NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
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 |
|---|---|---|---|---|---|---|
| 2022-11-15 | 639-764 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Delisle | — |
| 2022-11-15 | 639-816 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Dinsmore | — |
| 2022-11-15 | 639-817 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Duck Lake | — |
| 2022-11-15 | 639-841 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Hafford | — |
| 2022-11-15 | 639-859 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Dundurn | — |
| 2022-11-15 | 639-910 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Hague | — |
| 2022-11-15 | 639-951 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Hanley | — |
| 2022-11-15 | 639-952 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Hepburn | — |
| 2022-11-14 | 639-403 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Aberdeen | — |
| 2022-11-14 | 639-430 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Allan | — |
| 2022-11-14 | 639-458 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Alvena | — |
| 2022-11-14 | 639-459 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Asquith | — |
| 2022-11-14 | 639-524 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Beechy | — |
| 2022-11-14 | 639-526 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Biggar | — |
| 2022-11-14 | 639-527 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Blaine Lake | — |
| 2022-11-14 | 639-652 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Borden | — |
| 2022-11-14 | 639-666 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Bruno | — |
| 2022-11-14 | 639-697 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Colonsay | — |
| 2022-11-14 | 639-698 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Cudworth | — |
| 2022-11-14 | 639-763 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Dalmeny | — |
| 2022-11-10 | 639-478 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Saskatoon | — |
| 2022-06-30 | 639-852 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Davidson | — |
| 2022-06-30 | 639-853 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Fort Qu'Appelle | — |
| 2022-06-30 | 639-854 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Kipling | — |
| 2022-01-18 | 639-569 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Balgonie | — |
| 2022-01-18 | 639-570 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Regina Beach | — |
| 2021-11-05 | 639-824 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Moosomin | — |
| 2021-11-05 | 639-825 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Indian Head | — |
| 2021-11-05 | 639-826 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lumsden | — |
| 2021-11-05 | 639-827 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Grenfell | — |
| 2019-08-21 | 639-477 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Regina | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.