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 365
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2023-06-21 | 365-740 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Stevensville | — |
| 2023-06-20 | 365-290 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Beeton | — |
| 2023-06-16 | 365-359 | not yet reported which blocks → | Videotron Ltd. | 328F | St. Catharines-Thorold | — |
| 2023-06-14 | 365-357 | not yet reported which blocks → | Videotron Ltd. | 328F | Hamilton | — |
| 2023-06-14 | 365-358 | not yet reported which blocks → | Videotron Ltd. | 328F | Oshawa | — |
| 2023-06-12 | 365-609 | not yet reported which blocks → | Iristel Inc. | 154E | Fort Erie | — |
| 2023-05-24 | 365-390 | not yet reported which blocks → | Bell Mobility | 6574 | Ajax-Pickering | — |
| 2023-05-11 | 365-286 | not yet reported which blocks → | Iristel Inc. | 154E | Kleinburg | — |
| 2023-05-11 | 365-513 | not yet reported which blocks → | Iristel Inc. | 154E | Bowmanville | — |
| 2023-05-05 | 365-379 | not yet reported which blocks → | Iristel Inc. | 154E | Markham | — |
| 2023-03-22 | 365-284 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Palgrave | — |
| 2023-03-22 | 365-528 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Schomberg | — |
| 2023-03-20 | 365-418 | not yet reported which blocks → | Bell Canada | 8051 | Maple | — |
| 2023-03-13 | 365-438 | not yet reported which blocks → | Bell Mobility | 6574 | Hamilton | — |
| 2023-02-27 | 365-912 | not yet reported which blocks → | Bell Mobility | 6574 | Hamilton | — |
| 2023-02-13 | 365-264 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Blackstock | — |
| 2023-02-13 | 365-316 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Newtonville | — |
| 2023-01-10 | 365-643 | not yet reported which blocks → | Bell Mobility | 6574 | Hamilton | — |
| 2023-01-09 | 365-496 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ancaster | — |
| 2023-01-09 | 365-497 | not yet reported which blocks → | Fibernetics Corporation | 464D | Hamilton | — |
| 2023-01-09 | 365-498 | not yet reported which blocks → | Fibernetics Corporation | 464D | Stoney Creek | — |
| 2023-01-05 | 365-639 | not yet reported which blocks → | Bell Mobility | 6574 | Hamilton | — |
| 2023-01-03 | 365-436 | not yet reported which blocks → | Bell Mobility | 6574 | Hamilton | — |
| 2022-12-05 | 365-761 | not yet reported which blocks → | Iristel Inc. | 154E | Dunnville | — |
| 2022-12-05 | 365-797 | not yet reported which blocks → | Iristel Inc. | 154E | Grimsby | — |
| 2022-11-11 | 365-348 | not yet reported which blocks → | Fibernetics Corporation | 464D | Milton | — |
| 2022-11-11 | 365-349 | not yet reported which blocks → | Fibernetics Corporation | 464D | Oakville | — |
| 2022-11-10 | 365-346 | not yet reported which blocks → | Fibernetics Corporation | 464D | Campbellville | — |
| 2022-11-10 | 365-347 | not yet reported which blocks → | Fibernetics Corporation | 464D | Georgetown | — |
| 2022-10-26 | 365-276 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Tottenham | — |
| 2022-10-19 | 365-530 | not yet reported which blocks → | Iristel Inc. | 154E | Woodbridge | — |
| 2022-10-18 | 365-283 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Hampton | — |
| 2022-10-12 | 365-356 | not yet reported which blocks → | Videotron Ltd. | 787G | Hamilton | — |
| 2022-10-12 | 365-499 | not yet reported which blocks → | Videotron Ltd. | 787G | Oshawa | — |
| 2022-10-04 | 365-341 | not yet reported which blocks → | Bell Mobility | 6574 | Brampton | — |
| 2022-10-04 | 365-378 | not yet reported which blocks → | Bell Mobility | 6574 | Hamilton | — |
| 2022-10-04 | 365-524 | not yet reported which blocks → | Videotron Ltd. | 787G | St. Catharines-Thorold | — |
| 2022-09-20 | 365-987 | not yet reported which blocks → | TELUS Mobility | 8303 | Brampton | — |
| 2022-08-25 | 365-279 | not yet reported which blocks → | Fibernetics Corporation | 464D | Clarkson | — |
| 2022-08-25 | 365-280 | not yet reported which blocks → | Fibernetics Corporation | 464D | Port Credit | — |
| 2022-08-25 | 365-281 | not yet reported which blocks → | Fibernetics Corporation | 464D | Streetsville | — |
| 2022-08-12 | 365-466 | not yet reported which blocks → | Fibernetics Corporation | 464D | Cayuga | — |
| 2022-08-12 | 365-467 | not yet reported which blocks → | Fibernetics Corporation | 464D | Dunnville | — |
| 2022-08-12 | 365-468 | not yet reported which blocks → | Fibernetics Corporation | 464D | Fisherville | — |
| 2022-08-12 | 365-469 | not yet reported which blocks → | Fibernetics Corporation | 464D | Port Robinson | — |
| 2022-08-12 | 365-470 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ridgeway | — |
| 2022-08-12 | 365-471 | not yet reported which blocks → | Fibernetics Corporation | 464D | Selkirk | — |
| 2022-08-12 | 365-472 | not yet reported which blocks → | Fibernetics Corporation | 464D | Stevensville | — |
| 2022-08-12 | 365-473 | not yet reported which blocks → | Fibernetics Corporation | 464D | Wainfleet | — |
| 2022-08-12 | 365-474 | not yet reported which blocks → | Fibernetics Corporation | 464D | Wellandport | — |
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.