NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026
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 |
|---|---|---|---|---|---|---|
| 2020-10-06 | 365-369 | not yet reported which blocks → | Fibernetics Corporation | 464D | Beeton | — |
| 2020-09-22 | 365-849 | not yet reported which blocks → | Fibernetics Corporation | 464D | Gormley | — |
| 2020-08-06 | 365-681 | not yet reported which blocks → | Fibernetics Corporation | 464D | Claremont | — |
| 2020-08-06 | 365-682 | not yet reported which blocks → | Fibernetics Corporation | 464D | Mount Albert | — |
| 2020-08-04 | 365-312 | not yet reported which blocks → | Fibernetics Corporation | 464D | Beamsville | — |
| 2020-08-04 | 365-313 | not yet reported which blocks → | Fibernetics Corporation | 464D | Port Colborne | — |
| 2020-08-04 | 365-314 | not yet reported which blocks → | Fibernetics Corporation | 464D | Vineland | — |
| 2020-08-04 | 365-680 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bethesda | — |
| 2020-07-17 | 365-367 | not yet reported which blocks → | Fibernetics Corporation | 464D | Niagara Falls | — |
| 2020-07-17 | 365-368 | not yet reported which blocks → | Fibernetics Corporation | 464D | Niagara-On-The-Lake | — |
| 2020-06-17 | 365-852 | not yet reported which blocks → | Fibernetics Corporation | 464D | Streetsville | — |
| 2020-06-11 | 365-306 | not yet reported which blocks → | Fibernetics Corporation | 464D | Castlemore | — |
| 2020-06-11 | 365-307 | not yet reported which blocks → | Fibernetics Corporation | 464D | Snelgrove | — |
| 2020-06-11 | 365-308 | not yet reported which blocks → | Fibernetics Corporation | 464D | Caledonia | — |
| 2020-06-11 | 365-309 | not yet reported which blocks → | Fibernetics Corporation | 464D | Grimsby | — |
| 2020-06-09 | 365-850 | not yet reported which blocks → | Fibernetics Corporation | 464D | Clarkson | — |
| 2020-06-09 | 365-851 | not yet reported which blocks → | Fibernetics Corporation | 464D | Port Credit | — |
| 2020-06-09 | 365-853 | not yet reported which blocks → | Fibernetics Corporation | 464D | Burlington | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.