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 |
|---|---|---|---|---|---|---|
| 2013-05-23 | 613-412 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bancroft | — |
| 2013-05-22 | 613-416 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ottawa-Hull | — |
| 2013-05-22 | 613-681 | not yet reported which blocks → | Fibernetics Corporation | 464D | Trenton | — |
| 2013-05-22 | 613-713 | not yet reported which blocks → | Fibernetics Corporation | 464D | Kemptville | — |
| 2013-05-22 | 613-814 | not yet reported which blocks → | Fibernetics Corporation | 464D | Brighton | — |
| 2013-05-22 | 613-906 | not yet reported which blocks → | Fibernetics Corporation | 464D | Picton | — |
| 2013-05-22 | 613-908 | not yet reported which blocks → | Fibernetics Corporation | 464D | Manotick | — |
| 2013-05-22 | 613-964 | not yet reported which blocks → | Fibernetics Corporation | 464D | Carleton Place | — |
| 2013-05-22 | 613-974 | not yet reported which blocks → | Fibernetics Corporation | 464D | Kanata-Stittsville | — |
| 2013-05-17 | 613-554 | not yet reported which blocks → | Fibernetics Corporation | 464D | Belleville | — |
| 2013-05-17 | 613-666 | not yet reported which blocks → | Fibernetics Corporation | 464D | Madoc | — |
| 2009-05-22 | 613-651 | not yet reported which blocks → | Fibernetics Corporation | 464D | Trenton | — |
| 2009-05-22 | 613-654 | not yet reported which blocks → | Fibernetics Corporation | 464D | Picton | — |
| 2009-05-22 | 613-815 | not yet reported which blocks → | Fibernetics Corporation | 464D | Gananoque | — |
| 2009-05-07 | 613-689 | not yet reported which blocks → | Fibernetics Corporation | 464D | Belleville | — |
| 2009-05-07 | 613-817 | not yet reported which blocks → | Fibernetics Corporation | 464D | Kingston | — |
| 2008-09-17 | 613-434 | not yet reported which blocks → | Fibernetics Corporation | 464D | Carleton Place | — |
| 2008-09-17 | 613-616 | not yet reported which blocks → | Fibernetics Corporation | 464D | Delta | — |
| 2008-09-17 | 613-663 | not yet reported which blocks → | Fibernetics Corporation | 464D | Kanata-Stittsville | — |
| 2008-09-17 | 613-664 | not yet reported which blocks → | Fibernetics Corporation | 464D | Maitland | — |
| 2008-09-17 | 613-665 | not yet reported which blocks → | Fibernetics Corporation | 464D | North Augusta | — |
| 2007-11-20 | 613-366 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ottawa-Hull | — |
| 2007-08-30 | 613-648 | not yet reported which blocks → | Fibernetics Corporation | 464D | Spencerville | — |
| 2007-08-30 | 613-655 | not yet reported which blocks → | Fibernetics Corporation | 464D | Cardinal | — |
| 2007-08-30 | 613-927 | not yet reported which blocks → | Fibernetics Corporation | 464D | Athens | — |
| 2007-08-30 | 613-973 | not yet reported which blocks → | Fibernetics Corporation | 464D | Mallorytown | — |
| 2007-08-30 | 613-975 | not yet reported which blocks → | Fibernetics Corporation | 464D | Prescott | — |
| 2007-08-08 | 613-423 | not yet reported which blocks → | Fibernetics Corporation | 464D | Brockville | — |
| 2007-08-08 | 613-529 | not yet reported which blocks → | Fibernetics Corporation | 464D | Prescott | — |
| 2007-07-13 | 613-499 | not yet reported which blocks → | Fibernetics Corporation | 464D | Brockville | — |
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.