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 |
|---|---|---|---|---|---|---|
| 2024-09-30 | 548-587 | not yet reported which blocks → | Iristel Inc. | 154E | Orangeville | — |
| 2024-09-26 | 548-327 | not yet reported which blocks → | Iristel Inc. | 154E | Listowel | — |
| 2024-09-24 | 548-762 | not yet reported which blocks → | Iristel Inc. | 154E | Guelph | — |
| 2024-09-18 | 548-291 | not yet reported which blocks → | Iristel Inc. | 154E | Durham | — |
| 2024-09-18 | 548-407 | not yet reported which blocks → | Iristel Inc. | 154E | Essex | — |
| 2024-09-06 | 548-978 | not yet reported which blocks → | Fibernetics Corporation | 464D | Orangeville | — |
| 2024-09-04 | 548-433 | not yet reported which blocks → | Fibernetics Corporation | 464D | Goderich | — |
| 2024-09-04 | 548-797 | not yet reported which blocks → | Iristel Inc. | 154E | Chatham | — |
| 2024-07-25 | 548-849 | not yet reported which blocks → | Mornington Communications Co-operative Ltd. | 400E | New Hamburg | — |
| 2024-05-03 | 548-581 | not yet reported which blocks → | Iristel Inc. | 154E | Sarnia | — |
| 2024-03-20 | 548-502 | not yet reported which blocks → | Videotron Ltd. | 383F | Simcoe | — |
| 2024-03-20 | 548-504 | not yet reported which blocks → | Videotron Ltd. | 383F | Sarnia | — |
| 2024-03-19 | 548-503 | not yet reported which blocks → | Videotron Ltd. | 383F | Orangeville | — |
| 2024-03-01 | 548-697 | not yet reported which blocks → | Iristel Inc. | 154E | London | — |
| 2024-03-01 | 548-698 | not yet reported which blocks → | Iristel Inc. | 154E | London | — |
| 2024-01-11 | 548-350 | not yet reported which blocks → | Bell Mobility | 6574 | Kitchener-Waterloo | — |
| 2024-01-09 | 548-956 | not yet reported which blocks → | Fibernetics Corporation | 464D | Galt | — |
| 2024-01-09 | 548-957 | not yet reported which blocks → | Fibernetics Corporation | 464D | Hespeler | — |
| 2024-01-09 | 548-972 | not yet reported which blocks → | Fibernetics Corporation | 464D | Clinton | — |
| 2024-01-05 | 548-498 | not yet reported which blocks → | Videotron Ltd. | 787G | Kitchener-Waterloo | — |
| 2023-10-24 | 548-324 | not yet reported which blocks → | Gosfield North Communication Co-operative Ltd. | 117H | Leamington | — |
| 2023-10-03 | 548-353 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Oil Springs | — |
| 2023-10-03 | 548-428 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Sombra | — |
| 2023-10-03 | 548-583 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Comber | — |
| 2023-10-03 | 548-701 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Pelee Island | — |
| 2023-10-03 | 548-832 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Pleasant Park | — |
| 2023-10-02 | 548-297 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Brigden | — |
| 2023-10-02 | 548-405 | not yet reported which blocks → | Videotron Ltd. | 328F | Listowel | — |
| 2023-09-29 | 548-294 | not yet reported which blocks → | Videotron Ltd. | 328F | Simcoe | — |
| 2023-09-29 | 548-295 | not yet reported which blocks → | Videotron Ltd. | 328F | Owen Sound | — |
| 2023-09-28 | 548-396 | not yet reported which blocks → | Videotron Ltd. | 328F | Chatham | — |
| 2023-09-21 | 548-395 | not yet reported which blocks → | Videotron Ltd. | 328F | Mount Forest | — |
| 2023-09-11 | 548-394 | not yet reported which blocks → | Videotron Ltd. | 328F | St. Thomas | — |
| 2023-09-07 | 548-385 | not yet reported which blocks → | Videotron Ltd. | 328F | Brantford | — |
| 2023-09-07 | 548-386 | not yet reported which blocks → | Videotron Ltd. | 328F | Sarnia | — |
| 2023-09-07 | 548-387 | not yet reported which blocks → | Videotron Ltd. | 328F | Woodstock | — |
| 2023-09-06 | 548-316 | not yet reported which blocks → | Videotron Ltd. | 328F | Guelph | — |
| 2023-09-05 | 548-454 | not yet reported which blocks → | Fibernetics Corporation | 464D | Sarnia | — |
| 2023-08-28 | 548-292 | not yet reported which blocks → | Fibernetics Corporation | 464D | Windsor | — |
| 2023-08-28 | 548-987 | not yet reported which blocks → | Fibernetics Corporation | 464D | Essex | — |
| 2023-08-25 | 548-974 | not yet reported which blocks → | Fibernetics Corporation | 464D | London | — |
| 2023-08-25 | 548-975 | not yet reported which blocks → | Fibernetics Corporation | 464D | Strathroy | — |
| 2023-08-01 | 548-578 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St. Jacobs | — |
| 2023-08-01 | 548-647 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Dorchester | — |
| 2023-08-01 | 548-813 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Glencoe | — |
| 2023-07-31 | 548-287 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Merlin | — |
| 2023-07-31 | 548-314 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ridgetown | — |
| 2023-07-31 | 548-462 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Thamesville | — |
| 2023-07-31 | 548-509 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Plattsville | — |
| 2023-07-27 | 548-453 | not yet reported which blocks → | Fibernetics Corporation | 464D | Woodstock | — |
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.