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 |
|---|---|---|---|---|---|---|
| 2022-01-31 | 548-412 | not yet reported which blocks → | Fibernetics Corporation | 464D | Alvinston | — |
| 2022-01-31 | 548-413 | not yet reported which blocks → | Fibernetics Corporation | 464D | Brigden | — |
| 2022-01-31 | 548-414 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bright's Grove | — |
| 2022-01-31 | 548-415 | not yet reported which blocks → | Fibernetics Corporation | 464D | Corunna | — |
| 2022-01-31 | 548-416 | not yet reported which blocks → | Fibernetics Corporation | 464D | Courtright | — |
| 2022-01-31 | 548-417 | not yet reported which blocks → | Fibernetics Corporation | 464D | Oil Springs | — |
| 2022-01-31 | 548-418 | not yet reported which blocks → | Fibernetics Corporation | 464D | Petrolia | — |
| 2022-01-31 | 548-419 | not yet reported which blocks → | Fibernetics Corporation | 464D | Port Lambton | — |
| 2022-01-31 | 548-420 | not yet reported which blocks → | Fibernetics Corporation | 464D | Sombra | — |
| 2022-01-31 | 548-421 | not yet reported which blocks → | Fibernetics Corporation | 464D | Watford | — |
| 2022-01-31 | 548-422 | not yet reported which blocks → | Fibernetics Corporation | 464D | Wyoming | — |
| 2022-01-27 | 548-798 | not yet reported which blocks → | Iristel Inc. | 154E | Chatham | — |
| 2022-01-20 | 548-906 | not yet reported which blocks → | Iristel Inc. | 154E | Essex | — |
| 2022-01-19 | 548-918 | not yet reported which blocks → | Iristel Inc. | 154E | Leamington | — |
| 2022-01-18 | 548-392 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Alvinston | — |
| 2022-01-18 | 548-393 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Courtright | — |
| 2022-01-18 | 548-705 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Port Lambton | — |
| 2022-01-18 | 548-706 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Watford | — |
| 2022-01-12 | 548-375 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ridgetown | — |
| 2022-01-12 | 548-376 | not yet reported which blocks → | Fibernetics Corporation | 464D | Thamesville | — |
| 2022-01-12 | 548-377 | not yet reported which blocks → | Fibernetics Corporation | 464D | Tilbury | — |
| 2022-01-12 | 548-378 | not yet reported which blocks → | Fibernetics Corporation | 464D | Wallaceburg | — |
| 2022-01-11 | 548-370 | not yet reported which blocks → | Fibernetics Corporation | 464D | Blenheim | — |
| 2022-01-11 | 548-371 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bothwell | — |
| 2022-01-11 | 548-372 | not yet reported which blocks → | Fibernetics Corporation | 464D | Dresden | — |
| 2022-01-11 | 548-373 | not yet reported which blocks → | Fibernetics Corporation | 464D | Highgate | — |
| 2022-01-11 | 548-374 | not yet reported which blocks → | Fibernetics Corporation | 464D | Merlin | — |
| 2021-12-21 | 548-897 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Sarnia | — |
| 2021-12-16 | 548-557 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Guelph | — |
| 2021-11-12 | 548-440 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Kitchener-Waterloo | — |
| 2021-11-12 | 548-470 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Hespeler | — |
| 2021-11-12 | 548-520 | not yet reported which blocks → | IXICA Communications Inc. | 812H | New Hamburg | — |
| 2021-11-12 | 548-530 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Preston | — |
| 2021-11-12 | 548-590 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Wellesley | — |
| 2021-11-10 | 548-477 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Galt | — |
| 2021-11-10 | 548-510 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Ayr | — |
| 2021-11-10 | 548-580 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Elmira | — |
| 2021-11-10 | 548-708 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2021-11-10 | 548-709 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2021-11-09 | 548-312 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | New Hamburg | — |
| 2021-11-09 | 548-332 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Windsor | — |
| 2021-11-05 | 548-313 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Wellesley | — |
| 2021-09-27 | 548-540 | not yet reported which blocks → | Fibernetics Corporation | 464D | Atwood | — |
| 2021-09-27 | 548-541 | not yet reported which blocks → | Fibernetics Corporation | 464D | Dublin | — |
| 2021-09-27 | 548-542 | not yet reported which blocks → | Fibernetics Corporation | 464D | Harriston | — |
| 2021-09-27 | 548-543 | not yet reported which blocks → | Fibernetics Corporation | 464D | Mitchell | — |
| 2021-09-27 | 548-544 | not yet reported which blocks → | Fibernetics Corporation | 464D | Monkton | — |
| 2021-09-27 | 548-545 | not yet reported which blocks → | Fibernetics Corporation | 464D | Palmerston | — |
| 2021-09-27 | 548-546 | not yet reported which blocks → | Fibernetics Corporation | 464D | Shakespeare | — |
| 2021-09-27 | 548-547 | not yet reported which blocks → | Fibernetics Corporation | 464D | St. Marys | — |
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.