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 |
|---|---|---|---|---|---|---|
| 2024-04-01 | 703-381 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | LEESBURG | VA |
| 2024-03-11 | 703-540 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN08 | VA |
| 2023-11-20 | 703-410 | 0–9 XXXwhole prefix which blocks → | ONVOY SPECTRUM, LLC | 624H | MANASSAS | VA |
| 2023-07-05 | 703-301 | 0–9 XXXwhole prefix which blocks → | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN08 | VA |
| 2023-05-17 | 703-703 | 0–9 XXXwhole prefix which blocks → | ONVOY SPECTRUM, LLC | 624H | WSNGTNZN17 | VA |
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.