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
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Dec 2025
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2010-09-10 | 581-333 | not yet reported which blocks → | Iristel Inc. | 154E | Thetford Mines | — |
| 2010-09-07 | 581-247 | not yet reported which blocks → | TELUS Quebec | 2243 | Charny | — |
| 2010-09-07 | 581-248 | not yet reported which blocks → | TELUS Quebec | 2243 | Chicoutimi | — |
| 2010-09-07 | 581-249 | not yet reported which blocks → | TELUS Quebec | 2243 | Jonquiere | — |
| 2010-09-07 | 581-250 | not yet reported which blocks → | TELUS Quebec | 2243 | Levis | — |
| 2010-09-07 | 581-251 | not yet reported which blocks → | TELUS Quebec | 2243 | Loretteville | — |
| 2010-09-07 | 581-252 | not yet reported which blocks → | TELUS Quebec | 2243 | Riviere-du-Loup | — |
| 2010-09-07 | 581-253 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Nicolas | — |
| 2010-09-07 | 581-254 | not yet reported which blocks → | TELUS Quebec | 2243 | Thetford Mines | — |
| 2010-07-29 | 581-640 | not yet reported which blocks → | Videotron Ltd. | 8306 | Petite-Riviere-St-Francois | — |
| 2010-07-29 | 581-641 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Urbain | — |
| 2010-07-26 | 581-233 | not yet reported which blocks → | TELUS Mobility | 8303 | New Carlisle | — |
| 2010-06-16 | 581-997 | not yet reported which blocks → | TELUS Mobility | 8303 | Quebec | — |
| 2010-06-08 | 581-306 | not yet reported which blocks → | Bell Mobility | 6574 | Chicoutimi | — |
| 2010-06-08 | 581-307 | not yet reported which blocks → | Bell Mobility | 6574 | Quebec | — |
| 2010-05-19 | 581-339 | not yet reported which blocks → | Bell Canada | 984C | Sept-Iles | — |
| 2010-05-19 | 581-343 | not yet reported which blocks → | Bell Canada | 984C | Donnacona | — |
| 2010-05-19 | 581-346 | not yet reported which blocks → | Bell Canada | 984C | New Richmond | — |
| 2010-05-19 | 581-348 | not yet reported which blocks → | Bell Canada | 984C | Gaspe | — |
| 2010-05-19 | 581-350 | not yet reported which blocks → | Bell Canada | 984C | Saint-Henri-de-Levis | — |
| 2010-04-26 | 581-261 | not yet reported which blocks → | Bell Canada | 984C | Matane | — |
| 2010-04-26 | 581-262 | not yet reported which blocks → | Bell Canada | 984C | Montmagny | — |
| 2010-03-26 | 581-456 | not yet reported which blocks → | Videotron Ltd. | 8306 | Rimouski | — |
| 2010-03-11 | 581-374 | not yet reported which blocks → | Videotron Ltd. | 8306 | Saint-Joseph-de-Beauce | — |
| 2010-02-18 | 581-375 | not yet reported which blocks → | Videotron Ltd. | 8306 | Sainte-Marie-de-Beauce | — |
| 2010-02-02 | 581-740 | not yet reported which blocks → | Videotron Ltd. | 8306 | Donnacona | — |
| 2009-12-23 | 581-400 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Quebec | — |
| 2009-12-23 | 581-401 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Quebec | — |
| 2009-12-17 | 581-225 | not yet reported which blocks → | Videotron Ltd. | 8306 | Vallee-Jonction | — |
| 2009-12-17 | 581-226 | not yet reported which blocks → | Videotron Ltd. | 8306 | Saint-Joseph-de-Beauce | — |
| 2009-12-03 | 581-656 | not yet reported which blocks → | Videotron Ltd. | 8306 | Riviere-Bleue | — |
| 2009-11-26 | 581-421 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Eleuthere | — |
| 2009-10-27 | 581-234 | not yet reported which blocks → | TELUS Mobility | 8303 | Chicoutimi | — |
| 2009-10-27 | 581-246 | not yet reported which blocks → | TELUS Mobility | 8303 | Rimouski | — |
| 2009-10-21 | 581-981 | not yet reported which blocks → | Videotron Ltd. | 8306 | Quebec | — |
| 2009-09-29 | 581-649 | not yet reported which blocks → | Videotron Ltd. | 8306 | Saint-Georges-de-Beauce | — |
| 2009-06-30 | 581-998 | not yet reported which blocks → | TELUS Mobility | 8303 | Quebec | — |
| 2009-05-04 | 581-580 | not yet reported which blocks → | TELUS Mobility | 8303 | Quebec | — |
| 2009-04-21 | 581-224 | not yet reported which blocks → | Videotron Ltd. | 8306 | Sainte-Marie-de-Beauce | — |
| 2008-12-19 | 581-884 | not yet reported which blocks → | TELUS Mobility | 8303 | Matapedia | — |
| 2008-12-19 | 581-885 | not yet reported which blocks → | TELUS Mobility | 8303 | Saint-Roch-des-Aulnaies | — |
| 2008-09-19 | 581-274 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Batiscan | — |
| 2008-09-19 | 581-275 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Lac-aux-Sables | — |
| 2008-09-19 | 581-276 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Saint-Casimir | — |
| 2008-09-19 | 581-277 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Saint-Marc-des-Carrieres | — |
| 2008-09-19 | 581-278 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Saint-Stanislas | — |
| 2008-09-19 | 581-279 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Saint-Tite | — |
| 2008-09-19 | 581-280 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Saint-Ubalde | — |
| 2008-09-19 | 581-281 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Saint-Adelphe | — |
| 2008-09-19 | 581-282 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Sainte-Anne-de-la-Perade | — |
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.