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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2022-10-11 | 581-406 | not yet reported which blocks → | Fibernetics Corporation | 464D | Chicoutimi | — |
| 2022-06-30 | 581-689 | not yet reported which blocks → | Fibernetics Corporation | 464D | Quebec | — |
| 2021-03-29 | 581-897 | not yet reported which blocks → | Fibernetics Corporation | 464D | Valcartier | — |
| 2021-03-29 | 581-901 | not yet reported which blocks → | Fibernetics Corporation | 464D | Boischatel | — |
| 2021-03-29 | 581-902 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ste-Anne-de-Beaupre | — |
| 2021-03-29 | 581-903 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ste-Brigitte-de-Laval | — |
| 2021-03-29 | 581-904 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ste-Petronille | — |
| 2021-03-29 | 581-905 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Fereol | — |
| 2021-03-29 | 581-906 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Jean-ile-d'Orleans | — |
| 2021-03-29 | 581-907 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Tite-des-Caps | — |
| 2021-03-26 | 581-896 | not yet reported which blocks → | Fibernetics Corporation | 464D | Stoneham | — |
| 2020-06-23 | 581-662 | not yet reported which blocks → | Fibernetics Corporation | 464D | Loretteville | — |
| 2020-06-23 | 581-663 | not yet reported which blocks → | Fibernetics Corporation | 464D | Notre-Dame-des-Laurentides | — |
| 2020-06-23 | 581-666 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ste-Catherine | — |
| 2013-01-07 | 581-781 | not yet reported which blocks → | Fibernetics Corporation | 464D | Quebec | — |
| 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 | — |
| 2012-03-20 | 581-681 | not yet reported which blocks → | Fibernetics Corporation | 464D | Quebec | — |
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.