NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2016-08-11 | 437-996 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-08-11 | 437-997 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-08-11 | 437-998 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-04-11 | 437-537 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2016-03-18 | 437-300 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-03-18 | 437-301 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-03-18 | 437-302 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-03-18 | 437-303 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-03-18 | 437-304 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-03-18 | 437-305 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-03-18 | 437-306 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-03-18 | 437-307 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-03-18 | 437-308 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-03-18 | 437-309 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-02-19 | 437-371 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2016-01-28 | 437-317 | not yet reported which blocks → | Distributel | 082E | Toronto | — |
| 2015-12-02 | 437-370 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2015-04-02 | 437-351 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2015-04-02 | 437-352 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2015-04-02 | 437-353 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2014-11-14 | 437-346 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2014-11-14 | 437-347 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2014-11-14 | 437-348 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2014-11-14 | 437-349 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2014-11-14 | 437-350 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2014-08-22 | 437-826 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Toronto | — |
| 2014-08-22 | 437-828 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Toronto | — |
| 2014-06-27 | 437-344 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2014-04-10 | 437-540 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2014-04-10 | 437-588 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2014-03-13 | 437-405 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2014-03-13 | 437-406 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2014-03-13 | 437-407 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2014-03-13 | 437-408 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2014-03-13 | 437-409 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2014-03-12 | 437-400 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2014-03-12 | 437-401 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2014-03-12 | 437-402 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2014-03-12 | 437-403 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2014-03-12 | 437-404 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2014-01-24 | 437-345 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2013-12-03 | 437-886 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2013-11-12 | 437-333 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2013-11-12 | 437-777 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2013-11-12 | 437-999 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2013-09-16 | 437-889 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2013-06-14 | 437-887 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2013-04-30 | 437-580 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2013-03-13 | 437-836 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Toronto | — |
| 2013-03-08 | 437-222 | not yet reported which blocks → | Beanfield Technologies Inc. | 575G | Toronto | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.