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 |
|---|---|---|---|---|---|---|
| 2024-11-11 | 742-770 | not yet reported which blocks → | Fibernetics Corporation | 464D | Niagara Falls | — |
| 2024-11-11 | 742-776 | not yet reported which blocks → | Fibernetics Corporation | 464D | Niagara-On-The-Lake | — |
| 2024-01-31 | 742-772 | not yet reported which blocks → | Fibernetics Corporation | 464D | Newmarket | — |
| 2024-01-31 | 742-773 | not yet reported which blocks → | Fibernetics Corporation | 464D | Richmond Hill | — |
| 2024-01-31 | 742-774 | not yet reported which blocks → | Fibernetics Corporation | 464D | Thornhill | — |
| 2024-01-31 | 742-775 | not yet reported which blocks → | Fibernetics Corporation | 464D | Woodbridge | — |
| 2024-01-29 | 742-771 | not yet reported which blocks → | Fibernetics Corporation | 464D | Markham | — |
| 2023-02-24 | 742-746 | not yet reported which blocks → | Fibernetics Corporation | 464D | Oshawa | — |
| 2023-02-24 | 742-747 | not yet reported which blocks → | Fibernetics Corporation | 464D | South Pickering | — |
| 2023-02-24 | 742-748 | not yet reported which blocks → | Fibernetics Corporation | 464D | Whitby | — |
| 2023-02-23 | 742-745 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ajax-Pickering | — |
| 2023-01-20 | 742-743 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bradford | — |
| 2023-01-20 | 742-744 | not yet reported which blocks → | Fibernetics Corporation | 464D | Tottenham | — |
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.