NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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
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 |
|---|---|---|---|---|---|---|
| 2018-05-17 | 581-463 | not yet reported which blocks → | Bell Canada | 984C | Maria | — |
| 2018-05-17 | 581-488 | not yet reported which blocks → | Bell Canada | 984C | Saint-Simon-de-Rimouski | — |
| 2018-05-17 | 581-493 | not yet reported which blocks → | Bell Canada | 984C | Cloridorme | — |
| 2018-05-17 | 581-494 | not yet reported which blocks → | Bell Canada | 984C | Grande-Riviere | — |
| 2018-05-17 | 581-495 | not yet reported which blocks → | Bell Canada | 984C | Grande-Vallee | — |
| 2018-05-17 | 581-496 | not yet reported which blocks → | Bell Canada | 984C | Murdochville | — |
| 2018-05-17 | 581-497 | not yet reported which blocks → | Bell Canada | 984C | Riviere-au-Renard | — |
| 2018-05-17 | 581-526 | not yet reported which blocks → | Bell Canada | 984C | Saint-Come | — |
| 2018-05-17 | 581-527 | not yet reported which blocks → | Bell Canada | 984C | Saint-Gedeon-de-Beauce | — |
| 2018-05-17 | 581-528 | not yet reported which blocks → | Bell Canada | 984C | Saint-Martin | — |
| 2018-05-17 | 581-529 | not yet reported which blocks → | Bell Canada | 984C | Saint-Prosper-de-Dorchester | — |
| 2018-05-16 | 581-482 | not yet reported which blocks → | Bell Canada | 984C | Bic | — |
| 2018-05-16 | 581-483 | not yet reported which blocks → | Bell Canada | 984C | Les Boules | — |
| 2018-05-16 | 581-484 | not yet reported which blocks → | Bell Canada | 984C | Luceville | — |
| 2018-05-16 | 581-485 | not yet reported which blocks → | Bell Canada | 984C | Mont-Joli | — |
| 2018-05-16 | 581-486 | not yet reported which blocks → | Bell Canada | 984C | Sainte-Blandine | — |
| 2018-05-16 | 581-487 | not yet reported which blocks → | Bell Canada | 984C | Saint-Gabriel | — |
| 2018-05-16 | 581-492 | not yet reported which blocks → | Bell Canada | 984C | Cap-des-Rosiers | — |
| 2018-05-16 | 581-520 | not yet reported which blocks → | Bell Canada | 984C | Cap-Chat | — |
| 2018-05-16 | 581-521 | not yet reported which blocks → | Bell Canada | 984C | Les Mechins | — |
| 2018-05-16 | 581-522 | not yet reported which blocks → | Bell Canada | 984C | Mont-Louis | — |
| 2018-05-16 | 581-523 | not yet reported which blocks → | Bell Canada | 984C | Sainte-Felicite | — |
| 2018-05-16 | 581-524 | not yet reported which blocks → | Bell Canada | 984C | Saint-Ulric | — |
| 2018-05-16 | 581-657 | not yet reported which blocks → | Videotron Ltd. | 8306 | Saint-Casimir | — |
| 2018-05-16 | 581-658 | not yet reported which blocks → | Videotron Ltd. | 8306 | Riviere-a-Pierre | — |
| 2018-05-16 | 581-659 | not yet reported which blocks → | Videotron Ltd. | 8306 | Saint-Adelphe | — |
| 2018-05-09 | 581-960 | not yet reported which blocks → | Distributel | 083E | Boischatel | — |
| 2018-05-09 | 581-961 | not yet reported which blocks → | Distributel | 083E | Loretteville | — |
| 2018-05-09 | 581-962 | not yet reported which blocks → | Distributel | 083E | Notre-Dame-des-Laurentides | — |
| 2018-05-09 | 581-963 | not yet reported which blocks → | Distributel | 083E | St-Fereol | — |
| 2018-05-09 | 581-964 | not yet reported which blocks → | Distributel | 083E | St-Jean-ile-d'Orleans | — |
| 2018-05-09 | 581-965 | not yet reported which blocks → | Distributel | 083E | Ste-Petronille | — |
| 2018-05-09 | 581-966 | not yet reported which blocks → | Distributel | 083E | St-Tite-des-Caps | — |
| 2018-05-09 | 581-967 | not yet reported which blocks → | Distributel | 083E | Ste-Anne-de-Beaupre | — |
| 2018-05-09 | 581-968 | not yet reported which blocks → | Distributel | 083E | Ste-Brigitte-de-Laval | — |
| 2018-05-09 | 581-969 | not yet reported which blocks → | Distributel | 083E | Ste-Catherine | — |
| 2018-05-09 | 581-970 | not yet reported which blocks → | Distributel | 083E | Stoneham | — |
| 2018-05-09 | 581-971 | not yet reported which blocks → | Distributel | 083E | Valcartier | — |
| 2018-04-04 | 581-762 | not yet reported which blocks → | Videotron Ltd. | 8306 | Saint-Henri-de-Levis | — |
| 2018-03-20 | 581-559 | not yet reported which blocks → | Distributel | 083E | Ferland | — |
| 2018-03-20 | 581-564 | not yet reported which blocks → | Distributel | 083E | Jonquiere | — |
| 2018-03-20 | 581-565 | not yet reported which blocks → | Distributel | 083E | La Baie (Chicoutimi Co.) | — |
| 2018-03-20 | 581-566 | not yet reported which blocks → | Distributel | 083E | Laterriere | — |
| 2018-03-20 | 581-567 | not yet reported which blocks → | Distributel | 083E | St-Ambroise-de-Chicoutimi | — |
| 2018-03-20 | 581-568 | not yet reported which blocks → | Distributel | 083E | St-Fulgence | — |
| 2018-03-20 | 581-569 | not yet reported which blocks → | Distributel | 083E | St-Honore (Chicoutimi Co.) | — |
| 2018-03-20 | 581-570 | not yet reported which blocks → | Distributel | 083E | Ste-Rose-du-Nord | — |
| 2018-03-20 | 581-571 | not yet reported which blocks → | Distributel | 083E | Anse-St-Jean | — |
| 2018-03-07 | 581-709 | not yet reported which blocks → | Iristel Inc. | 154E | Quebec | — |
| 2018-02-28 | 581-763 | not yet reported which blocks → | Videotron Ltd. | 8306 | Disraeli | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.