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 |
|---|---|---|---|---|---|---|
| 2025-03-13 | 417-534 | 0XXX9XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | WILLOW SPG | MO |
| 2025-03-13 | 417-539 | 0XXX7XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | HOUSTON | MO |
| 2016-11-04 | 417-370 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | SPRINGFLD | MO |
| 2002-03-25 | 417-393 | 0XXX1XXX3XXX5XXX6XXX7XXX · 5 holders which blocks → | METROPCS, INC. | 5562 | MONETT | MO |
| 2001-05-10 | 417-658 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | NEOSHO | MO |
| — | 417-204 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | WESTPLAINS | MO |
| — | 417-381 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 7 holders which blocks → | METROPCS, INC. | 5562 | NEVADA | MO |
| — | 417-768 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → | METROPCS, INC. | 5562 | JOPLIN | MO |
| — | 417-971 | 1XXX7XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | PINEVILLE | 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.