NumberResearchRecent prefix assignments
2 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, last 30 days — NPA 548
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 |
|---|---|---|---|---|---|---|
| 2023-07-27 | 548-986 | not yet reported which blocks → | Fibernetics Corporation | 464D | St. Thomas | — |
| 2023-06-26 | 548-434 | not yet reported which blocks → | Fibernetics Corporation | 464D | Owen Sound | — |
| 2023-06-21 | 548-928 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Drayton | — |
| 2023-06-21 | 548-973 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | New Dundee | — |
| 2023-06-20 | 548-296 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ohsweken | — |
| 2023-06-20 | 548-732 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St. George | — |
| 2023-06-16 | 548-389 | not yet reported which blocks → | Videotron Ltd. | 328F | Windsor | — |
| 2023-06-14 | 548-390 | not yet reported which blocks → | Videotron Ltd. | 328F | Kitchener-Waterloo | — |
| 2023-06-14 | 548-391 | not yet reported which blocks → | Videotron Ltd. | 328F | London | — |
| 2023-05-29 | 548-467 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Paris | — |
| 2023-05-19 | 548-351 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Scotland | — |
| 2023-05-19 | 548-478 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ailsa Craig | — |
| 2023-05-19 | 548-717 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Belmont | — |
| 2023-05-17 | 548-452 | not yet reported which blocks → | Fibernetics Corporation | 464D | Guelph | — |
| 2023-05-15 | 548-397 | not yet reported which blocks → | Iristel Inc. | 154E | Woodstock | — |
| 2023-05-12 | 548-293 | not yet reported which blocks → | Iristel Inc. | 154E | Walkerton | — |
| 2023-05-12 | 548-501 | not yet reported which blocks → | Iristel Inc. | 154E | Tillsonburg | — |
| 2023-05-12 | 548-582 | not yet reported which blocks → | Iristel Inc. | 154E | Sarnia | — |
| 2023-05-12 | 548-586 | not yet reported which blocks → | Iristel Inc. | 154E | St. Thomas | — |
| 2023-05-11 | 548-290 | not yet reported which blocks → | Iristel Inc. | 154E | Durham | — |
| 2023-05-11 | 548-325 | not yet reported which blocks → | Iristel Inc. | 154E | Listowel | — |
| 2023-05-11 | 548-406 | not yet reported which blocks → | Iristel Inc. | 154E | Essex | — |
| 2023-05-11 | 548-505 | not yet reported which blocks → | Iristel Inc. | 154E | Owen Sound | — |
| 2023-05-11 | 548-584 | not yet reported which blocks → | Iristel Inc. | 154E | Orangeville | — |
| 2023-03-21 | 548-289 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Bothwell | — |
| 2023-03-21 | 548-326 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Dresden | — |
| 2023-03-21 | 548-507 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Highgate | — |
| 2023-03-16 | 548-508 | not yet reported which blocks → | IXICA Communications Inc. | 812H | London | — |
| 2023-03-06 | 548-514 | not yet reported which blocks → | Fibernetics Corporation | 464D | La Salle | — |
| 2023-03-01 | 548-512 | not yet reported which blocks → | Fibernetics Corporation | 464D | Amherstburg | — |
| 2023-03-01 | 548-513 | not yet reported which blocks → | Fibernetics Corporation | 464D | Kingsville | — |
| 2023-03-01 | 548-515 | not yet reported which blocks → | Fibernetics Corporation | 464D | Leamington | — |
| 2023-03-01 | 548-516 | not yet reported which blocks → | Fibernetics Corporation | 464D | Tecumseh | — |
| 2023-03-01 | 548-517 | not yet reported which blocks → | Fibernetics Corporation | 464D | Windsor | — |
| 2023-02-15 | 548-286 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Burford | — |
| 2023-02-15 | 548-319 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lynden | — |
| 2023-02-15 | 548-642 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Mount Pleasant | — |
| 2023-02-08 | 548-677 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Arthur | — |
| 2023-02-08 | 548-707 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Palmerston | — |
| 2023-02-08 | 548-828 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Listowel | — |
| 2023-02-08 | 548-933 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Linwood | — |
| 2023-02-08 | 548-955 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Drayton | — |
| 2023-01-26 | 548-380 | not yet reported which blocks → | Fibernetics Corporation | 464D | Acton | — |
| 2023-01-26 | 548-381 | not yet reported which blocks → | Fibernetics Corporation | 464D | Rockwood | — |
| 2023-01-23 | 548-323 | not yet reported which blocks → | Bell Mobility | 6574 | Port Elgin | — |
| 2022-11-10 | 548-379 | not yet reported which blocks → | Fibernetics Corporation | 464D | Paris | — |
| 2022-10-21 | 548-922 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Guelph | — |
| 2022-10-20 | 548-554 | not yet reported which blocks → | Iristel Inc. | 154E | Aylmer | — |
| 2022-10-19 | 548-410 | not yet reported which blocks → | Iristel Inc. | 154E | Goderich | — |
| 2022-10-19 | 548-829 | not yet reported which blocks → | Iristel Inc. | 154E | Wingham | — |
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.