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
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2018-01-02 | 437-388 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2018-01-02 | 437-488 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2018-01-02 | 437-688 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2018-01-02 | 437-788 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-09-22 | 437-637 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2017-09-13 | 437-377 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Toronto | — |
| 2017-08-02 | 437-550 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2017-08-02 | 437-850 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2017-07-20 | 437-922 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-07-20 | 437-925 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-07-20 | 437-928 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-07-20 | 437-929 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-07-20 | 437-980 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-07-19 | 437-770 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-07-19 | 437-771 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-07-19 | 437-772 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-07-19 | 437-774 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-06-15 | 437-700 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2017-04-20 | 437-773 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-04-20 | 437-775 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-04-20 | 437-776 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-04-20 | 437-778 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-04-20 | 437-779 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-04-20 | 437-990 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2017-03-31 | 437-372 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2017-03-31 | 437-373 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2016-09-21 | 437-200 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2016-09-21 | 437-201 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2016-09-21 | 437-202 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2016-09-21 | 437-203 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2016-09-21 | 437-204 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2016-09-21 | 437-205 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2016-09-21 | 437-206 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2016-09-21 | 437-207 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2016-09-21 | 437-208 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2016-09-21 | 437-209 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2016-09-20 | 437-981 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2016-09-20 | 437-982 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2016-09-20 | 437-983 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2016-09-20 | 437-984 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2016-09-20 | 437-985 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2016-09-20 | 437-986 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2016-09-20 | 437-987 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2016-09-20 | 437-988 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2016-09-20 | 437-989 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2016-08-11 | 437-991 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-08-11 | 437-992 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-08-11 | 437-993 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-08-11 | 437-994 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2016-08-11 | 437-995 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | 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.