NumberResearchRecent prefix assignments
1 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.
Most active assignees, last 30 days — 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 |
|---|---|---|---|---|---|---|
| 2023-10-03 | 343-951 | not yet reported which blocks → | Fibernetics Corporation | 464D | Brockville | — |
| 2023-10-03 | 343-952 | not yet reported which blocks → | Fibernetics Corporation | 464D | Delta | — |
| 2023-09-25 | 343-843 | not yet reported which blocks → | Videotron Ltd. | 787G | Ottawa-Hull | — |
| 2023-09-21 | 343-703 | not yet reported which blocks → | Videotron Ltd. | 328F | Brockville | — |
| 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 | — |
| 2023-09-08 | 343-631 | not yet reported which blocks → | Bell Mobility | 6574 | Ottawa-Hull | — |
| 2023-05-16 | 343-630 | not yet reported which blocks → | Bell Mobility | 6574 | Ottawa-Hull | — |
| 2023-04-11 | 343-319 | not yet reported which blocks → | Cogeco Connexion Inc. | 221K | Cornwall | — |
| 2022-12-06 | 343-598 | not yet reported which blocks → | Bell Mobility | 6574 | Ottawa-Hull | — |
| 2022-12-05 | 343-512 | not yet reported which blocks → | Iristel Inc. | 154E | Hawkesbury | — |
| 2022-12-01 | 343-796 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Inverary | — |
| 2022-12-01 | 343-797 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Tweed | — |
| 2022-12-01 | 343-798 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Pakenham | — |
| 2022-11-30 | 343-513 | not yet reported which blocks → | Iristel Inc. | 154E | Jockvale | — |
| 2022-11-21 | 343-746 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | North Augusta | — |
| 2022-11-07 | 343-685 | not yet reported which blocks → | Fibernetics Corporation | 464D | Belleville | — |
| 2022-11-07 | 343-687 | not yet reported which blocks → | Fibernetics Corporation | 464D | Picton | — |
| 2022-10-28 | 343-322 | not yet reported which blocks → | Videotron Ltd. | 787G | Ottawa-Hull | — |
| 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 | — |
| 2022-10-14 | 343-226 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Russell | — |
| 2022-10-14 | 343-318 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Pakenham | — |
| 2022-10-14 | 343-412 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Rockland | — |
| 2022-10-04 | 343-596 | not yet reported which blocks → | Bell Mobility | 6574 | Ottawa-Hull | — |
| 2022-08-18 | 343-654 | not yet reported which blocks → | Westport Telephone Company Limited | 920D | Smiths Falls | — |
| 2022-08-11 | 343-709 | not yet reported which blocks → | Distributel | 082E | Bancroft | — |
| 2022-08-11 | 343-710 | not yet reported which blocks → | Distributel | 082E | Belleville | — |
| 2022-08-11 | 343-734 | not yet reported which blocks → | Distributel | 082E | Brighton | — |
| 2022-08-11 | 343-735 | not yet reported which blocks → | Distributel | 082E | Frankford | — |
| 2022-08-11 | 343-736 | not yet reported which blocks → | Distributel | 082E | Madoc | — |
| 2022-08-11 | 343-738 | not yet reported which blocks → | Distributel | 082E | Marmora | — |
| 2022-08-11 | 343-739 | not yet reported which blocks → | Distributel | 082E | Northbrook | — |
| 2022-08-11 | 343-740 | not yet reported which blocks → | Distributel | 082E | Picton | — |
| 2022-08-11 | 343-741 | not yet reported which blocks → | Distributel | 082E | Stirling | — |
| 2022-08-11 | 343-742 | not yet reported which blocks → | Distributel | 082E | Trenton | — |
| 2022-08-11 | 343-743 | not yet reported which blocks → | Distributel | 082E | Tweed | — |
| 2022-08-11 | 343-745 | not yet reported which blocks → | Distributel | 082E | Wellington | — |
| 2022-07-21 | 343-597 | not yet reported which blocks → | Bell Mobility | 6574 | Ottawa-Hull | — |
| 2022-07-19 | 343-992 | not yet reported which blocks → | Bell Canada | 8051 | Ottawa-Hull | — |
| 2022-07-19 | 343-993 | not yet reported which blocks → | Bell Canada | 8051 | Ottawa-Hull | — |
| 2022-07-18 | 343-991 | not yet reported which blocks → | Bell Canada | 8051 | Ottawa-Hull | — |
| 2022-07-11 | 343-557 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Maynooth | — |
| 2022-07-11 | 343-701 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Seeleys Bay | — |
| 2022-07-11 | 343-702 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Selby | — |
| 2022-07-07 | 343-990 | not yet reported which blocks → | Bell Canada | 8051 | Ottawa-Hull | — |
| 2022-06-30 | 343-506 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lancaster | — |
| 2022-04-20 | 343-505 | not yet reported which blocks → | Iristel Inc. | 154E | Kingston | — |
| 2022-04-19 | 343-224 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Ottawa-Hull | — |
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.