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 579
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 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 |
|---|---|---|---|---|---|---|
| 2019-11-08 | 579-404 | not yet reported which blocks → | Distributel | 083E | St-Calixte-de-Kilkenny | — |
| 2019-11-08 | 579-405 | not yet reported which blocks → | Distributel | 083E | St-Damase | — |
| 2019-11-08 | 579-406 | not yet reported which blocks → | Distributel | 083E | St-Hippolyte | — |
| 2019-11-08 | 579-407 | not yet reported which blocks → | Distributel | 083E | St-Lin | — |
| 2019-11-08 | 579-408 | not yet reported which blocks → | Distributel | 083E | St-Pie | — |
| 2019-11-08 | 579-409 | not yet reported which blocks → | Distributel | 083E | Ste-Anne-des-Plaines | — |
| 2019-11-08 | 579-410 | not yet reported which blocks → | Distributel | 083E | Ste-Madeleine | — |
| 2019-11-07 | 579-402 | not yet reported which blocks → | Distributel | 083E | Actonvale | — |
| 2019-11-07 | 579-403 | not yet reported which blocks → | Distributel | 083E | Mirabel-Aeroport | — |
| 2018-06-15 | 579-306 | not yet reported which blocks → | Distributel | 083E | Laval-Est | — |
| 2018-06-15 | 579-307 | not yet reported which blocks → | Distributel | 083E | Laval-Ouest | — |
| 2018-06-15 | 579-308 | not yet reported which blocks → | Distributel | 083E | St-Vincent-de-Paul | — |
| 2018-06-15 | 579-309 | not yet reported which blocks → | Distributel | 083E | Ste-Rose | — |
| 2018-05-04 | 579-903 | not yet reported which blocks → | Distributel | 083E | Rigaud | — |
| 2018-05-04 | 579-904 | not yet reported which blocks → | Distributel | 083E | Ste-Marthe | — |
| 2018-05-04 | 579-906 | not yet reported which blocks → | Distributel | 083E | Ste-Justine-de-Newton | — |
| 2018-05-04 | 579-907 | not yet reported which blocks → | Distributel | 083E | St-Clet | — |
| 2018-05-04 | 579-909 | not yet reported which blocks → | Distributel | 083E | St-Polycarpe | — |
| 2018-05-04 | 579-912 | not yet reported which blocks → | Distributel | 083E | Ormstown | — |
| 2018-05-04 | 579-915 | not yet reported which blocks → | Distributel | 083E | Riviere-Beaudette | — |
| 2018-05-03 | 579-901 | not yet reported which blocks → | Distributel | 083E | Hudson | — |
| 2018-05-03 | 579-902 | not yet reported which blocks → | Distributel | 083E | Les Cedres | — |
| 2018-05-03 | 579-905 | not yet reported which blocks → | Distributel | 083E | Franklin Centre | — |
| 2018-05-03 | 579-908 | not yet reported which blocks → | Distributel | 083E | Coteau-du-Lac | — |
| 2018-05-03 | 579-910 | not yet reported which blocks → | Distributel | 083E | Coteau-Landing | — |
| 2018-05-03 | 579-913 | not yet reported which blocks → | Distributel | 083E | Huntingdon | — |
| 2018-04-13 | 579-323 | not yet reported which blocks → | Distributel | 083E | St-Cesaire | — |
| 2018-04-13 | 579-324 | not yet reported which blocks → | Distributel | 083E | St-Paul-D'Abbotsford | — |
| 2018-04-13 | 579-325 | not yet reported which blocks → | Distributel | 083E | Waterloo | — |
| 2018-04-13 | 579-328 | not yet reported which blocks → | Distributel | 083E | Mansonville | — |
| 2018-04-13 | 579-329 | not yet reported which blocks → | Distributel | 083E | Sutton | — |
| 2018-04-12 | 579-319 | not yet reported which blocks → | Distributel | 083E | Bromont | — |
| 2018-04-12 | 579-320 | not yet reported which blocks → | Distributel | 083E | Cowansville | — |
| 2018-04-12 | 579-321 | not yet reported which blocks → | Distributel | 083E | Dunham | — |
| 2018-04-12 | 579-322 | not yet reported which blocks → | Distributel | 083E | Knowlton | — |
| 2018-04-12 | 579-326 | not yet reported which blocks → | Distributel | 083E | Eastman | — |
| 2018-04-12 | 579-327 | not yet reported which blocks → | Distributel | 083E | Frelighsburg | — |
| 2018-04-10 | 579-338 | not yet reported which blocks → | Distributel | 083E | Ste-Julienne | — |
| 2018-04-10 | 579-339 | not yet reported which blocks → | Distributel | 083E | St-Gabriel-de-Brandon | — |
| 2018-04-10 | 579-340 | not yet reported which blocks → | Distributel | 083E | St-Jacques | — |
| 2018-04-10 | 579-341 | not yet reported which blocks → | Distributel | 083E | St-Alphonse-de-Rodriguez | — |
| 2018-04-10 | 579-342 | not yet reported which blocks → | Distributel | 083E | St-Jean-de-Matha | — |
| 2018-04-10 | 579-344 | not yet reported which blocks → | Distributel | 083E | St-Felix-de-Valois | — |
| 2018-04-10 | 579-345 | not yet reported which blocks → | Distributel | 083E | St-Zenon | — |
| 2018-04-10 | 579-346 | not yet reported which blocks → | Distributel | 083E | St-Barthelemy | — |
| 2018-04-10 | 579-347 | not yet reported which blocks → | Distributel | 083E | St-Michel-des-Saints | — |
| 2018-03-22 | 579-312 | not yet reported which blocks → | Distributel | 083E | Chambly | — |
| 2018-03-22 | 579-313 | not yet reported which blocks → | Distributel | 083E | Marieville | — |
| 2018-03-22 | 579-314 | not yet reported which blocks → | Distributel | 083E | St-Bruno | — |
| 2018-03-22 | 579-315 | not yet reported which blocks → | Distributel | 083E | St-Marc | — |
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.