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
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 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 |
|---|---|---|---|---|---|---|
| 2026-06-29 | 437-321 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2026-06-29 | 437-368 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2026-06-29 | 437-369 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2026-01-12 | 437-314 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2026-01-12 | 437-315 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2026-01-12 | 437-316 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2026-01-12 | 437-319 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2025-01-20 | 437-364 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2025-01-09 | 437-334 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2024-11-06 | 437-426 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2024-01-19 | 437-454 | not yet reported which blocks → | Bell Mobility | 6574 | 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 | — |
| 2023-09-19 | 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 | — |
| 2023-07-20 | 437-658 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-05-17 | 437-441 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-05-15 | 437-440 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-05-02 | 437-656 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-05-02 | 437-657 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-04-18 | 437-439 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-03-13 | 437-654 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-02-27 | 437-433 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-02-22 | 437-298 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-01-25 | 437-653 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-01-10 | 437-297 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2023-01-05 | 437-289 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-12-20 | 437-432 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-12-06 | 437-431 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-10-05 | 437-429 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-09-01 | 437-428 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-08-26 | 437-427 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-07-28 | 437-418 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-07-28 | 437-419 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-07-26 | 437-415 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-07-26 | 437-417 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-07-26 | 437-962 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-07-21 | 437-425 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-06-21 | 437-424 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-05-30 | 437-652 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2022-05-11 | 437-412 | not yet reported which blocks → | Bell Mobility | 6574 | 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.