NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
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 |
|---|---|---|---|---|---|---|
| 2018-04-04 | 343-677 | not yet reported which blocks → | InnSysVoice Corp | 383H | Wellington | — |
| 2018-04-04 | 343-699 | not yet reported which blocks → | InnSysVoice Corp | 383H | Trenton | — |
| 2018-04-04 | 343-744 | not yet reported which blocks → | InnSysVoice Corp | 383H | Bloomfield | — |
| 2018-04-04 | 343-755 | not yet reported which blocks → | InnSysVoice Corp | 383H | Bancroft | — |
| 2018-04-04 | 343-788 | not yet reported which blocks → | InnSysVoice Corp | 383H | Belleville | — |
| 2018-04-04 | 343-933 | not yet reported which blocks → | InnSysVoice Corp | 383H | Brighton | — |
| 2018-04-03 | 343-255 | not yet reported which blocks → | InnSysVoice Corp | 383H | Frankford | — |
| 2018-04-03 | 343-822 | not yet reported which blocks → | InnSysVoice Corp | 383H | Deseronto | — |
| 2018-04-03 | 343-833 | not yet reported which blocks → | InnSysVoice Corp | 383H | Gananoque | — |
| 2018-04-03 | 343-844 | not yet reported which blocks → | InnSysVoice Corp | 383H | Adolphustown | — |
| 2018-04-03 | 343-855 | not yet reported which blocks → | InnSysVoice Corp | 383H | Bath | — |
| 2018-04-03 | 343-900 | not yet reported which blocks → | InnSysVoice Corp | 383H | Kingston | — |
| 2018-04-03 | 343-922 | not yet reported which blocks → | InnSysVoice Corp | 383H | Wolfe Island | — |
| 2015-11-18 | 343-666 | not yet reported which blocks → | InnSysVoice Corp | 383H | Ottawa-Hull | — |
| 2015-11-18 | 343-667 | not yet reported which blocks → | InnSysVoice Corp | 383H | Kanata-Stittsville | — |
| 2015-08-06 | 343-439 | not yet reported which blocks → | InnSysVoice Corp | 383H | Lancaster | — |
| 2015-08-06 | 343-440 | not yet reported which blocks → | InnSysVoice Corp | 383H | Long Sault | — |
| 2015-08-06 | 343-441 | not yet reported which blocks → | InnSysVoice Corp | 383H | Martintown | — |
| 2015-08-06 | 343-442 | not yet reported which blocks → | InnSysVoice Corp | 383H | Maxville | — |
| 2015-08-06 | 343-443 | not yet reported which blocks → | InnSysVoice Corp | 383H | Morrisburg | — |
| 2015-08-06 | 343-444 | not yet reported which blocks → | InnSysVoice Corp | 383H | Cornwall | — |
| 2015-08-06 | 343-445 | not yet reported which blocks → | InnSysVoice Corp | 383H | St. Eugene | — |
| 2015-08-06 | 343-446 | not yet reported which blocks → | InnSysVoice Corp | 383H | St. Isidore | — |
| 2015-08-06 | 343-447 | not yet reported which blocks → | InnSysVoice Corp | 383H | St-Regis | — |
| 2015-08-06 | 343-448 | not yet reported which blocks → | InnSysVoice Corp | 383H | Vankleek Hill | — |
| 2015-08-06 | 343-449 | not yet reported which blocks → | InnSysVoice Corp | 383H | Williamsburg | — |
| 2015-08-05 | 343-432 | not yet reported which blocks → | InnSysVoice Corp | 383H | Alexandria | — |
| 2015-08-05 | 343-433 | not yet reported which blocks → | InnSysVoice Corp | 383H | Avonmore | — |
| 2015-08-05 | 343-434 | not yet reported which blocks → | InnSysVoice Corp | 383H | Finch | — |
| 2015-08-05 | 343-435 | not yet reported which blocks → | InnSysVoice Corp | 383H | Glen Robertson | — |
| 2015-08-05 | 343-436 | not yet reported which blocks → | InnSysVoice Corp | 383H | Ingleside | — |
| 2015-08-05 | 343-437 | not yet reported which blocks → | InnSysVoice Corp | 383H | Iroquois | — |
| 2015-08-05 | 343-438 | not yet reported which blocks → | InnSysVoice Corp | 383H | L'Orignal | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.