NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026
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 905
New assignments by month
Sep 2026
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Dec 2025
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2004-12-10 | 905-503 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Aurora | — |
| 2004-12-10 | 905-533 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Bolton | — |
| 2004-12-10 | 905-534 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Gormley | — |
| 2004-12-10 | 905-535 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Keswick | — |
| 2004-12-10 | 905-539 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | King City | — |
| 2004-12-10 | 905-552 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Kleinburg | — |
| 2004-12-09 | 905-583 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Palgrave | — |
| 2004-12-09 | 905-589 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Queensville | — |
| 2004-12-09 | 905-590 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Schomberg | — |
| 2004-12-09 | 905-591 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Stouffville | — |
| 2004-12-09 | 905-597 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Thornhill | — |
| 2004-12-09 | 905-604 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Unionville | — |
| 2004-12-09 | 905-605 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Woodbridge | — |
| 2004-12-08 | 905-553 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Maple | — |
| 2004-12-08 | 905-554 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Markham | — |
| 2004-12-08 | 905-557 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Mount Albert | — |
| 2004-12-08 | 905-558 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Nobleton | — |
| 2004-12-08 | 905-596 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Sutton | — |
| 2004-09-27 | 905-230 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Brampton | — |
| 2004-09-27 | 905-232 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Cooksville | — |
| 2004-09-27 | 905-237 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Richmond Hill | — |
| 2004-09-27 | 905-239 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Ajax-Pickering | — |
| 2004-09-27 | 905-240 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Oshawa | — |
| 2004-05-19 | 905-910 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Markham | — |
| 2004-05-19 | 905-918 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Richmond Hill | — |
| 2004-03-15 | 905-235 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Newmarket | — |
| 2003-12-01 | 905-241 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Cooksville | — |
| 2003-10-01 | 905-231 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Ajax-Pickering | — |
| 2003-10-01 | 905-250 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | South Pickering | — |
| 2003-10-01 | 905-486 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Port Credit | — |
| 2003-10-01 | 905-556 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Whitby | — |
| 2003-10-01 | 905-919 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Clarkson | — |
| 2003-03-14 | 905-296 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Hamilton | — |
| 2003-03-14 | 905-488 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Brampton | — |
| 2002-03-14 | 905-901 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Oakville | — |
| 2002-01-17 | 905-592 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Burlington | — |
| 2002-01-17 | 905-593 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Streetsville | — |
| 2002-01-17 | 905-594 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Stoney Creek | — |
| 2001-10-01 | 905-256 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Malton | — |
| 2001-09-07 | 905-228 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | St. Catharines-Thorold | — |
| 2001-01-11 | 905-307 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Unionville | — |
| 2000-12-08 | 905-203 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Milton | — |
| 2000-12-08 | 905-204 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Castlemore | — |
| 2000-08-25 | 905-224 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Richmond Hill | — |
| 2000-07-12 | 905-205 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Markham | — |
| 2000-06-30 | 905-369 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Streetsville | — |
| 2000-06-30 | 905-422 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | South Pickering | — |
| 2000-06-30 | 905-618 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Oakville | — |
| 2000-06-19 | 905-340 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Burlington | — |
| 2000-06-19 | 905-345 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | St. Catharines-Thorold | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.