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 289
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
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Jan 2026
Dec 2025
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2007-08-30 | 289-635 | not yet reported which blocks → | Fibernetics Corporation | 464D | Burlington | — |
| 2007-08-30 | 289-637 | not yet reported which blocks → | Fibernetics Corporation | 464D | Richmond Hill | — |
| 2007-08-16 | 289-218 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Oakville | — |
| 2007-08-14 | 289-200 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Ajax-Pickering | — |
| 2007-08-14 | 289-208 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Burlington | — |
| 2007-08-14 | 289-209 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Dunnville | — |
| 2007-08-09 | 289-355 | not yet reported which blocks → | Bell Mobility | 6574 | Oshawa | — |
| 2007-08-09 | 289-388 | not yet reported which blocks → | Bell Mobility | 6574 | Ajax-Pickering | — |
| 2007-08-09 | 289-441 | not yet reported which blocks → | Bell Mobility | 6574 | Hamilton | — |
| 2007-08-09 | 289-838 | not yet reported which blocks → | Bell Mobility | 6574 | Oakville | — |
| 2007-07-18 | 289-422 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Ajax-Pickering | — |
| 2007-07-13 | 289-438 | not yet reported which blocks → | Fibernetics Corporation | 464D | St. Catharines-Thorold | — |
| 2007-07-13 | 289-639 | not yet reported which blocks → | Fibernetics Corporation | 464D | Hamilton | — |
| 2007-06-28 | 289-341 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Niagara Falls | — |
| 2007-06-13 | 289-424 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Binbrook | — |
| 2007-06-04 | 289-464 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Bradford | — |
| 2007-05-23 | 289-371 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Woodbridge | — |
| 2007-05-23 | 289-372 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Ajax-Pickering | — |
| 2007-05-23 | 289-373 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Clarkson | — |
| 2007-05-17 | 289-465 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Mount Albert | — |
| 2007-03-09 | 289-398 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | St. Catharines-Thorold | — |
| 2007-02-06 | 289-322 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Fort Erie | — |
| 2007-02-06 | 289-332 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Dunnville | — |
| 2007-02-06 | 289-894 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Aurora | — |
| 2007-02-01 | 289-394 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Uxbridge | — |
| 2007-02-01 | 289-823 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Welland | — |
| 2007-02-01 | 289-890 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Georgetown | — |
| 2007-01-23 | 289-325 | not yet reported which blocks → | Bell Mobility | 6574 | Brampton | — |
| 2007-01-23 | 289-396 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Hamilton | — |
| 2007-01-09 | 289-391 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Hamilton | — |
| 2006-12-28 | 289-220 | not yet reported which blocks → | Fibernetics Corporation | 464D | Whitby | — |
| 2006-12-28 | 289-222 | not yet reported which blocks → | Fibernetics Corporation | 464D | Oshawa | — |
| 2006-12-28 | 289-223 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bowmanville | — |
| 2006-12-28 | 289-224 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ajax-Pickering | — |
| 2006-12-28 | 289-225 | not yet reported which blocks → | Fibernetics Corporation | 464D | Port Perry | — |
| 2006-12-28 | 289-227 | not yet reported which blocks → | Fibernetics Corporation | 464D | Brooklin | — |
| 2006-12-28 | 289-229 | not yet reported which blocks → | Fibernetics Corporation | 464D | South Pickering | — |
| 2006-12-21 | 289-425 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Mount Hope | — |
| 2006-12-21 | 289-668 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | St. Catharines-Thorold | — |
| 2006-11-27 | 289-313 | not yet reported which blocks → | Bell Canada | 8051 | Burlington | — |
| 2006-11-02 | 289-839 | not yet reported which blocks → | TELUS Mobility | 8303 | Georgetown | — |
| 2006-10-18 | 289-338 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Newmarket | — |
| 2006-10-16 | 289-252 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Cobourg | — |
| 2006-09-26 | 289-315 | not yet reported which blocks → | Distributel | 082E | Ajax-Pickering | — |
| 2006-09-26 | 289-316 | not yet reported which blocks → | Distributel | 082E | Oshawa | — |
| 2006-09-18 | 289-317 | not yet reported which blocks → | Distributel | 082E | Richmond Hill | — |
| 2006-09-18 | 289-318 | not yet reported which blocks → | Distributel | 082E | Schomberg | — |
| 2006-09-18 | 289-319 | not yet reported which blocks → | Distributel | 082E | Newmarket | — |
| 2006-09-15 | 289-232 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Cooksville | — |
| 2006-09-15 | 289-240 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Oshawa | — |
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.