NumberResearchRecent prefix assignments
0 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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2024-08-26 | 753-728 | not yet reported which blocks → | Fibernetics Corporation | 464D | Mallorytown | — |
| 2024-08-26 | 753-729 | not yet reported which blocks → | Fibernetics Corporation | 464D | Cardinal | — |
| 2024-08-26 | 753-730 | not yet reported which blocks → | Fibernetics Corporation | 464D | Spencerville | — |
| 2023-01-09 | 753-760 | not yet reported which blocks → | Fibernetics Corporation | 464D | Cornwall | — |
| 2023-01-09 | 753-761 | not yet reported which blocks → | Fibernetics Corporation | 464D | Vankleek Hill | — |
| 2022-12-15 | 753-754 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bath | — |
| 2022-12-15 | 753-755 | not yet reported which blocks → | Fibernetics Corporation | 464D | Gananoque | — |
| 2022-12-15 | 753-756 | not yet reported which blocks → | Fibernetics Corporation | 464D | Kingston | — |
| 2022-12-15 | 753-757 | not yet reported which blocks → | Fibernetics Corporation | 464D | Napanee | — |
| 2022-12-15 | 753-758 | not yet reported which blocks → | Fibernetics Corporation | 464D | Deseronto | — |
| 2022-12-15 | 753-759 | not yet reported which blocks → | Fibernetics Corporation | 464D | Inverary | — |
| 2022-08-08 | 753-721 | not yet reported which blocks → | Fibernetics Corporation | 464D | Elgin | — |
| 2022-08-08 | 753-722 | not yet reported which blocks → | Fibernetics Corporation | 464D | Lanark | — |
| 2022-08-08 | 753-723 | not yet reported which blocks → | Fibernetics Corporation | 464D | Maberly | — |
| 2022-08-08 | 753-724 | not yet reported which blocks → | Fibernetics Corporation | 464D | McDonalds Corners | — |
| 2022-08-08 | 753-725 | not yet reported which blocks → | Fibernetics Corporation | 464D | Perth | — |
| 2022-08-08 | 753-726 | not yet reported which blocks → | Fibernetics Corporation | 464D | Portland | — |
| 2022-08-08 | 753-727 | not yet reported which blocks → | Fibernetics Corporation | 464D | Toledo | — |
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.