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 |
|---|---|---|---|---|---|---|
| 2024-07-29 | 431-590 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2024-01-29 | 431-214 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2024-01-17 | 431-203 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2023-12-14 | 431-371 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2023-11-09 | 431-955 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2023-07-31 | 431-323 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2023-05-15 | 431-954 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2023-04-26 | 431-953 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2023-02-07 | 431-952 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2022-12-28 | 431-951 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2022-09-09 | 431-949 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2022-06-21 | 431-294 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2022-06-16 | 431-366 | not yet reported which blocks → | Bell Mobility | 6574 | Steinbach | — |
| 2022-05-25 | 431-948 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2022-03-24 | 431-947 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2022-02-18 | 431-293 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2021-11-09 | 431-946 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2021-07-02 | 431-396 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2021-06-28 | 431-395 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2021-06-15 | 431-279 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2021-03-24 | 431-394 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2021-03-23 | 431-393 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2021-03-15 | 431-392 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2021-03-08 | 431-390 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2021-03-08 | 431-391 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2021-02-23 | 431-209 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2021-01-20 | 431-208 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2021-01-18 | 431-207 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2020-11-05 | 431-945 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2020-11-02 | 431-841 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2020-10-30 | 431-842 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2020-10-29 | 431-843 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2020-10-28 | 431-844 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2020-10-14 | 431-278 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2020-07-06 | 431-277 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2020-04-09 | 431-470 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2020-02-19 | 431-206 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2020-01-07 | 431-542 | not yet reported which blocks → | Bell Mobility | 6574 | Brandon | — |
| 2019-12-04 | 431-243 | not yet reported which blocks → | Bell Mobility | 6574 | Thompson | — |
| 2019-10-10 | 431-276 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2019-09-19 | 431-275 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2019-01-21 | 431-374 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2018-06-28 | 431-339 | not yet reported which blocks → | Bell Mobility | 6574 | Selkirk | — |
| 2018-04-24 | 431-328 | not yet reported which blocks → | Bell Mobility | 6574 | Falcon Lake | — |
| 2018-04-24 | 431-329 | not yet reported which blocks → | Bell Mobility | 6574 | Elie | — |
| 2018-04-24 | 431-330 | not yet reported which blocks → | Bell Mobility | 6574 | Sidney | — |
| 2018-03-15 | 431-373 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2018-02-05 | 431-338 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2018-02-01 | 431-849 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2017-09-13 | 431-295 | not yet reported which blocks → | Bell Mobility | 6574 | Virden | — |
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.