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 519
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 |
|---|---|---|---|---|---|---|
| 2019-01-14 | 519-705 | not yet reported which blocks → | InnSysVoice Corp | 383H | London | — |
| 2019-01-14 | 519-905 | not yet reported which blocks → | InnSysVoice Corp | 383H | Guelph | — |
| 2008-10-27 | 519-300 | not yet reported which blocks → | Bell Mobility | 6574 | Windsor | — |
| 2008-07-31 | 519-804 | not yet reported which blocks → | Fibernetics Corporation | 464D | Kitchener-Waterloo | — |
| 2008-04-28 | 519-406 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Wellesley | — |
| 2008-04-28 | 519-407 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | St. Clements | — |
| 2008-04-28 | 519-408 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Plattsville | — |
| 2008-04-28 | 519-413 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | New Dundee | — |
| 2008-04-28 | 519-545 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | New Hamburg | — |
| 2008-04-28 | 519-547 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Ayr | — |
| 2008-04-28 | 519-556 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Baden | — |
| 2008-04-28 | 519-557 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Thamesford | — |
| 2008-02-26 | 519-605 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Rockwood | — |
| 2008-02-14 | 519-607 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Tilbury | — |
| 2007-11-12 | 519-900 | not yet reported which blocks → | Iristel Inc. | 154E | Brantford | — |
| 2007-08-30 | 519-800 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2007-07-18 | 519-714 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Hespeler | — |
| 2007-06-21 | 519-543 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Galt | — |
| 2007-06-21 | 519-544 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Tillsonburg | — |
| 2007-06-21 | 519-602 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Woodstock | — |
| 2007-06-21 | 519-603 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Kitchener-Waterloo | — |
| 2007-06-21 | 519-700 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Hespeler | — |
| 2007-06-21 | 519-906 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | St. Jacobs | — |
| 2007-06-21 | 519-910 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Elmira | — |
| 2007-06-21 | 519-920 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Preston | — |
| 2007-06-21 | 519-926 | not yet reported which blocks → | Execulink Telecom Inc. | 8226 | Ingersoll | — |
| 2007-06-13 | 519-600 | not yet reported which blocks → | Tuckersmith Communications Co-operative Ltd. | 277E | Seaforth | — |
| 2007-06-01 | 519-609 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Thorndale | — |
| 2007-06-01 | 519-914 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | London | — |
| 2007-06-01 | 519-916 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Windsor | — |
| 2007-05-10 | 519-915 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Windsor | — |
| 2007-05-02 | 519-904 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Kitchener-Waterloo | — |
| 2007-03-13 | 519-953 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | London | — |
| 2007-01-16 | 519-814 | not yet reported which blocks → | Mornington Communications Co-operative Ltd. | 400E | Stratford | — |
| 2007-01-16 | 519-815 | not yet reported which blocks → | Mornington Communications Co-operative Ltd. | 400E | Listowel | — |
| 2006-12-15 | 519-713 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Amherstburg | — |
| 2006-12-15 | 519-715 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Belle River | — |
| 2006-12-15 | 519-956 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Tecumseh | — |
| 2006-12-15 | 519-970 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | La Salle | — |
| 2006-11-29 | 519-812 | not yet reported which blocks → | Huron Telecommunications Co-operative Ltd. | 405E | Lucknow | — |
| 2006-11-29 | 519-912 | not yet reported which blocks → | Huron Telecommunications Co-operative Ltd. | 405E | Wingham | — |
| 2006-11-07 | 519-917 | not yet reported which blocks → | Bell Mobility | 6574 | Chatham | — |
| 2006-10-11 | 519-606 | not yet reported which blocks → | Tuckersmith Communications Co-operative Ltd. | 277E | Clinton | — |
| 2006-09-19 | 519-954 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Kitchener-Waterloo | — |
| 2006-09-05 | 519-604 | not yet reported which blocks → | Bell Mobility | 6574 | Mount Forest | — |
| 2006-09-05 | 519-704 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Sarnia | — |
| 2006-08-25 | 519-612 | not yet reported which blocks → | Huron Telecommunications Co-operative Ltd. | 405E | Goderich | — |
| 2006-07-18 | 519-601 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | London | — |
| 2006-07-04 | 519-444 | not yet reported which blocks → | Bell Mobility | 6574 | Listowel | — |
| 2006-07-04 | 519-450 | not yet reported which blocks → | Bell Mobility | 6574 | Wingham | — |
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.