NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2012-03-28 | 289-857 | not yet reported which blocks → | Fibernetics Corporation | 464D | Thornhill | — |
| 2012-03-28 | 289-861 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Burlington | — |
| 2012-03-28 | 289-862 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Milton | — |
| 2012-03-28 | 289-863 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Oakville | — |
| 2012-03-23 | 289-536 | not yet reported which blocks → | Iristel Inc. | 154E | Woodbridge | — |
| 2012-03-23 | 289-914 | not yet reported which blocks → | Iristel Inc. | 154E | Streetsville | — |
| 2012-03-23 | 289-985 | not yet reported which blocks → | Iristel Inc. | 154E | Whitby | — |
| 2012-03-22 | 289-903 | not yet reported which blocks → | Iristel Inc. | 154E | Newmarket | — |
| 2012-03-22 | 289-917 | not yet reported which blocks → | Iristel Inc. | 154E | Maple | — |
| 2012-03-21 | 289-498 | not yet reported which blocks → | Fibernetics Corporation | 464D | Brampton | — |
| 2012-03-21 | 289-904 | not yet reported which blocks → | Iristel Inc. | 154E | Malton | — |
| 2012-03-21 | 289-907 | not yet reported which blocks → | Iristel Inc. | 154E | King City | — |
| 2012-03-19 | 289-306 | not yet reported which blocks → | Iristel Inc. | 154E | Markham | — |
| 2012-03-19 | 289-796 | not yet reported which blocks → | Iristel Inc. | 154E | Aurora | — |
| 2012-03-15 | 289-378 | not yet reported which blocks → | Fibernetics Corporation | 464D | Markham | — |
| 2012-03-15 | 289-379 | not yet reported which blocks → | Fibernetics Corporation | 464D | Richmond Hill | — |
| 2012-03-06 | 289-499 | not yet reported which blocks → | Fibernetics Corporation | 464D | Brampton | — |
| 2012-03-01 | 289-723 | not yet reported which blocks → | Iristel Inc. | 154E | St. Catharines-Thorold | — |
| 2012-02-27 | 289-778 | not yet reported which blocks → | Iristel Inc. | 154E | Hamilton | — |
| 2012-02-23 | 289-401 | not yet reported which blocks → | Iristel Inc. | 154E | Brampton | — |
| 2012-02-14 | 289-460 | not yet reported which blocks → | Iristel Inc. | 154E | Ajax-Pickering | — |
| 2012-02-14 | 289-670 | not yet reported which blocks → | Iristel Inc. | 154E | Milton | — |
| 2012-01-20 | 289-309 | not yet reported which blocks → | Fibernetics Corporation | 464D | Hamilton | — |
| 2012-01-19 | 289-312 | not yet reported which blocks → | Iristel Inc. | 154E | Oshawa | — |
| 2012-01-17 | 289-829 | not yet reported which blocks → | Fido Solutions Inc. | 8820 | Cobourg | — |
| 2011-12-22 | 289-816 | not yet reported which blocks → | Iristel Inc. | 154E | Burlington | — |
| 2011-12-21 | 289-779 | not yet reported which blocks → | Iristel Inc. | 154E | Hamilton | — |
| 2011-12-16 | 289-302 | not yet reported which blocks → | Iristel Inc. | 154E | Niagara Falls | — |
| 2011-12-13 | 289-827 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Hamilton | — |
| 2011-12-09 | 289-435 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Cobourg | — |
| 2011-12-09 | 289-436 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Port Hope | — |
| 2011-12-09 | 289-877 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Hamilton | — |
| 2011-12-09 | 289-920 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Hamilton | — |
| 2011-10-28 | 289-675 | not yet reported which blocks → | TELUS Mobility | 8303 | Oshawa | — |
| 2011-10-28 | 289-691 | not yet reported which blocks → | TELUS Mobility | 8303 | Cobourg | — |
| 2011-10-28 | 289-974 | not yet reported which blocks → | Distributel | 082E | St. Catharines-Thorold | — |
| 2011-10-14 | 289-735 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Ancaster | — |
| 2011-10-14 | 289-736 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Cayuga | — |
| 2011-10-14 | 289-737 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Dundas | — |
| 2011-10-14 | 289-738 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Dunnville | — |
| 2011-10-11 | 289-786 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | St. Catharines-Thorold | — |
| 2011-10-04 | 289-819 | not yet reported which blocks → | Iristel Inc. | 154E | Richmond Hill | — |
| 2011-09-22 | 289-815 | not yet reported which blocks → | Iristel Inc. | 154E | Oakville | — |
| 2011-09-16 | 289-455 | not yet reported which blocks → | TELUS Mobility | 8303 | Grimsby | — |
| 2011-09-13 | 289-698 | not yet reported which blocks → | TELUS Mobility | 8303 | Hamilton | — |
| 2011-08-23 | 289-243 | not yet reported which blocks → | Distributel | 082E | Oakville | — |
| 2011-08-23 | 289-263 | not yet reported which blocks → | Distributel | 082E | Hamilton | — |
| 2011-08-15 | 289-756 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Binbrook | — |
| 2011-08-15 | 289-757 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Caledonia | — |
| 2011-08-15 | 289-758 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Hagersville | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.