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
Aug 2026
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May 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2024-02-02 | 437-564 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Toronto | — |
| 2024-02-02 | 437-565 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Toronto | — |
| 2024-01-22 | 437-734 | not yet reported which blocks → | TELUS Mobility | 8303 | Toronto | — |
| 2024-01-19 | 437-454 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2024-01-16 | 437-585 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2024-01-16 | 437-689 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2024-01-16 | 437-698 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2024-01-16 | 437-708 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2024-01-16 | 437-728 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2024-01-16 | 437-758 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Toronto | — |
| 2024-01-08 | 437-257 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2024-01-08 | 437-455 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2024-01-08 | 437-520 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2024-01-08 | 437-963 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-12-21 | 437-453 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-12-04 | 437-452 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-11-13 | 437-672 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-11-10 | 437-671 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-11-07 | 437-451 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-11-07 | 437-670 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-10-24 | 437-738 | not yet reported which blocks → | Iristel Inc. | 346J | Toronto | — |
| 2023-10-24 | 437-739 | not yet reported which blocks → | Iristel Inc. | 346J | Toronto | — |
| 2023-10-24 | 437-740 | not yet reported which blocks → | Iristel Inc. | 346J | Toronto | — |
| 2023-09-26 | 437-606 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2023-09-26 | 437-607 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2023-09-26 | 437-608 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2023-09-25 | 437-601 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2023-09-25 | 437-602 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2023-09-25 | 437-603 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2023-09-25 | 437-604 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2023-09-25 | 437-605 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2023-09-19 | 437-449 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-09-13 | 437-448 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-09-11 | 437-446 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-08-24 | 437-892 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toronto | — |
| 2023-07-27 | 437-530 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2023-07-27 | 437-531 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2023-07-27 | 437-532 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2023-07-25 | 437-523 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2023-07-25 | 437-524 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2023-07-25 | 437-525 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2023-07-25 | 437-526 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2023-07-25 | 437-527 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2023-07-25 | 437-528 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2023-07-25 | 437-529 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2023-07-20 | 437-658 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-07-17 | 437-870 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2023-07-17 | 437-871 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2023-07-17 | 437-872 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Toronto | — |
| 2023-07-17 | 437-873 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | 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.