NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026
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 |
|---|---|---|---|---|---|---|
| 2026-07-13 | 431-910 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Pine River | — |
| 2026-07-13 | 431-912 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Ethelbert | — |
| 2025-08-08 | 431-591 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Sifton | — |
| 2025-08-08 | 431-592 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Fork River | — |
| 2025-08-08 | 431-593 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Winnipegosis | — |
| 2025-08-08 | 431-594 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Ochre River | — |
| 2025-08-08 | 431-595 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Eden | — |
| 2025-08-08 | 431-596 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Kelwood | — |
| 2025-07-11 | 431-510 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Plumas | — |
| 2022-06-27 | 431-909 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Mafeking | — |
| 2021-08-19 | 431-905 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Benito | — |
| 2021-08-19 | 431-906 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Birch River | — |
| 2021-08-19 | 431-907 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Bowsman | — |
| 2021-08-19 | 431-908 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Clear Lake | — |
| 2021-08-06 | 431-903 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Holland | — |
| 2021-08-06 | 431-904 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Cypress River | — |
| 2021-06-16 | 431-867 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Crystal City | — |
| 2021-06-16 | 431-868 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Pilot Mound | — |
| 2021-05-13 | 431-869 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Somerset | — |
| 2021-05-13 | 431-870 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Swan Lake | — |
| 2020-12-21 | 431-871 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Notre Dame de Lourdes | — |
| 2020-08-11 | 431-900 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Treherne | — |
| 2020-08-11 | 431-901 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Rathwell | — |
| 2020-08-11 | 431-902 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Austin | — |
| 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 | — |
| 2018-10-04 | 431-896 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | McCreary | — |
| 2018-10-04 | 431-897 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Sandy Lake | — |
| 2018-10-04 | 431-898 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | St. Lazare | — |
| 2018-08-24 | 431-895 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Elkhorn | — |
| 2018-07-23 | 431-894 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Gladstone | — |
| 2018-03-19 | 431-892 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Gilbert Plains | — |
| 2018-03-19 | 431-893 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Grandview | — |
| 2017-06-23 | 431-880 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Binscarth | — |
| 2017-06-23 | 431-883 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Rossburn | — |
| 2017-06-23 | 431-891 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Strathclair | — |
| 2017-05-01 | 431-881 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Birtle | — |
| 2017-05-01 | 431-882 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Hamiota | — |
| 2017-05-01 | 431-890 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Roblin | — |
| 2017-03-16 | 431-884 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Shoal Lake | — |
| 2017-03-16 | 431-888 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Russell | — |
| 2016-12-20 | 431-886 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Melita | — |
| 2016-12-20 | 431-889 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Deloraine | — |
| 2016-08-03 | 431-299 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Glenboro | — |
| 2016-08-03 | 431-399 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Erickson | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.