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.
Most active assignees, all time — NPA 343
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2025-10-14 | 343-518 | not yet reported which blocks → | Iristel Inc. | 154E | Hawkesbury | — |
| 2025-05-02 | 343-328 | not yet reported which blocks → | Iristel Inc. | 154E | Perth | — |
| 2025-05-02 | 343-514 | not yet reported which blocks → | Iristel Inc. | 154E | Hawkesbury | — |
| 2024-10-15 | 343-842 | not yet reported which blocks → | Iristel Inc. | 154E | Vankleek Hill | — |
| 2024-10-09 | 343-802 | not yet reported which blocks → | Iristel Inc. | 154E | Smiths Falls | — |
| 2024-09-25 | 343-326 | not yet reported which blocks → | Iristel Inc. | 154E | Kanata-Stittsville | — |
| 2024-09-04 | 343-296 | not yet reported which blocks → | Iristel Inc. | 154E | Carleton Place | — |
| 2024-08-27 | 343-459 | not yet reported which blocks → | Iristel Inc. | 154E | Belleville | — |
| 2024-05-03 | 343-337 | not yet reported which blocks → | Iristel Inc. | 154E | Merrickville | — |
| 2023-10-30 | 343-554 | not yet reported which blocks → | Iristel Inc. | 346J | Ottawa-Hull | — |
| 2023-10-30 | 343-556 | not yet reported which blocks → | Iristel Inc. | 346J | Ottawa-Hull | — |
| 2023-10-04 | 343-634 | not yet reported which blocks → | Iristel Inc. | 154E | Cornwall | — |
| 2023-09-19 | 343-632 | not yet reported which blocks → | Iristel Inc. | 154E | Cornwall | — |
| 2023-09-19 | 343-635 | not yet reported which blocks → | Iristel Inc. | 154E | Cornwall | — |
| 2023-09-19 | 343-637 | not yet reported which blocks → | Iristel Inc. | 154E | Cornwall | — |
| 2022-12-05 | 343-512 | not yet reported which blocks → | Iristel Inc. | 154E | Hawkesbury | — |
| 2022-11-30 | 343-513 | not yet reported which blocks → | Iristel Inc. | 154E | Jockvale | — |
| 2022-10-20 | 343-947 | not yet reported which blocks → | Iristel Inc. | 154E | Bancroft | — |
| 2022-10-19 | 343-316 | not yet reported which blocks → | Iristel Inc. | 154E | Cornwall | — |
| 2022-04-20 | 343-505 | not yet reported which blocks → | Iristel Inc. | 154E | Kingston | — |
| 2022-01-27 | 343-321 | not yet reported which blocks → | Iristel Inc. | 154E | Perth | — |
| 2020-09-25 | 343-353 | not yet reported which blocks → | Iristel Inc. | 154E | Kanata-Stittsville | — |
| 2020-09-25 | 343-946 | not yet reported which blocks → | Iristel Inc. | 154E | Bancroft | — |
| 2020-09-21 | 343-314 | not yet reported which blocks → | Iristel Inc. | 154E | Cornwall | — |
| 2020-09-21 | 343-504 | not yet reported which blocks → | Iristel Inc. | 154E | Brockville | — |
| 2020-09-11 | 343-342 | not yet reported which blocks → | Iristel Inc. | 154E | Vankleek Hill | — |
| 2020-09-01 | 343-655 | not yet reported which blocks → | Iristel Inc. | 154E | Ottawa-Hull | — |
| 2020-02-26 | 343-453 | not yet reported which blocks → | Iristel Inc. | 154E | Belleville | — |
| 2019-12-27 | 343-633 | not yet reported which blocks → | Iristel Inc. | 154E | Ottawa-Hull | — |
| 2019-12-27 | 343-644 | not yet reported which blocks → | Iristel Inc. | 154E | Ottawa-Hull | — |
| 2019-10-17 | 343-338 | not yet reported which blocks → | Iristel Inc. | 154E | Merrickville | — |
| 2019-07-30 | 343-807 | not yet reported which blocks → | Iristel Inc. | 154E | Ottawa-Hull | — |
| 2019-07-30 | 343-808 | not yet reported which blocks → | Iristel Inc. | 154E | Ottawa-Hull | — |
| 2019-07-30 | 343-809 | not yet reported which blocks → | Iristel Inc. | 154E | Ottawa-Hull | — |
| 2019-07-25 | 343-313 | not yet reported which blocks → | Iristel Inc. | 154E | Jockvale | — |
| 2019-06-26 | 343-429 | not yet reported which blocks → | Iristel Inc. | 154E | Carleton Place | — |
| 2019-06-26 | 343-806 | not yet reported which blocks → | Iristel Inc. | 154E | Ottawa-Hull | — |
| 2019-06-14 | 343-502 | not yet reported which blocks → | Iristel Inc. | 346J | Ottawa-Hull | — |
| 2019-05-29 | 343-501 | not yet reported which blocks → | Iristel Inc. | 154E | Brockville | — |
| 2018-07-09 | 343-339 | not yet reported which blocks → | Iristel Inc. | 154E | Merrickville | — |
| 2018-07-04 | 343-804 | not yet reported which blocks → | Iristel Inc. | 154E | Ottawa-Hull | — |
| 2018-07-04 | 343-805 | not yet reported which blocks → | Iristel Inc. | 154E | Ottawa-Hull | — |
| 2018-06-21 | 343-945 | not yet reported which blocks → | Iristel Inc. | 154E | Bancroft | — |
| 2017-11-23 | 343-312 | not yet reported which blocks → | Iristel Inc. | 154E | Jockvale | — |
| 2017-11-21 | 343-309 | not yet reported which blocks → | Iristel Inc. | 154E | Cornwall | — |
| 2017-08-24 | 343-308 | not yet reported which blocks → | Iristel Inc. | 154E | Kanata-Stittsville | — |
| 2017-08-24 | 343-801 | not yet reported which blocks → | Iristel Inc. | 154E | Smiths Falls | — |
| 2017-08-23 | 343-430 | not yet reported which blocks → | Iristel Inc. | 154E | Carleton Place | — |
| 2017-08-21 | 343-307 | not yet reported which blocks → | Iristel Inc. | 154E | Brockville | — |
| 2017-08-21 | 343-944 | not yet reported which blocks → | Iristel Inc. | 154E | Bancroft | — |
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.