NumberResearchRecent prefix assignments
6 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 |
|---|---|---|---|---|---|---|
| — | 346-555 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | DIR ASST | TX |
| — | 346-611 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TX |
| — | 346-643 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - TX | 903C | SPLENDORA | TX |
| — | 346-664 | 0–9 XXXall 10 · 2 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | BAMMEL | TX |
| — | 346-700 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | TX | |
| — | 346-701 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - TX | 903C | HOUSTON | TX |
| — | 346-706 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - TX | 903C | PINEHURST | TX |
| — | 346-711 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TX |
| — | 346-746 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | THE VOICE APPLICATION NETWORK, LLC | 507J | SMITHERSLK | TX |
| — | 346-811 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TX |
| — | 346-911 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | TX |
| — | 346-950 | not yet reported which blocks → | TX | |||
| — | 346-958 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | TX | |
| — | 346-959 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | TX | |
| — | 346-976 | not yet reported which blocks → | TX | |||
| — | 346-980 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | HOUSTON | 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.