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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2021-03-03 | 431-612 | not yet reported which blocks → | MTS Inc. | 8088 | 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 | — |
| 2019-08-22 | 431-601 | not yet reported which blocks → | MTS Inc. | 8088 | Winnipeg | — |
| 2014-10-09 | 431-200 | not yet reported which blocks → | MTS Inc. | 991B | Winnipeg | — |
| 2014-10-09 | 431-201 | not yet reported which blocks → | MTS Inc. | 991B | Snow Lake | — |
| 2014-06-18 | 431-274 | not yet reported which blocks → | MTS Inc. | 991B | Split Lake | — |
| 2013-06-04 | 431-234 | not yet reported which blocks → | MTS Inc. | 991B | Killarney | — |
| 2013-06-04 | 431-235 | not yet reported which blocks → | MTS Inc. | 991B | Hamiota | — |
| 2013-06-04 | 431-236 | not yet reported which blocks → | MTS Inc. | 991B | Deloraine | — |
| 2013-05-10 | 431-282 | not yet reported which blocks → | MTS Inc. | 991B | Strathclair | — |
| 2013-05-10 | 431-283 | not yet reported which blocks → | MTS Inc. | 991B | Riverton | — |
| 2013-05-10 | 431-284 | not yet reported which blocks → | MTS Inc. | 991B | Manitou | — |
| 2013-05-10 | 431-285 | not yet reported which blocks → | MTS Inc. | 991B | Gillam | — |
| 2013-04-10 | 431-233 | not yet reported which blocks → | MTS Inc. | 991B | Ste. Rose du Lac | — |
| 2013-04-03 | 431-321 | not yet reported which blocks → | MTS Inc. | 991B | Clear Lake | — |
| 2013-04-02 | 431-231 | not yet reported which blocks → | MTS Inc. | 991B | Oxford House | — |
| 2013-04-02 | 431-232 | not yet reported which blocks → | MTS Inc. | 991B | Churchill | — |
| 2013-03-08 | 431-281 | not yet reported which blocks → | MTS Inc. | 991B | Swan River | — |
| 2013-03-08 | 431-641 | not yet reported which blocks → | MTS Inc. | 991B | Gimli | — |
| 2013-02-12 | 431-229 | not yet reported which blocks → | MTS Inc. | 991B | The Pas | — |
| 2013-02-12 | 431-230 | not yet reported which blocks → | MTS Inc. | 991B | Cross Lake | — |
| 2012-09-25 | 431-226 | not yet reported which blocks → | MTS Inc. | 991B | Bissett | — |
| 2012-09-25 | 431-227 | not yet reported which blocks → | MTS Inc. | 991B | Easterville | — |
| 2012-09-25 | 431-228 | not yet reported which blocks → | MTS Inc. | 991B | Grand Beach | — |
| 2012-09-07 | 431-225 | not yet reported which blocks → | MTS Inc. | 991B | Holland | — |
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.