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 |
|---|---|---|---|---|---|---|
| 2024-03-18 | 417-431 | 7XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | METZ | MO |
| 2024-03-18 | 417-474 | 4XXX7XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | RICHARDS | MO |
| 2022-11-22 | 417-563 | 7XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | RICH HILL | MO |
| 2010-05-24 | 417-708 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | SPRINGFLD | MO |
| 2006-09-05 | 417-727 | 0XXX2XXX7XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | POLK | MO |
| 2004-01-21 | 417-651 | 0XXX1XXX2XXX3XXX4XXX7XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | GAINESVL | MO |
| 2004-01-21 | 417-896 | 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CASSVILLE | MO |
| 2003-01-29 | 417-297 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BRANSON | MO |
| 2002-12-31 | 417-295 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LAMAR | MO |
| 2002-08-16 | 417-200 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | GALENA | MO |
| 2002-08-16 | 417-201 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BRADLEYVL | MO |
| 2002-08-16 | 417-202 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BLUE EYE | MO |
| 2002-08-16 | 417-203 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CRANE | MO |
| 2002-08-09 | 417-344 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LEBANON | MO |
| 2002-07-16 | 417-231 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BRANSON | MO |
| 2002-05-16 | 417-222 | 1XXX2XXX3XXX4XXX7XXX8XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | GALENA | MO |
| 2002-05-06 | 417-459 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | SPRINGFLD | MO |
| 2002-05-06 | 417-595 | 0XXX7XXX8XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | NIXA | MO |
| 2002-05-06 | 417-622 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | JOPLIN | MO |
| 2002-05-06 | 417-660 | 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LAMAR | MO |
| 2002-04-29 | 417-244 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | EFORTSCOTT | MO |
| 2001-10-08 | 417-553 | 1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | JOPLIN | MO |
| 2001-05-14 | 417-671 | 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CASSVILLE | MO |
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.