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
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2005-10-18 | 519-559 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Mount Brydges | — |
| 2005-10-05 | 519-390 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | New Hamburg | — |
| 2005-10-05 | 519-391 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | New Dundee | — |
| 2005-10-05 | 519-394 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Ayr | — |
| 2005-10-05 | 519-400 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Guelph | — |
| 2005-10-05 | 519-500 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Kitchener-Waterloo | — |
| 2005-09-15 | 519-918 | not yet reported which blocks → | TELUS Mobility | 8303 | Sarnia | — |
| 2005-08-17 | 519-200 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | London | — |
| 2005-08-15 | 519-403 | not yet reported which blocks → | Bell Mobility | 6574 | Tillsonburg | — |
| 2005-08-15 | 519-617 | not yet reported which blocks → | TELUS Mobility | 8303 | London | — |
| 2005-08-10 | 519-402 | not yet reported which blocks → | Bell Mobility | 6574 | Sarnia | — |
| 2005-07-26 | 519-614 | not yet reported which blocks → | Bell Mobility | 6574 | London | — |
| 2005-07-26 | 519-994 | not yet reported which blocks → | Bell Mobility | 6574 | Guelph | — |
| 2005-07-20 | 519-309 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Brantford | — |
| 2005-07-14 | 519-306 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Shelburne | — |
| 2005-07-14 | 519-307 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Orangeville | — |
| 2005-07-14 | 519-308 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Hillsburgh | — |
| 2005-07-14 | 519-315 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Erin | — |
| 2005-07-14 | 519-316 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Caledon | — |
| 2005-06-30 | 519-305 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Stratford | — |
| 2005-06-21 | 519-290 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Woodstock | — |
| 2005-06-21 | 519-295 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Thamesford | — |
| 2005-06-21 | 519-302 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Paris | — |
| 2005-06-21 | 519-303 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Ingersoll | — |
| 2005-06-21 | 519-304 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Brantford | — |
| 2005-06-14 | 519-219 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Preston | — |
| 2005-06-14 | 519-260 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Hespeler | — |
| 2005-06-14 | 519-265 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Guelph | — |
| 2005-06-14 | 519-267 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Galt | — |
| 2005-05-30 | 519-207 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | St. Thomas | — |
| 2005-05-27 | 519-205 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Strathroy | — |
| 2005-05-27 | 519-206 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | St. Jacobs | — |
| 2005-05-27 | 519-208 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Kitchener-Waterloo | — |
| 2005-05-27 | 519-210 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Elmira | — |
| 2005-05-27 | 519-213 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Breslau | — |
| 2005-05-27 | 519-214 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Baden | — |
| 2005-05-27 | 519-279 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Kitchener-Waterloo | — |
| 2005-05-26 | 519-202 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Dorchester | — |
| 2005-05-26 | 519-203 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Lambeth | — |
| 2005-05-26 | 519-204 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | London | — |
| 2005-05-09 | 519-997 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Windsor | — |
| 2005-04-04 | 519-516 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Brantford | — |
| 2005-03-24 | 519-552 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | London | — |
| 2005-03-24 | 519-553 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Guelph | — |
| 2005-03-24 | 519-554 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 8377 | Kitchener-Waterloo | — |
| 2005-03-03 | 519-506 | not yet reported which blocks → | Wightman Communications Ltd. | 138D | Hanover | — |
| 2005-03-03 | 519-507 | not yet reported which blocks → | Wightman Communications Ltd. | 138D | Walkerton | — |
| 2005-03-03 | 519-508 | not yet reported which blocks → | Wightman Communications Ltd. | 138D | Stratford | — |
| 2005-03-03 | 519-509 | not yet reported which blocks → | Wightman Communications Ltd. | 138D | Mount Forest | — |
| 2005-03-03 | 519-510 | not yet reported which blocks → | Wightman Communications Ltd. | 138D | Harriston | — |
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.