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 |
|---|---|---|---|---|---|---|
| 2016-05-26 | 343-331 | not yet reported which blocks → | Comwave Networks | 160G | Vankleek Hill | — |
| 2014-07-31 | 343-320 | not yet reported which blocks → | Comwave Networks | 160G | Brockville | — |
| 2014-07-31 | 343-330 | not yet reported which blocks → | Comwave Networks | 160G | Cornwall | — |
| 2014-07-30 | 343-691 | not yet reported which blocks → | Comwave Networks | 160G | Alfred | — |
| 2013-12-06 | 343-688 | not yet reported which blocks → | Comwave Networks | 160G | Ottawa-Hull | — |
| 2013-12-06 | 343-689 | not yet reported which blocks → | Comwave Networks | 160G | Orleans | — |
| 2013-12-06 | 343-690 | not yet reported which blocks → | Comwave Networks | 160G | Kanata-Stittsville | — |
| 2013-06-21 | 343-268 | not yet reported which blocks → | Comwave Networks | 160G | Arden | — |
| 2013-06-21 | 343-269 | not yet reported which blocks → | Comwave Networks | 160G | Bancroft | — |
| 2013-06-21 | 343-270 | not yet reported which blocks → | Comwave Networks | 160G | Belleville | — |
| 2013-06-21 | 343-271 | not yet reported which blocks → | Comwave Networks | 160G | Brighton | — |
| 2013-06-20 | 343-265 | not yet reported which blocks → | Comwave Networks | 160G | Deseronto | — |
| 2013-06-20 | 343-266 | not yet reported which blocks → | Comwave Networks | 160G | Kingston | — |
| 2013-06-20 | 343-267 | not yet reported which blocks → | Comwave Networks | 160G | Napanee | — |
| 2013-06-20 | 343-272 | not yet reported which blocks → | Comwave Networks | 160G | Northbrook | — |
| 2013-06-20 | 343-273 | not yet reported which blocks → | Comwave Networks | 160G | Plevna | — |
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.