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
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2016-05-25 | 579-270 | not yet reported which blocks → | Comwave Networks | 160G | Bedford | — |
| 2016-05-25 | 579-271 | not yet reported which blocks → | Comwave Networks | 160G | Farnham | — |
| 2016-05-25 | 579-272 | not yet reported which blocks → | Comwave Networks | 160G | Lacolle | — |
| 2016-05-25 | 579-741 | not yet reported which blocks → | Comwave Networks | 160G | Actonvale | — |
| 2016-04-25 | 579-921 | not yet reported which blocks → | Comwave Networks | 160G | Franklin Centre | — |
| 2016-04-25 | 579-922 | not yet reported which blocks → | Comwave Networks | 160G | Les Cedres | — |
| 2016-04-25 | 579-923 | not yet reported which blocks → | Comwave Networks | 160G | Ormstown | — |
| 2016-04-25 | 579-924 | not yet reported which blocks → | Comwave Networks | 160G | Riviere-Beaudette | — |
| 2016-04-25 | 579-925 | not yet reported which blocks → | Comwave Networks | 160G | St-Clet | — |
| 2016-04-25 | 579-926 | not yet reported which blocks → | Comwave Networks | 160G | Ste-Justine-de-Newton | — |
| 2016-04-25 | 579-927 | not yet reported which blocks → | Comwave Networks | 160G | Ste-Marthe | — |
| 2016-04-25 | 579-940 | not yet reported which blocks → | Comwave Networks | 160G | Coteau-Landing | — |
| 2016-04-21 | 579-928 | not yet reported which blocks → | Comwave Networks | 160G | Vaudreuil | — |
| 2015-10-13 | 579-920 | not yet reported which blocks → | Comwave Networks | 160G | Valleyfield | — |
| 2015-06-09 | 579-269 | not yet reported which blocks → | Comwave Networks | 160G | Sorel | — |
| 2015-03-23 | 579-740 | not yet reported which blocks → | Comwave Networks | 160G | Joliette | — |
| 2014-05-12 | 579-267 | not yet reported which blocks → | Comwave Networks | 160G | St-Jean | — |
| 2014-05-12 | 579-268 | not yet reported which blocks → | Comwave Networks | 160G | St-Hyacinthe | — |
| 2014-04-07 | 579-277 | not yet reported which blocks → | Comwave Networks | 160G | Ste-Therese | — |
| 2014-04-07 | 579-278 | not yet reported which blocks → | Comwave Networks | 160G | St-Jerome | — |
| 2013-11-06 | 579-808 | not yet reported which blocks → | Comwave Networks | 160G | Terrebonne | — |
| 2013-11-06 | 579-818 | not yet reported which blocks → | Comwave Networks | 160G | St-Eustache | — |
| 2013-11-06 | 579-828 | not yet reported which blocks → | Comwave Networks | 160G | Oka | — |
| 2013-11-06 | 579-838 | not yet reported which blocks → | Comwave Networks | 160G | Mirabel-Ste-Scholastique | — |
| 2013-11-06 | 579-858 | not yet reported which blocks → | Comwave Networks | 160G | Mirabel-St-Augustin | — |
| 2013-08-14 | 579-737 | not yet reported which blocks → | Comwave Networks | 160G | St-Cesaire | — |
| 2013-08-14 | 579-738 | not yet reported which blocks → | Comwave Networks | 160G | Dunham | — |
| 2013-08-14 | 579-739 | not yet reported which blocks → | Comwave Networks | 160G | Eastman | — |
| 2013-08-14 | 579-786 | not yet reported which blocks → | Comwave Networks | 160G | Knowlton | — |
| 2013-08-14 | 579-787 | not yet reported which blocks → | Comwave Networks | 160G | Granby | — |
| 2013-08-14 | 579-788 | not yet reported which blocks → | Comwave Networks | 160G | Mansonville | — |
| 2013-08-14 | 579-789 | not yet reported which blocks → | Comwave Networks | 160G | Sutton | — |
| 2013-08-14 | 579-797 | not yet reported which blocks → | Comwave Networks | 160G | Waterloo | — |
| 2013-06-21 | 579-288 | not yet reported which blocks → | Comwave Networks | 160G | Chateauguay | — |
| 2013-05-07 | 579-799 | not yet reported which blocks → | Comwave Networks | 160G | Longueuil | — |
| 2013-04-10 | 579-919 | not yet reported which blocks → | Comwave Networks | 160G | Pont-Viau | — |
| 2013-04-10 | 579-929 | not yet reported which blocks → | Comwave Networks | 160G | Chomedey | — |
| 2013-04-10 | 579-939 | not yet reported which blocks → | Comwave Networks | 160G | Laval-Est | — |
| 2013-04-10 | 579-969 | not yet reported which blocks → | Comwave Networks | 160G | Ste-Rose | — |
| 2013-04-10 | 579-989 | not yet reported which blocks → | Comwave Networks | 160G | Laval-Ouest | — |
| 2013-04-09 | 579-266 | not yet reported which blocks → | Comwave Networks | 160G | St-Lambert | — |
| 2013-04-09 | 579-859 | not yet reported which blocks → | Comwave Networks | 160G | Marieville | — |
| 2013-04-09 | 579-869 | not yet reported which blocks → | Comwave Networks | 160G | Laprairie | — |
| 2013-04-09 | 579-949 | not yet reported which blocks → | Comwave Networks | 160G | Beloeil | — |
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.