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 |
|---|---|---|---|---|---|---|
| 2024-05-22 | 641-287 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | PEORIA | IA |
| 2024-05-22 | 641-291 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | PLANO | IA |
| 2024-05-22 | 641-294 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | RUSSELL | IA |
| 2024-05-22 | 641-299 | 0XXX9XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | SHANNON CY | IA |
| 2024-05-22 | 641-368 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | OTLEY | IA |
| 2024-05-20 | 641-280 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | LUCAS | IA |
| 2024-05-20 | 641-296 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | NEWVIRGINI | IA |
| 2024-05-20 | 641-301 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | MARTENSDL | IA |
| 2024-05-20 | 641-402 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | MARTINSBG | IA |
| 2024-05-20 | 641-690 | 0XXX6XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | MACKSBURG | IA |
| 2024-05-20 | 641-760 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | MINGO | IA |
| 2024-05-06 | 641-279 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | DOUDS | IA |
| 2024-05-06 | 641-283 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | ELDON | IA |
| 2024-05-06 | 641-284 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | FARSON | IA |
| 2024-05-06 | 641-285 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | HEDRICK | IA |
| 2024-05-06 | 641-286 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | KELLERTON | IA |
| 2024-05-06 | 641-292 | 0XXX2XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | LIBERTYCTR | IA |
| 2024-05-01 | 641-265 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | ATTICA | IA |
| 2024-05-01 | 641-267 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | CHILLICOTH | IA |
| 2024-05-01 | 641-270 | 0XXX1XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | CINCINNATI | IA |
| 2024-05-01 | 641-271 | 0XXX1XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | CLEARFIELD | IA |
| 2024-05-01 | 641-273 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | DIAGONAL | IA |
| 2024-03-28 | 641-518 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | DELTA | IA |
| 2024-03-28 | 641-589 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | SEYMOUR | IA |
| 2024-03-28 | 641-601 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | TRACY | IA |
| 2024-03-28 | 641-639 | 0XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | MYSTIC | IA |
| 2024-02-09 | 641-714 | 4XXX which blocks → | ONVOY SPECTRUM, LLC | 624H | LE GRAND | IA |
| 2021-04-13 | 641-643 | 0XXX2XXX3XXX4XXX6XXX9XXX · 3 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | MALCOM | IA |
| 2019-11-05 | 641-276 | 1XXX2XXX6XXX7XXX9XXX · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | AGENCY | IA |
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.