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 |
|---|---|---|---|---|---|---|
| 2001-05-10 | 660-956 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | KIRKSVILLE | MO |
| — | 660-262 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | WARRENSBG | MO |
| — | 660-289 | 0XXX1XXX5XXX7XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | PARIS | MO |
| — | 660-301 | 2XXX7XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | HOPKINS | MO |
| — | 660-472 | 4XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BLACKWATER | MO |
| — | 660-560 | 0XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | HIGH POINT | MO |
| — | 660-669 | 0XXX7XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | OREGON | MO |
| — | 660-671 | 1XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | PICKERING | MO |
| — | 660-691 | 0XXX4XXX7XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CLARENCE | MO |
| — | 660-774 | 4XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | SPEED | MO |
| — | 660-972 | none assigned yet which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | NELSON | MO |
| — | 660-977 | 7XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | BUNCETON | MO |
| — | 660-978 | none assigned yet which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | PILOTGROVE | 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.