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 |
|---|---|---|---|---|---|---|
| 2025-01-07 | 567-476 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | ANTWERP | OH |
| 2025-01-07 | 567-477 | 0XXX7XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | NEW RIEGEL | OH |
| 2024-02-14 | 567-567 | 2XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | OAKWOOD | OH |
| 2024-01-08 | 567-438 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | MANSFIELD | OH |
| 2021-04-15 | 567-901 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | TOLEDO | OH |
| 2020-02-24 | 567-667 | 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | EDON | OH |
| 2019-10-10 | 567-710 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | LIMA | OH |
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.