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 437
New assignments by month
Sep 2026
Aug 2026
Jul 2026
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May 2026
Apr 2026
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2019-10-31 | 437-336 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-31 | 437-337 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-31 | 437-339 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-31 | 437-522 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-17 | 437-822 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-17 | 437-833 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-17 | 437-855 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-17 | 437-866 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-17 | 437-877 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-17 | 437-899 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-16 | 437-338 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-16 | 437-558 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-16 | 437-668 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-16 | 437-881 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-16 | 437-882 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-16 | 437-883 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-10-16 | 437-885 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2019-09-25 | 437-701 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2019-09-25 | 437-702 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2019-09-25 | 437-703 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2019-08-28 | 437-880 | not yet reported which blocks → | Rogers Communications Canada Inc. | 571G | Toronto | — |
| 2019-07-02 | 437-374 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2019-07-02 | 437-375 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2019-04-17 | 437-340 | not yet reported which blocks → | TELUS Mobility | 646F | Toronto | — |
| 2019-03-20 | 437-357 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-03-20 | 437-358 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-03-20 | 437-359 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-03-20 | 437-360 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-03-20 | 437-361 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-03-19 | 437-354 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-03-19 | 437-355 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-03-19 | 437-356 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-02-14 | 437-680 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-02-14 | 437-681 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-02-14 | 437-682 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-02-14 | 437-683 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-02-14 | 437-686 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-02-14 | 437-687 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2019-01-28 | 437-685 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2018-12-13 | 437-251 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2018-12-13 | 437-252 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2018-12-13 | 437-916 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Toronto | — |
| 2018-12-13 | 437-917 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Toronto | — |
| 2018-12-13 | 437-918 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Toronto | — |
| 2018-12-12 | 437-912 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Toronto | — |
| 2018-12-12 | 437-913 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Toronto | — |
| 2018-12-12 | 437-914 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Toronto | — |
| 2018-12-12 | 437-915 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Toronto | — |
| 2018-12-11 | 437-867 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2018-11-07 | 437-737 | not yet reported which blocks → | Iristel Inc. | 346J | Toronto | — |
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.