reported which blocks → | InnSysVoice Corp | 383H | Ste-Rose | — |
| 2015-07-27 | 579-664 | not yet reported which blocks → | InnSysVoice Corp | 383H | St-Vincent-de-Paul | — |
| 2015-07-15 | 579-210 | not yet reported which blocks → | TELUS Quebec | 2243 | Vercheres | — |
| 2015-07-07 | 579-359 | not yet reported which blocks → | Videotron Ltd. | 8306 | Lanoraie | — |
| 2015-06-29 | 579-212 | not yet reported which blocks → | TELUS Quebec | 2243 | Cowansville | — |
| 2015-06-29 | 579-213 | not yet reported which blocks → | TELUS Quebec | 2243 | Granby | — |
| 2015-06-29 | 579-256 | not yet reported which blocks → | TELUS Quebec | 2243 | Bromont | — |
| 2015-06-24 | 579-525 | not yet reported which blocks → | Bell Mobility | 6574 | St-Jerome | — |
| 2015-06-24 | 579-766 | not yet reported which blocks → | TELUS Mobility | 8303 | Joliette | — |
| 2015-06-15 | 579-632 | not yet reported which blocks → | Videotron Ltd. | 8306 | Lachute | — |
| 2015-06-15 | 579-795 | not yet reported which blocks → | Iristel Inc. | 154E | L'Epiphanie-l'Assomption | — |
| 2015-06-15 | 579-995 | not yet reported which blocks → | Iristel Inc. | 154E | St-Sauveur | — |
| 2015-06-12 | 579-254 | not yet reported which blocks → | TELUS Quebec | 2243 | Mirabel-Aeroport | — |
| 2015-06-11 | 579-353 | not yet reported which blocks → | Bell Mobility | 6574 | Valleyfield | — |
| 2015-06-09 | 579-255 | not yet reported which blocks → | Bell Mobility | 6574 | Granby | — |
| 2015-06-09 | 579-269 | not yet reported which blocks → | Comwave Networks | 160G | Sorel | — |
| 2015-05-06 | 579-280 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Constant | — |
| 2015-05-06 | 579-360 | not yet reported which blocks → | Videotron Ltd. | 8306 | Contrecoeur | — |
| 2015-05-06 | 579-370 | not yet reported which blocks → | Videotron Ltd. | 8306 | Notre-Dame-de-Stanbridge | — |
| 2015-05-06 | 579-930 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Pie | — |
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.