NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026
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 |
|---|---|---|---|---|---|---|
| 2002-06-06 | 573-451 | 1XXX2XXX3XXX4XXX · 2 holders which blocks → | FIDELITY CABLEVISION, LLC | 3275 | ST ROBERT | MO |
| 2002-06-06 | 573-452 | 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → | FIDELITY CABLEVISION, LLC | 3275 | FTLENARDWD | MO |
| 2002-06-06 | 573-453 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | FIDELITY CABLEVISION, LLC | 3275 | SALEM | MO |
| 2002-06-06 | 573-456 | 2XXX which blocks → | FIDELITY CABLEVISION, LLC | 3275 | NEWBURG | MO |
| 2002-06-06 | 573-460 | 0XXX2XXX6XXX · 3 holders which blocks → | FIDELITY CABLEVISION, LLC | 3275 | RICHLAND | MO |
| 2001-10-23 | 573-677 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | FIDELITY CABLEVISION, LLC | 3356 | CUBA | MO |
| 2001-10-23 | 573-679 | 0XXX3XXX4XXX7XXX · 3 holders which blocks → | FIDELITY CABLEVISION, LLC | 3356 | BOURBON | MO |
| 2001-10-23 | 573-899 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | FIDELITY CABLEVISION, LLC | 3356 | ST JAMES | MO |
| — | 573-426 | 0XXX4XXX7XXX · 2 holders which blocks → | FIDELITY CABLEVISION, LLC | 3275 | ROLLA | MO |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.