NumberResearchRecent prefix assignments
1 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 |
|---|---|---|---|---|---|---|
| 2026-09-17 | 401-549 | 0XXX which blocks → | ONVOY, LLC - RI | 977E | PROVIDENCE | RI |
| 2025-01-09 | 401-476 | 0XXX1XXX2XXX9XXX · 2 holders which blocks → | ONVOY, LLC - RI | 977E | CENTREDALE | RI |
| 2024-02-21 | 401-469 | 0XXX1XXX · 2 holders which blocks → | ONVOY, LLC - RI | 977E | PASCOAG | RI |
| 2023-12-15 | 401-446 | 0XXX1XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - RI | 977E | NARRAGNSTT | RI |
| 2023-12-15 | 401-448 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - RI | 977E | PAWTUCKET | RI |
| 2021-07-20 | 401-373 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - RI | 977E | CENTREDALE | RI |
| 2021-04-08 | 401-910 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - RI | 977E | PROVIDENCE | RI |
| 2017-09-27 | 401-800 | 0XXX1XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - RI | 977E | BLOCK IS | RI |
| 2016-02-24 | 401-618 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - RI | 977E | CENTREDALE | RI |
| 2011-01-12 | 401-200 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | ONVOY, LLC - RI | 977E | BRISTOL | RI |
| 2008-03-19 | 401-347 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - RI | 977E | PROVIDENCE | RI |
| 2001-07-10 | 401-610 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - RI | 977E | COVENTRY | RI |
| — | 401-210 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | BLOCK IS | RI |
| — | 401-238 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | CAROLINA | RI |
| — | 401-271 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | CENTREDALE | RI |
| — | 401-313 | 0XXX1XXX3XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → | ONVOY, LLC - RI | 977E | COVENTRY | RI |
| — | 401-386 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | NO KINGSTN | RI |
| — | 401-399 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | ONVOY, LLC - RI | 977E | NEWPORT | RI |
| — | 401-417 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - RI | 977E | NEWPORT | RI |
| — | 401-496 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | PORTSMOUTH | RI |
| — | 401-561 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | WARREN | RI |
| — | 401-593 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | WARWICK | RI |
| — | 401-620 | 0XXX2XXX3XXX which blocks → | ONVOY, LLC - RI | 977E | WESTERLY | RI |
| — | 401-638 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | BRISTOL | RI |
| — | 401-715 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | GREENWICH | RI |
| — | 401-735 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | ONVOY, LLC - RI | 977E | PROVIDENCE | RI |
| — | 401-740 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | HOPEVALLEY | RI |
| — | 401-756 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | JAMESTOWN | RI |
| — | 401-804 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | PASCOAG | RI |
| — | 401-812 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | SCITUATE | RI |
| — | 401-858 | 0XXX3XXX4XXX5XXX9XXX · 2 holders which blocks → | ONVOY, LLC - RI | 977E | TIVERTON | RI |
| — | 401-896 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | WGLOCESTER | RI |
| — | 401-922 | not yet reported which blocks → | ONVOY, LLC - RI | 977E | W WARWICK | RI |
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.