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.
Most active assignees, all time — NPA 581
New assignments by month
Sep 2026
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2018-11-08 | 581-449 | not yet reported which blocks → | Videotron Ltd. | 8306 | Saint-Come | — |
| 2018-11-07 | 581-626 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Gedeon | — |
| 2018-11-07 | 581-848 | not yet reported which blocks → | TELUS Quebec | 2243 | Normandin | — |
| 2018-11-07 | 581-865 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Prime | — |
| 2018-11-06 | 581-819 | not yet reported which blocks → | TELUS Quebec | 2243 | Albanel | — |
| 2018-11-06 | 581-841 | not yet reported which blocks → | TELUS Quebec | 2243 | Chambord | — |
| 2018-11-06 | 581-842 | not yet reported which blocks → | TELUS Quebec | 2243 | Delisle | — |
| 2018-11-06 | 581-843 | not yet reported which blocks → | TELUS Quebec | 2243 | Desbiens | — |
| 2018-11-06 | 581-844 | not yet reported which blocks → | TELUS Quebec | 2243 | Hebertville | — |
| 2018-11-06 | 581-845 | not yet reported which blocks → | TELUS Quebec | 2243 | Hebertville-Station | — |
| 2018-11-06 | 581-846 | not yet reported which blocks → | TELUS Quebec | 2243 | Lac Bouchette | — |
| 2018-11-06 | 581-847 | not yet reported which blocks → | TELUS Quebec | 2243 | Metabetchouan | — |
| 2018-11-05 | 581-451 | not yet reported which blocks → | Videotron Ltd. | 8306 | Sainte-Marie-de-Beauce | — |
| 2018-11-05 | 581-452 | not yet reported which blocks → | Videotron Ltd. | 8306 | Saint-Georges-de-Beauce | — |
| 2018-10-29 | 581-849 | not yet reported which blocks → | Videotron Ltd. | 328F | Quebec | — |
| 2018-10-11 | 581-398 | not yet reported which blocks → | Bell Mobility | 6574 | Quebec | — |
| 2018-10-01 | 581-862 | not yet reported which blocks → | Videotron Ltd. | 8306 | Baie-Comeau (Hauterive) | — |
| 2018-09-25 | 581-860 | not yet reported which blocks → | Videotron Ltd. | 8306 | Saint-Bernard-de-Dorchester | — |
| 2018-09-25 | 581-861 | not yet reported which blocks → | Videotron Ltd. | 8306 | Saint-Patrice-de-Beaurivage | — |
| 2018-09-24 | 581-859 | not yet reported which blocks → | Videotron Ltd. | 8306 | Vallee-Jonction | — |
| 2018-09-20 | 581-856 | not yet reported which blocks → | Videotron Ltd. | 8306 | Sainte-Agathe-de-Lotbiniere | — |
| 2018-09-20 | 581-857 | not yet reported which blocks → | Videotron Ltd. | 8306 | Frampton | — |
| 2018-09-20 | 581-858 | not yet reported which blocks → | Videotron Ltd. | 8306 | Saint-Joseph-de-Beauce | — |
| 2018-09-12 | 581-889 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Quebec | — |
| 2018-09-12 | 581-899 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Quebec | — |
| 2018-09-10 | 581-855 | not yet reported which blocks → | Videotron Ltd. | 8306 | Montmagny | — |
| 2018-09-06 | 581-854 | not yet reported which blocks → | Videotron Ltd. | 8306 | Thetford Mines | — |
| 2018-09-05 | 581-412 | not yet reported which blocks → | Telebec Ltee. | 8239 | Chateau-Richer | — |
| 2018-09-05 | 581-556 | not yet reported which blocks → | Telebec Ltee. | 8239 | Disraeli | — |
| 2018-08-24 | 581-851 | not yet reported which blocks → | Videotron Ltd. | 8306 | Alma | — |
| 2018-08-24 | 581-852 | not yet reported which blocks → | Videotron Ltd. | 8306 | Beauceville | — |
| 2018-08-24 | 581-853 | not yet reported which blocks → | Videotron Ltd. | 8306 | Lac-aux-Sables | — |
| 2018-08-17 | 581-850 | not yet reported which blocks → | Videotron Ltd. | 8306 | La Malbaie | — |
| 2018-08-16 | 581-660 | not yet reported which blocks → | Videotron Ltd. | 8306 | Rimouski | — |
| 2018-08-02 | 581-419 | not yet reported which blocks → | Videotron Ltd. | 8306 | Donnacona | — |
| 2018-07-23 | 581-558 | not yet reported which blocks → | Videotron Ltd. | 8306 | Sainte-Thecle | — |
| 2018-07-17 | 581-796 | not yet reported which blocks → | Iristel Inc. | 154E | Natashquan | — |
| 2018-07-17 | 581-809 | not yet reported which blocks → | Iristel Inc. | 154E | Port-Cartier | — |
| 2018-07-13 | 581-480 | not yet reported which blocks → | Iristel Inc. | 154E | Sainte-Anne-des-Monts | — |
| 2018-07-13 | 581-517 | not yet reported which blocks → | Iristel Inc. | 154E | Baie-Trinite | — |
| 2018-07-13 | 581-518 | not yet reported which blocks → | Iristel Inc. | 154E | Amqui | — |
| 2018-07-13 | 581-519 | not yet reported which blocks → | Iristel Inc. | 154E | Mont-Louis | — |
| 2018-07-13 | 581-797 | not yet reported which blocks → | Iristel Inc. | 154E | Havre-Saint-Pierre | — |
| 2018-07-13 | 581-798 | not yet reported which blocks → | Iristel Inc. | 154E | Mont-Joli | — |
| 2018-07-13 | 581-799 | not yet reported which blocks → | Iristel Inc. | 154E | Saint-Fabien | — |
| 2018-07-12 | 581-515 | not yet reported which blocks → | Iristel Inc. | 154E | Port-Daniel | — |
| 2018-07-12 | 581-516 | not yet reported which blocks → | Iristel Inc. | 154E | Forestville | — |
| 2018-07-12 | 581-877 | not yet reported which blocks → | Iristel Inc. | 154E | Grande-Vallee | — |
| 2018-07-12 | 581-878 | not yet reported which blocks → | Iristel Inc. | 154E | Perce | — |
| 2018-07-12 | 581-879 | not yet reported which blocks → | Iristel Inc. | 154E | Chandler | — |
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.