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 |
|---|---|---|---|---|---|---|
| 2024-06-18 | 228-298 | 0XXX1XXX7XXX · 2 holders which blocks → | ONVOY, LLC - MS | 719E | MOSS POINT | MS |
| 2024-05-30 | 228-296 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - MS | 719E | BILOXI | MS |
| 2024-05-14 | 228-294 | 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - MS | 719E | OCEAN SPG | MS |
| 2024-02-28 | 228-292 | 0XXX1XXX which blocks → | ONVOY, LLC - MS | 719E | VANCLEAVE | MS |
| 2023-09-11 | 228-291 | 0XXX1XXX2XXX3XXX8XXX9XXX · 2 holders which blocks → | ONVOY, LLC - MS | 719E | TANNERWLMS | MS |
| 2023-08-10 | 228-289 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - MS | 719E | BILOXI | MS |
| 2023-08-10 | 228-290 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - MS | 719E | PASSCHRSTN | MS |
| 2021-04-23 | 228-910 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - MS | 719E | BILOXI | MS |
| 2018-05-08 | 228-300 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - MS | 719E | OCEAN SPG | MS |
| 2018-03-02 | 228-400 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - MS | 719E | BILOXI | MS |
| 2018-03-01 | 228-335 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - MS | 719E | TANNERWLMS | MS |
| 2017-04-21 | 228-900 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - MS | 719E | TANNERWLMS | MS |
| — | 228-280 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - MS | 719E | BILOXI | MS |
| — | 228-367 | 4XXX5XXX6XXX8XXX9XXX which blocks → | ONVOY, LLC - MS | 719E | GULFPORT | MS |
| — | 228-422 | 0XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - MS | 719E | PASCAGOULA | MS |
| — | 228-761 | 5XXX6XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - MS | 719E | PASCAGOULA | MS |
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.