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 |
|---|---|---|---|---|---|---|
| 2024-08-09 | 438-232 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2023-10-12 | 438-739 | not yet reported which blocks → | Fibernetics Corporation | 464D | Pointe-Claire | — |
| 2023-10-12 | 438-740 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ste-Genevieve | — |
| 2023-02-02 | 438-236 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2022-09-08 | 438-970 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ile-Perrot | — |
| 2022-09-08 | 438-971 | not yet reported which blocks → | Fibernetics Corporation | 464D | Lachine | — |
| 2022-09-08 | 438-972 | not yet reported which blocks → | Fibernetics Corporation | 464D | Roxboro | — |
| 2022-09-08 | 438-973 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ste-Genevieve | — |
| 2021-07-27 | 438-237 | not yet reported which blocks → | Fibernetics Corporation | 464D | Pointe-Claire | — |
| 2021-07-20 | 438-769 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2020-04-23 | 438-770 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2014-11-24 | 438-771 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2014-11-24 | 438-772 | not yet reported which blocks → | Fibernetics Corporation | 464D | Roxboro | — |
| 2014-08-19 | 438-239 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2014-02-11 | 438-788 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2013-12-03 | 438-558 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2013-06-14 | 438-228 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2013-03-05 | 438-488 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2012-12-20 | 438-448 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2012-03-20 | 438-738 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2012-03-20 | 438-818 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ste-Genevieve | — |
| 2012-03-20 | 438-819 | not yet reported which blocks → | Fibernetics Corporation | 464D | Lachine | — |
| 2012-03-09 | 438-538 | not yet reported which blocks → | Fibernetics Corporation | 464D | Pointe-Claire | — |
| 2012-03-09 | 438-638 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ile-Perrot | — |
| 2012-03-01 | 438-388 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2010-03-09 | 438-238 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
| 2009-06-18 | 438-338 | not yet reported which blocks → | Fibernetics Corporation | 464D | Montreal | — |
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.