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
Aug 2026
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May 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 |
|---|---|---|---|---|---|---|
| 2013-07-19 | 581-629 | not yet reported which blocks → | TELUS Quebec | 2243 | Levis | — |
| 2013-07-17 | 581-829 | not yet reported which blocks → | TELUS Quebec | 8083 | Baie-Comeau (Hauterive) | — |
| 2013-07-17 | 581-831 | not yet reported which blocks → | TELUS Quebec | 8083 | Saint-Georges-de-Beauce | — |
| 2013-07-11 | 581-827 | not yet reported which blocks → | TELUS Quebec | 8083 | Bonaventure | — |
| 2013-07-11 | 581-830 | not yet reported which blocks → | TELUS Quebec | 8083 | Sept-Iles | — |
| 2013-07-11 | 581-832 | not yet reported which blocks → | TELUS Quebec | 8083 | Gaspe | — |
| 2013-07-05 | 581-828 | not yet reported which blocks → | TELUS Quebec | 2243 | Alma | — |
| 2013-06-14 | 581-720 | not yet reported which blocks → | TELUS Quebec | 8083 | Rimouski | — |
| 2013-06-12 | 581-420 | not yet reported which blocks → | Videotron Ltd. | 8306 | Beauceville | — |
| 2013-06-07 | 581-927 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Quebec | — |
| 2013-06-07 | 581-928 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Quebec | — |
| 2013-04-26 | 581-821 | not yet reported which blocks → | TELUS Quebec | 8083 | Donnacona | — |
| 2013-04-26 | 581-822 | not yet reported which blocks → | TELUS Quebec | 8083 | Gaspe | — |
| 2013-04-26 | 581-823 | not yet reported which blocks → | TELUS Quebec | 8083 | Baie-Comeau (Hauterive) | — |
| 2013-04-26 | 581-824 | not yet reported which blocks → | TELUS Quebec | 8083 | Rimouski | — |
| 2013-04-26 | 581-825 | not yet reported which blocks → | TELUS Quebec | 8083 | Saint-Georges-de-Beauce | — |
| 2013-04-26 | 581-826 | not yet reported which blocks → | TELUS Quebec | 8083 | Sept-Iles | — |
| 2013-04-19 | 581-372 | not yet reported which blocks → | Bell Mobility | 6574 | Saint-Georges-de-Beauce | — |
| 2013-04-18 | 581-445 | not yet reported which blocks → | Bell Mobility | 6574 | Chibougamau | — |
| 2013-04-16 | 581-814 | not yet reported which blocks → | TELUS Quebec | 2243 | Quebec | — |
| 2013-03-28 | 581-430 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Chibougamau | — |
| 2013-03-05 | 581-305 | not yet reported which blocks → | Bell Mobility | 6574 | Quebec | — |
| 2013-03-05 | 581-531 | not yet reported which blocks → | Comwave Networks | 160G | Quebec | — |
| 2013-02-08 | 581-985 | not yet reported which blocks → | Videotron Ltd. | 328F | Quebec | — |
| 2013-01-09 | 581-648 | not yet reported which blocks → | Videotron Ltd. | 8306 | L'Ile-Verte | — |
| 2013-01-07 | 581-781 | not yet reported which blocks → | Fibernetics Corporation | 464D | Quebec | — |
| 2012-12-14 | 581-271 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Leeds | — |
| 2012-12-14 | 581-272 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Inverness | — |
| 2012-12-14 | 581-330 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Garthby | — |
| 2012-12-14 | 581-331 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | East Broughton | — |
| 2012-12-13 | 581-266 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Black Lake | — |
| 2012-12-13 | 581-267 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Tring Jonction | — |
| 2012-12-13 | 581-268 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Thetford Mines | — |
| 2012-12-13 | 581-269 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Stratford | — |
| 2012-12-13 | 581-270 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | St-Ferdinand-D'Halifax | — |
| 2012-11-23 | 581-813 | not yet reported which blocks → | TELUS Quebec | 2243 | Beauceville | — |
| 2012-11-12 | 581-422 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Sainte-Agathe-de-Lotbiniere | — |
| 2012-11-12 | 581-423 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Sainte-Henedine | — |
| 2012-11-12 | 581-424 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Sainte-Marie-de-Beauce | — |
| 2012-11-12 | 581-425 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Vallee-Jonction | — |
| 2012-11-12 | 581-426 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Frampton | — |
| 2012-11-12 | 581-427 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Saint-Bernard-de-Dorchester | — |
| 2012-11-12 | 581-428 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Saint-Joseph-de-Beauce | — |
| 2012-11-12 | 581-429 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Saint-Patrice-de-Beaurivage | — |
| 2012-11-02 | 581-622 | not yet reported which blocks → | TELUS Mobility | 8303 | Natashquan | — |
| 2012-11-02 | 581-682 | not yet reported which blocks → | Fibernetics Corporation | 464D | La Baie (Chicoutimi Co.) | — |
| 2012-11-02 | 581-683 | not yet reported which blocks → | Fibernetics Corporation | 464D | Chicoutimi | — |
| 2012-11-02 | 581-684 | not yet reported which blocks → | Fibernetics Corporation | 464D | Jonquiere | — |
| 2012-10-19 | 581-820 | not yet reported which blocks → | TELUS Quebec | 2243 | Lac-Etchemin | — |
| 2012-10-18 | 581-294 | not yet reported which blocks → | Telecommunications Xittel Inc | 247F | Clarke City | — |
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.