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
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2023-02-13 | 581-753 | not yet reported which blocks → | TELUS Quebec | 2243 | La Malbaie | — |
| 2022-03-25 | 581-697 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Jean-de-Dieu | — |
| 2022-03-25 | 581-698 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Honore (Temiscouata Co.) | — |
| 2021-03-02 | 581-867 | not yet reported which blocks → | TELUS Quebec | 8083 | Amqui | — |
| 2021-03-02 | 581-913 | not yet reported which blocks → | TELUS Quebec | 8083 | Chandler | — |
| 2021-03-02 | 581-917 | not yet reported which blocks → | TELUS Quebec | 8083 | Grande-Riviere | — |
| 2021-03-02 | 581-918 | not yet reported which blocks → | TELUS Quebec | 8083 | Chute-aux-Outardes | — |
| 2021-03-02 | 581-919 | not yet reported which blocks → | TELUS Quebec | 8083 | Baie-Comeau | — |
| 2021-03-02 | 581-921 | not yet reported which blocks → | TELUS Quebec | 8083 | Causapscal | — |
| 2021-03-01 | 581-914 | not yet reported which blocks → | TELUS Quebec | 8083 | Riviere-au-Renard | — |
| 2021-03-01 | 581-915 | not yet reported which blocks → | TELUS Quebec | 8083 | Sainte-Anne-des-Monts | — |
| 2021-03-01 | 581-916 | not yet reported which blocks → | TELUS Quebec | 8083 | Forestville | — |
| 2021-02-10 | 581-923 | not yet reported which blocks → | TELUS Quebec | 8083 | New Carlisle | — |
| 2021-02-10 | 581-924 | not yet reported which blocks → | TELUS Quebec | 8083 | Saint-Tite | — |
| 2021-02-09 | 581-952 | not yet reported which blocks → | TELUS Quebec | 8083 | Pont-Rouge | — |
| 2021-02-08 | 581-926 | not yet reported which blocks → | TELUS Quebec | 8083 | Saint-Stanislas | — |
| 2021-02-08 | 581-948 | not yet reported which blocks → | TELUS Quebec | 8083 | Carleton | — |
| 2021-02-08 | 581-949 | not yet reported which blocks → | TELUS Quebec | 8083 | New Richmond | — |
| 2021-02-08 | 581-951 | not yet reported which blocks → | TELUS Quebec | 8083 | Pointe-a-la-Croix | — |
| 2021-02-08 | 581-953 | not yet reported which blocks → | TELUS Quebec | 8083 | Portneuf | — |
| 2021-02-08 | 581-954 | not yet reported which blocks → | TELUS Quebec | 8083 | Saint-Augustin | — |
| 2021-02-08 | 581-956 | not yet reported which blocks → | TELUS Quebec | 8083 | Saint-Marc-des-Carrieres | — |
| 2021-02-08 | 581-957 | not yet reported which blocks → | TELUS Quebec | 8083 | Saint-Raymond | — |
| 2020-10-19 | 581-947 | not yet reported which blocks → | TELUS Quebec | 2243 | Cap-aux-Meules | — |
| 2020-06-04 | 581-945 | not yet reported which blocks → | TELUS Quebec | 2243 | Lambton | — |
| 2020-06-04 | 581-946 | not yet reported which blocks → | TELUS Quebec | 2243 | Courcelles | — |
| 2019-08-02 | 581-381 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Ephrem-de-Beauce | — |
| 2019-08-02 | 581-625 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Victor-de-Beauce | — |
| 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 | — |
| 2018-06-05 | 581-554 | not yet reported which blocks → | TELUS Quebec | 8083 | Saint-Henri-de-Levis | — |
| 2017-11-16 | 581-220 | not yet reported which blocks → | TELUS Quebec | 2243 | Ville Degelis | — |
| 2017-09-28 | 581-553 | not yet reported which blocks → | TELUS Quebec | 8083 | Sainte-Marie-de-Beauce | — |
| 2017-05-19 | 581-368 | not yet reported which blocks → | TELUS Quebec | 8083 | Saint-Alexis-de-Matapedia | — |
| 2017-05-19 | 581-369 | not yet reported which blocks → | TELUS Quebec | 8083 | Matapedia | — |
| 2016-05-19 | 581-219 | not yet reported which blocks → | TELUS Quebec | 2243 | Valcartier | — |
| 2015-04-10 | 581-550 | not yet reported which blocks → | TELUS Quebec | 8083 | Sainte-Marie-de-Beauce | — |
| 2015-04-10 | 581-551 | not yet reported which blocks → | TELUS Quebec | 8083 | Saint-Henri-de-Levis | — |
| 2015-04-10 | 581-552 | not yet reported which blocks → | TELUS Quebec | 8083 | Montmagny | — |
| 2015-04-06 | 581-548 | not yet reported which blocks → | TELUS Quebec | 2243 | Cabano | — |
| 2015-04-06 | 581-549 | not yet reported which blocks → | TELUS Quebec | 2243 | Trois-Pistoles | — |
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.