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
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2024-05-30 | 365-612 | not yet reported which blocks → | Iristel Inc. | 154E | Fort Erie | — |
| 2024-05-30 | 365-760 | not yet reported which blocks → | Iristel Inc. | 154E | Dunnville | — |
| 2024-05-03 | 365-904 | not yet reported which blocks → | Iristel Inc. | 154E | Malton | — |
| 2024-05-01 | 365-648 | not yet reported which blocks → | Iristel Inc. | 154E | Claremont | — |
| 2024-05-01 | 365-902 | not yet reported which blocks → | Iristel Inc. | 154E | Ancaster | — |
| 2024-03-05 | 365-461 | not yet reported which blocks → | Iristel Inc. | 154E | Markham | — |
| 2024-03-05 | 365-462 | not yet reported which blocks → | Iristel Inc. | 154E | Markham | — |
| 2024-03-05 | 365-463 | not yet reported which blocks → | Iristel Inc. | 154E | Markham | — |
| 2024-02-22 | 365-830 | not yet reported which blocks → | Iristel Inc. | 154E | Aurora | — |
| 2024-02-22 | 365-831 | not yet reported which blocks → | Iristel Inc. | 154E | Aurora | — |
| 2024-02-22 | 365-832 | not yet reported which blocks → | Iristel Inc. | 154E | Aurora | — |
| 2024-02-13 | 365-396 | not yet reported which blocks → | Iristel Inc. | 154E | Ajax-Pickering | — |
| 2024-02-13 | 365-397 | not yet reported which blocks → | Iristel Inc. | 154E | Ajax-Pickering | — |
| 2024-01-11 | 365-344 | not yet reported which blocks → | Bell Mobility | 6574 | Aurora | — |
| 2024-01-04 | 365-963 | not yet reported which blocks → | Videotron Ltd. | 787G | Brampton | — |
| 2023-12-18 | 365-384 | not yet reported which blocks → | Bell Mobility | 6574 | Hamilton | — |
| 2023-10-27 | 365-488 | not yet reported which blocks → | Fibernetics Corporation | 464D | Brampton | — |
| 2023-10-27 | 365-489 | not yet reported which blocks → | Fibernetics Corporation | 464D | Castlemore | — |
| 2023-10-27 | 365-490 | not yet reported which blocks → | Fibernetics Corporation | 464D | Snelgrove | — |
| 2023-09-29 | 365-293 | not yet reported which blocks → | Videotron Ltd. | 328F | Brampton | — |
| 2023-09-29 | 365-386 | not yet reported which blocks → | Videotron Ltd. | 328F | Newmarket | — |
| 2023-09-13 | 365-480 | not yet reported which blocks → | Iristel Inc. | 154E | Markham | — |
| 2023-09-13 | 365-481 | not yet reported which blocks → | Iristel Inc. | 154E | Markham | — |
| 2023-09-13 | 365-482 | not yet reported which blocks → | Iristel Inc. | 154E | Markham | — |
| 2023-09-13 | 365-483 | not yet reported which blocks → | Iristel Inc. | 154E | Markham | — |
| 2023-09-13 | 365-484 | not yet reported which blocks → | Iristel Inc. | 154E | Markham | — |
| 2023-09-11 | 365-391 | not yet reported which blocks → | Iristel Inc. | 154E | Oshawa | — |
| 2023-09-11 | 365-392 | not yet reported which blocks → | Iristel Inc. | 154E | Oshawa | — |
| 2023-09-11 | 365-393 | not yet reported which blocks → | Iristel Inc. | 154E | Oshawa | — |
| 2023-09-11 | 365-394 | not yet reported which blocks → | Iristel Inc. | 154E | Oshawa | — |
| 2023-09-11 | 365-780 | not yet reported which blocks → | Iristel Inc. | 154E | Thornhill | — |
| 2023-09-11 | 365-781 | not yet reported which blocks → | Iristel Inc. | 154E | Thornhill | — |
| 2023-09-11 | 365-782 | not yet reported which blocks → | Iristel Inc. | 154E | Thornhill | — |
| 2023-09-11 | 365-783 | not yet reported which blocks → | Iristel Inc. | 154E | Thornhill | — |
| 2023-09-11 | 365-819 | not yet reported which blocks → | Iristel Inc. | 154E | Richmond Hill | — |
| 2023-09-11 | 365-820 | not yet reported which blocks → | Iristel Inc. | 154E | Richmond Hill | — |
| 2023-09-11 | 365-821 | not yet reported which blocks → | Iristel Inc. | 154E | Richmond Hill | — |
| 2023-09-11 | 365-826 | not yet reported which blocks → | Iristel Inc. | 154E | Richmond Hill | — |
| 2023-09-07 | 365-351 | not yet reported which blocks → | Videotron Ltd. | 328F | Oakville | — |
| 2023-09-06 | 365-981 | not yet reported which blocks → | Fibernetics Corporation | 464D | Burlington | — |
| 2023-08-31 | 365-974 | not yet reported which blocks → | Fibernetics Corporation | 464D | St. Catharines-Thorold | — |
| 2023-08-25 | 365-679 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bowmanville | — |
| 2023-08-09 | 365-982 | not yet reported which blocks → | Fibernetics Corporation | 464D | Binbrook | — |
| 2023-08-09 | 365-983 | not yet reported which blocks → | Fibernetics Corporation | 464D | Dundas | — |
| 2023-08-09 | 365-984 | not yet reported which blocks → | Fibernetics Corporation | 464D | Grimsby | — |
| 2023-08-09 | 365-985 | not yet reported which blocks → | Fibernetics Corporation | 464D | West Lincoln | — |
| 2023-08-09 | 365-986 | not yet reported which blocks → | Fibernetics Corporation | 464D | Winona | — |
| 2023-07-18 | 365-439 | not yet reported which blocks → | Bell Mobility | 6574 | Hamilton | — |
| 2023-06-21 | 365-342 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Cayuga | — |
| 2023-06-21 | 365-518 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Port Robinson | — |
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.