NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2021-12-21 | 365-771 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Winona | — |
| 2021-12-16 | 365-966 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Burlington | — |
| 2021-11-22 | 365-669 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Blackstock | — |
| 2020-12-18 | 365-776 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Waterdown | — |
| 2019-11-18 | 365-533 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Uxbridge | — |
| 2019-11-18 | 365-770 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Port Perry | — |
| 2019-09-18 | 365-898 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Oakville | — |
| 2019-03-06 | 365-558 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Milton | — |
| 2018-09-06 | 365-268 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Newmarket | — |
| 2018-08-02 | 365-230 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Brampton | — |
| 2018-08-02 | 365-231 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Brampton | — |
| 2017-12-04 | 365-887 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Richmond Hill | — |
| 2017-11-27 | 365-220 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Streetsville | — |
| 2017-11-27 | 365-288 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Cooksville | — |
| 2017-11-27 | 365-388 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Maple | — |
| 2017-11-27 | 365-597 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Thornhill | — |
| 2017-11-27 | 365-608 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Unionville | — |
| 2017-11-27 | 365-788 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Brampton | — |
| 2017-11-27 | 365-881 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Oshawa | — |
| 2017-11-27 | 365-988 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Ajax-Pickering | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.