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 |
|---|---|---|---|---|---|---|
| 2011-10-03 | 314-296 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | ST LOUIS | MO |
| 2002-03-26 | 314-262 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LADUE | MO |
| — | 314-227 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LADUE | MO |
| — | 314-266 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LADUE | MO |
| — | 314-485 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CREVECOEUR | MO |
| — | 314-488 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | KIRKWOOD | MO |
| — | 314-549 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | OAKVILLE | MO |
| — | 314-558 | 3XXX7XXX8XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | ST LOUIS | MO |
| — | 314-563 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LADUE | MO |
| — | 314-593 | 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LADUE | MO |
| — | 314-594 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CREVECOEUR | MO |
| — | 314-596 | 1XXX2XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | KIRKWOOD | MO |
| — | 314-598 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LADUE | MO |
| — | 314-635 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | SAPPINGTON | MO |
| — | 314-642 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LADUE | MO |
| — | 314-667 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | ST LOUIS | MO |
| — | 314-675 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | MEHLVILLE | MO |
| — | 314-690 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | SAPPINGTON | MO |
| — | 314-720 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CREVECOEUR | MO |
| — | 314-732 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | ST LOUIS | MO |
| — | 314-766 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | ST LOUIS | MO |
| — | 314-778 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LADUE | MO |
| — | 314-888 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | LADUE | MO |
| — | 314-899 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | ST LOUIS | 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.