NumberResearchRecent prefix assignments
5 prefixes assigned in July 2026 · 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 |
|---|---|---|---|---|---|---|
| 2026-07-28 | 458-403 | 2XXX which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | ALBANY | OR |
| 2026-07-24 | 458-363 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - OR | 750E | EUGENE | OR |
| 2026-07-22 | 458-341 | 0XXX which blocks → | ONVOY, LLC - OR | 750E | CENTRAL PT | OR |
| 2026-07-22 | 458-342 | 0XXX which blocks → | ONVOY, LLC - OR | 750E | CORVALLIS | OR |
| 2026-07-08 | 458-340 | 0XXX which blocks → | ONVOY, LLC - OR | 750E | NEWPORT | OR |
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.