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 |
|---|---|---|---|---|---|---|
| 2022-11-15 | 972-585 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - TX | 903C | GRANDPRARI | TX |
| 2022-05-04 | 972-640 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - TX | 903C | GRANDPRARI | TX |
| 2022-05-04 | 972-928 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - TX | 903C | FRISCO | TX |
| 2022-04-28 | 972-634 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - TX | 903C | ALLEN | TX |
| 2022-02-24 | 972-970 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - TX | 903C | GRANDPRARI | TX |
| 2017-10-19 | 972-972 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - TX | 903C | DALLAS | TX |
| 2007-07-02 | 972-600 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - TX | 903C | IRVING | TX |
| — | 972-268 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - TX | 903C | WAXAHACHIE | TX |
| — | 972-314 | 0XXX1XXX3XXX4XXX6XXX7XXX8XXX which blocks → | ONVOY, LLC - TX | 903C | GRANDPRARI | TX |
| — | 972-330 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - TX | 903C | ENNIS | TX |
| — | 972-331 | not yet reported which blocks → | ONVOY, LLC - TX | 903C | DALLAS | TX |
| — | 972-357 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - TX | 903C | FORNEY | TX |
| — | 972-440 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - TX | 903C | CARROLLTON | TX |
| — | 972-457 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - TX | 903C | IRVING | TX |
| — | 972-460 | 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | ONVOY, LLC - TX | 903C | CEDAR HILL | TX |
| — | 972-573 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - TX | 903C | IRVING | TX |
| — | 972-632 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - TX | 903C | MCKINNEY | TX |
| — | 972-755 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - TX | 903C | DALLAS | TX |
| — | 972-812 | not yet reported which blocks → | ONVOY, LLC - TX | 903C | IRVING | TX |
| — | 972-823 | 0XXX2XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → | ONVOY, LLC - TX | 903C | IRVING | TX |
| — | 972-848 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - TX | 903C | WILMER | TX |
| — | 972-895 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - TX | 903C | BRISTOL | TX |
| — | 972-920 | 3XXX5XXX6XXX9XXX · 3 holders which blocks → | ONVOY, LLC - TX | 903C | DE SOTO | TX |
| — | 972-954 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - TX | 903C | ALLEN | TX |
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.