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 |
|---|---|---|---|---|---|---|
| 2017-08-08 | 579-401 | not yet reported which blocks → | Iristel Inc. | 154E | Marieville | — |
| 2017-07-20 | 579-485 | not yet reported which blocks → | Iristel Inc. | 154E | St-Eustache | — |
| 2017-06-08 | 579-375 | not yet reported which blocks → | Videotron Ltd. | 8306 | Venise-en-Quebec | — |
| 2017-06-08 | 579-801 | not yet reported which blocks → | Iristel Inc. | 154E | St-Jean | — |
| 2017-06-02 | 579-991 | not yet reported which blocks → | Iristel Inc. | 154E | St-Jerome | — |
| 2017-06-02 | 579-993 | not yet reported which blocks → | Iristel Inc. | 154E | St-Lin | — |
| 2017-05-29 | 579-501 | not yet reported which blocks → | Iristel Inc. | 154E | Joliette | — |
| 2017-05-26 | 579-994 | not yet reported which blocks → | Iristel Inc. | 154E | Granby | — |
| 2017-05-19 | 579-469 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Eastman | — |
| 2017-04-07 | 579-655 | not yet reported which blocks → | Bell Mobility | 6574 | Lachute | — |
| 2017-04-05 | 579-872 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Boucherville | — |
| 2017-04-05 | 579-876 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Granby | — |
| 2017-04-05 | 579-877 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Valleyfield | — |
| 2017-04-05 | 579-878 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Joliette | — |
| 2017-04-05 | 579-879 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Chomedey | — |
| 2017-03-15 | 579-645 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Michel-des-Saints | — |
| 2017-03-13 | 579-287 | not yet reported which blocks → | TELUS Quebec | 2243 | Berthierville | — |
| 2017-03-13 | 579-289 | not yet reported which blocks → | TELUS Quebec | 2243 | Lavaltrie | — |
| 2017-03-13 | 579-290 | not yet reported which blocks → | TELUS Quebec | 2243 | Rawdon | — |
| 2017-03-13 | 579-291 | not yet reported which blocks → | TELUS Quebec | 2243 | Crabtree | — |
| 2017-03-13 | 579-292 | not yet reported which blocks → | TELUS Quebec | 2243 | Le Gardeur | — |
| 2017-03-13 | 579-293 | not yet reported which blocks → | TELUS Quebec | 2243 | Lanoraie | — |
| 2017-03-13 | 579-294 | not yet reported which blocks → | TELUS Quebec | 2243 | L'Epiphanie-l'Assomption | — |
| 2017-03-13 | 579-374 | not yet reported which blocks → | Videotron Ltd. | 8306 | Pierreville | — |
| 2017-02-23 | 579-286 | not yet reported which blocks → | TELUS Quebec | 2243 | Ste-Marguerite | — |
| 2017-02-08 | 579-618 | not yet reported which blocks → | Bell Canada | 8050 | Chomedey | — |
| 2017-02-08 | 579-619 | not yet reported which blocks → | Bell Canada | 8050 | Ste-Rose | — |
| 2017-02-08 | 579-620 | not yet reported which blocks → | Bell Canada | 8050 | Longueuil | — |
| 2017-02-08 | 579-621 | not yet reported which blocks → | Bell Canada | 8050 | St-Lambert | — |
| 2017-02-02 | 579-373 | not yet reported which blocks → | Videotron Ltd. | 328F | St-Sauveur | — |
| 2017-02-02 | 579-421 | not yet reported which blocks → | Videotron Ltd. | 328F | Longueuil | — |
| 2017-01-31 | 579-369 | not yet reported which blocks → | Videotron Ltd. | 328F | Sorel | — |
| 2017-01-31 | 579-371 | not yet reported which blocks → | Videotron Ltd. | 328F | St-Hyacinthe | — |
| 2017-01-31 | 579-372 | not yet reported which blocks → | Videotron Ltd. | 328F | St-Jean | — |
| 2017-01-31 | 579-420 | not yet reported which blocks → | Videotron Ltd. | 328F | Granby | — |
| 2017-01-31 | 579-961 | not yet reported which blocks → | Videotron Ltd. | 328F | Valleyfield | — |
| 2017-01-26 | 579-368 | not yet reported which blocks → | Videotron Ltd. | 328F | St-Jerome | — |
| 2017-01-26 | 579-960 | not yet reported which blocks → | Videotron Ltd. | 328F | Joliette | — |
| 2017-01-23 | 579-366 | not yet reported which blocks → | Videotron Ltd. | 328F | Lachute | — |
| 2017-01-12 | 579-594 | not yet reported which blocks → | TELUS Mobility | 8303 | Granby | — |
| 2017-01-11 | 579-643 | not yet reported which blocks → | Videotron Ltd. | 8306 | Berthierville | — |
| 2017-01-11 | 579-644 | not yet reported which blocks → | Videotron Ltd. | 8306 | Lanoraie | — |
| 2016-12-20 | 579-642 | not yet reported which blocks → | Videotron Ltd. | 8306 | Mirabel-Aeroport | — |
| 2016-10-24 | 579-200 | not yet reported which blocks → | TELUS Quebec | 2243 | Lachute | — |
| 2016-10-24 | 579-201 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Sauveur | — |
| 2016-10-24 | 579-202 | not yet reported which blocks → | TELUS Quebec | 2243 | Ste-Adele | — |
| 2016-10-24 | 579-203 | not yet reported which blocks → | TELUS Quebec | 2243 | Brownsburg | — |
| 2016-10-06 | 579-609 | not yet reported which blocks → | Bell Canada | 8050 | St-Jean | — |
| 2016-10-06 | 579-612 | not yet reported which blocks → | Bell Canada | 8050 | St-Lambert | — |
| 2016-10-06 | 579-613 | not yet reported which blocks → | Bell Canada | 8050 | Ste-Therese | — |
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.