NumberResearchRecent prefix assignments
0 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, all time — NPA 431
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Dec 2025
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2018-06-12 | 431-518 | not yet reported which blocks → | Distributel | 081E | Roland | — |
| 2018-06-12 | 431-519 | not yet reported which blocks → | Distributel | 081E | Sanford | — |
| 2018-06-12 | 431-520 | not yet reported which blocks → | Distributel | 081E | Sidney | — |
| 2018-06-12 | 431-521 | not yet reported which blocks → | Distributel | 081E | Somerset | — |
| 2018-06-12 | 431-522 | not yet reported which blocks → | Distributel | 081E | Southport | — |
| 2018-06-12 | 431-523 | not yet reported which blocks → | Distributel | 081E | Sperling | — |
| 2018-06-12 | 431-524 | not yet reported which blocks → | Distributel | 081E | St. Claude | — |
| 2018-06-12 | 431-525 | not yet reported which blocks → | Distributel | 081E | Starbuck | — |
| 2018-06-12 | 431-526 | not yet reported which blocks → | Distributel | 081E | Stephenfield | — |
| 2018-06-12 | 431-527 | not yet reported which blocks → | Distributel | 081E | St. Francois Xavier | — |
| 2018-06-12 | 431-528 | not yet reported which blocks → | Distributel | 081E | Stonewall | — |
| 2018-06-12 | 431-529 | not yet reported which blocks → | Distributel | 081E | Swan Lake | — |
| 2018-06-12 | 431-530 | not yet reported which blocks → | Distributel | 081E | Treherne | — |
| 2018-06-11 | 431-494 | not yet reported which blocks → | Distributel | 081E | Dugald | — |
| 2018-06-11 | 431-495 | not yet reported which blocks → | Distributel | 081E | Edwin | — |
| 2018-06-11 | 431-496 | not yet reported which blocks → | Distributel | 081E | Elie | — |
| 2018-06-11 | 431-497 | not yet reported which blocks → | Distributel | 081E | Elm Creek | — |
| 2018-06-11 | 431-498 | not yet reported which blocks → | Distributel | 081E | Gladstone | — |
| 2018-06-11 | 431-499 | not yet reported which blocks → | Distributel | 081E | Hazelridge | — |
| 2018-06-11 | 431-501 | not yet reported which blocks → | Distributel | 081E | Holland | — |
| 2018-06-11 | 431-502 | not yet reported which blocks → | Distributel | 081E | Langruth | — |
| 2018-06-11 | 431-503 | not yet reported which blocks → | Distributel | 081E | Macdonald | — |
| 2018-06-11 | 431-504 | not yet reported which blocks → | Distributel | 081E | Macgregor | — |
| 2018-06-11 | 431-505 | not yet reported which blocks → | Distributel | 081E | Miami | — |
| 2018-06-11 | 431-512 | not yet reported which blocks → | Distributel | 081E | Notre Dame de Lourdes | — |
| 2018-06-11 | 431-513 | not yet reported which blocks → | Distributel | 081E | Oakbank | — |
| 2018-06-11 | 431-514 | not yet reported which blocks → | Distributel | 081E | Oakville | — |
| 2018-06-11 | 431-515 | not yet reported which blocks → | Distributel | 081E | Pilot Mound | — |
| 2018-06-08 | 431-492 | not yet reported which blocks → | Distributel | 081E | Austin | — |
| 2018-06-08 | 431-493 | not yet reported which blocks → | Distributel | 081E | Crystal City | — |
| 2018-05-08 | 431-314 | not yet reported which blocks → | Fibernetics Corporation | 464D | Oakbank | — |
| 2018-05-08 | 431-315 | not yet reported which blocks → | Fibernetics Corporation | 464D | Portage La Prairie | — |
| 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 | — |
| 2018-03-19 | 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 | — |
| 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 | — |
| 2017-12-21 | 431-489 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Winnipeg | — |
| 2017-11-15 | 431-478 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Winnipeg | — |
| 2017-10-31 | 431-388 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2017-10-31 | 431-588 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2017-10-31 | 431-688 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2017-09-26 | 431-556 | not yet reported which blocks → | TELUS Mobility | 8303 | Winnipeg | — |
| 2017-09-22 | 431-557 | not yet reported which blocks → | TELUS Mobility | 8303 | Winnipeg | — |
| 2017-09-13 | 431-295 | not yet reported which blocks → | Bell Mobility | 6574 | Virden | — |
| 2017-08-16 | 431-305 | not yet reported which blocks → | Iristel Inc. | 154E | Stonewall | — |
| 2017-08-16 | 431-807 | not yet reported which blocks → | Iristel Inc. | 154E | Winnipeg | — |
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.