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 |
|---|---|---|---|---|---|---|
| 2019-04-12 | 647-366 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2014-12-02 | 647-243 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2014-09-26 | 647-945 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2014-08-19 | 647-946 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2014-05-28 | 647-948 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2014-02-11 | 647-313 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2012-12-21 | 647-846 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2012-06-22 | 647-849 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2012-05-31 | 647-848 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2012-05-23 | 647-875 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2012-03-01 | 647-872 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2012-03-01 | 647-874 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2012-02-15 | 647-873 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2010-03-09 | 647-247 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2010-03-09 | 647-947 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2010-02-05 | 647-847 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2009-06-18 | 647-547 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2007-11-23 | 647-367 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
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.