NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026
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 873
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2024-08-09 | 873-584 | not yet reported which blocks → | Fibernetics Corporation | 464D | Trois-Rivieres | — |
| 2023-08-24 | 873-769 | not yet reported which blocks → | Fibernetics Corporation | 464D | Sherbrooke | — |
| 2023-06-23 | 873-580 | not yet reported which blocks → | Fibernetics Corporation | 464D | Asbestos | — |
| 2023-06-23 | 873-581 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bromptonville | — |
| 2023-06-23 | 873-582 | not yet reported which blocks → | Fibernetics Corporation | 464D | Cookshire | — |
| 2023-06-23 | 873-583 | not yet reported which blocks → | Fibernetics Corporation | 464D | Windsor | — |
| 2023-02-28 | 873-951 | not yet reported which blocks → | Fibernetics Corporation | 464D | Aylmer | — |
| 2023-02-28 | 873-952 | not yet reported which blocks → | Fibernetics Corporation | 464D | Buckingham | — |
| 2023-02-28 | 873-953 | not yet reported which blocks → | Fibernetics Corporation | 464D | Gatineau | — |
| 2023-02-28 | 873-954 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Pierre-de-Wakefield | — |
| 2023-02-01 | 873-895 | not yet reported which blocks → | Fibernetics Corporation | 464D | Lac-Megantic | — |
| 2023-01-26 | 873-448 | not yet reported which blocks → | Fibernetics Corporation | 464D | Drummondville | — |
| 2022-10-11 | 873-252 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ottawa-Hull | — |
| 2022-10-11 | 873-341 | not yet reported which blocks → | Fibernetics Corporation | 464D | Trois-Rivieres | — |
| 2022-04-26 | 873-768 | not yet reported which blocks → | Fibernetics Corporation | 464D | Temiscaming | — |
| 2021-03-18 | 873-758 | not yet reported which blocks → | Fibernetics Corporation | 464D | Fort-Coulonge | — |
| 2021-03-18 | 873-759 | not yet reported which blocks → | Fibernetics Corporation | 464D | Gracefield | — |
| 2021-03-18 | 873-760 | not yet reported which blocks → | Fibernetics Corporation | 464D | Grand-Remous | — |
| 2021-03-18 | 873-761 | not yet reported which blocks → | Fibernetics Corporation | 464D | Kazabazua | — |
| 2021-03-18 | 873-762 | not yet reported which blocks → | Fibernetics Corporation | 464D | Low | — |
| 2021-03-18 | 873-763 | not yet reported which blocks → | Fibernetics Corporation | 464D | Luskville | — |
| 2021-03-18 | 873-764 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montebello | — |
| 2021-03-18 | 873-765 | not yet reported which blocks → | Fibernetics Corporation | 464D | Papineauville | — |
| 2021-03-18 | 873-766 | not yet reported which blocks → | Fibernetics Corporation | 464D | Thurso | — |
| 2021-03-18 | 873-767 | not yet reported which blocks → | Fibernetics Corporation | 464D | Wakefield | — |
| 2021-03-17 | 873-756 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bouchette | — |
| 2021-03-17 | 873-757 | not yet reported which blocks → | Fibernetics Corporation | 464D | Chapeau | — |
| 2021-03-05 | 873-438 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Malo | — |
| 2021-03-05 | 873-439 | not yet reported which blocks → | Fibernetics Corporation | 464D | Stoke | — |
| 2021-03-05 | 873-440 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Sebastien (Frontenac Co.) | — |
| 2021-03-05 | 873-441 | not yet reported which blocks → | Fibernetics Corporation | 464D | Weedon | — |
| 2021-03-05 | 873-442 | not yet reported which blocks → | Fibernetics Corporation | 464D | Windsor | — |
| 2021-03-05 | 873-443 | not yet reported which blocks → | Fibernetics Corporation | 464D | Wotton | — |
| 2021-03-04 | 873-351 | not yet reported which blocks → | Fibernetics Corporation | 464D | La Patrie | — |
| 2021-03-04 | 873-352 | not yet reported which blocks → | Fibernetics Corporation | 464D | Lac-Drolet | — |
| 2021-03-04 | 873-366 | not yet reported which blocks → | Fibernetics Corporation | 464D | Richmond | — |
| 2021-03-04 | 873-367 | not yet reported which blocks → | Fibernetics Corporation | 464D | Sawyerville | — |
| 2021-03-04 | 873-368 | not yet reported which blocks → | Fibernetics Corporation | 464D | Scotstown | — |
| 2021-03-04 | 873-369 | not yet reported which blocks → | Fibernetics Corporation | 464D | South Durham | — |
| 2021-03-04 | 873-370 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Adolphe-de-Dudswell | — |
| 2021-03-03 | 873-345 | not yet reported which blocks → | Fibernetics Corporation | 464D | Chartierville | — |
| 2021-03-03 | 873-346 | not yet reported which blocks → | Fibernetics Corporation | 464D | Cookshire | — |
| 2021-03-03 | 873-347 | not yet reported which blocks → | Fibernetics Corporation | 464D | Danville | — |
| 2021-03-03 | 873-348 | not yet reported which blocks → | Fibernetics Corporation | 464D | Deauville | — |
| 2021-03-03 | 873-349 | not yet reported which blocks → | Fibernetics Corporation | 464D | East Angus | — |
| 2021-03-03 | 873-350 | not yet reported which blocks → | Fibernetics Corporation | 464D | East Hereford | — |
| 2021-02-18 | 873-312 | not yet reported which blocks → | Fibernetics Corporation | 464D | Asbestos | — |
| 2021-02-18 | 873-313 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bishopton | — |
| 2021-02-18 | 873-314 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bromptonville | — |
| 2021-02-18 | 873-315 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bury | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.