NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 431
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 |
|---|---|---|---|---|---|---|
| 2019-11-19 | 431-728 | not yet reported which blocks → | TELUS Mobility | 646F | Winnipeg | — |
| 2019-11-05 | 431-602 | not yet reported which blocks → | MTS Inc. | 8088 | Brandon | — |
| 2019-11-05 | 431-603 | not yet reported which blocks → | MTS Inc. | 8088 | Dauphin | — |
| 2019-11-05 | 431-604 | not yet reported which blocks → | MTS Inc. | 8088 | Melita | — |
| 2019-11-05 | 431-605 | not yet reported which blocks → | MTS Inc. | 8088 | Morris | — |
| 2019-11-05 | 431-606 | not yet reported which blocks → | MTS Inc. | 8088 | Selkirk | — |
| 2019-11-05 | 431-607 | not yet reported which blocks → | MTS Inc. | 8088 | Steinbach | — |
| 2019-11-05 | 431-608 | not yet reported which blocks → | MTS Inc. | 8088 | Swan River | — |
| 2019-11-05 | 431-609 | not yet reported which blocks → | MTS Inc. | 8088 | Thompson | — |
| 2019-10-28 | 431-700 | not yet reported which blocks → | Iristel Inc. | 346J | Winnipeg | — |
| 2019-10-22 | 431-815 | not yet reported which blocks → | Iristel Inc. | 154E | Winnipeg | — |
| 2019-10-22 | 431-816 | not yet reported which blocks → | Iristel Inc. | 154E | Winnipeg | — |
| 2019-10-10 | 431-276 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2019-10-03 | 431-533 | not yet reported which blocks → | Iristel Inc. | 154E | Austin | — |
| 2019-09-24 | 431-814 | not yet reported which blocks → | Iristel Inc. | 154E | Oakbank | — |
| 2019-09-19 | 431-275 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2019-09-10 | 431-554 | not yet reported which blocks → | TELUS Mobility | 8303 | Winnipeg | — |
| 2019-09-09 | 431-809 | not yet reported which blocks → | Iristel Inc. | 154E | Winnipeg | — |
| 2019-09-09 | 431-812 | not yet reported which blocks → | Iristel Inc. | 154E | Winnipeg | — |
| 2019-09-09 | 431-813 | not yet reported which blocks → | Iristel Inc. | 154E | Winnipeg | — |
| 2019-08-22 | 431-601 | not yet reported which blocks → | MTS Inc. | 8088 | Winnipeg | — |
| 2019-08-15 | 431-872 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Elm Creek | — |
| 2019-08-15 | 431-875 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Oak River | — |
| 2019-08-14 | 431-873 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | St. Claude | — |
| 2019-08-14 | 431-874 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Minto | — |
| 2019-08-14 | 431-876 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Wawanesa | — |
| 2019-07-22 | 431-878 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Inglis | — |
| 2019-07-22 | 431-879 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Rapid City | — |
| 2019-06-04 | 431-381 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | Stonewall | — |
| 2019-04-18 | 431-212 | not yet reported which blocks → | LES.NET (1996) Inc. | 141F | Neepawa | — |
| 2019-04-15 | 431-331 | not yet reported which blocks → | LES.NET (1996) Inc. | 141F | Strathclair | — |
| 2019-03-12 | 431-383 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-03-12 | 431-552 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-03-12 | 431-553 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-03-12 | 431-559 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-03-12 | 431-655 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-03-12 | 431-899 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-03-12 | 431-989 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-03-11 | 431-558 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-03-11 | 431-668 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-03-11 | 431-778 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-03-11 | 431-855 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-03-11 | 431-866 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-03-11 | 431-877 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2019-02-19 | 431-327 | not yet reported which blocks → | Bell West Inc. | 2933 | Ste. Rose du Lac | — |
| 2019-02-19 | 431-461 | not yet reported which blocks → | Bell West Inc. | 2933 | Arborg | — |
| 2019-02-19 | 431-462 | not yet reported which blocks → | Bell West Inc. | 2933 | Easterville | — |
| 2019-02-19 | 431-463 | not yet reported which blocks → | Bell West Inc. | 2933 | Fisher River | — |
| 2019-02-19 | 431-464 | not yet reported which blocks → | Bell West Inc. | 2933 | Gimli | — |
| 2019-02-19 | 431-465 | not yet reported which blocks → | Bell West Inc. | 2933 | Lac Du Bonnet | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.