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 |
|---|---|---|---|---|---|---|
| 2026-06-08 | 548-301 | not yet reported which blocks → | Bell Mobility | 6574 | London | — |
| 2025-01-09 | 548-334 | not yet reported which blocks → | Bell Mobility | 6574 | Leamington | — |
| 2025-01-09 | 548-595 | not yet reported which blocks → | Bell Mobility | 6574 | Brantford | — |
| 2024-01-11 | 548-350 | not yet reported which blocks → | Bell Mobility | 6574 | Kitchener-Waterloo | — |
| 2023-01-23 | 548-323 | not yet reported which blocks → | Bell Mobility | 6574 | Port Elgin | — |
| 2022-10-04 | 548-398 | not yet reported which blocks → | Bell Mobility | 6574 | Kitchener-Waterloo | — |
| 2021-02-25 | 548-328 | not yet reported which blocks → | Bell Mobility | 6574 | Brantford | — |
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.