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 |
|---|---|---|---|---|---|---|
| 2026-06-11 | 641-408 | 9XXX which blocks → | METROPCS, INC. | 5562 | CORNING | IA |
| 2018-07-30 | 641-384 | 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | BELMOND | IA |
| 2018-06-20 | 641-354 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 8 holders which blocks → | METROPCS, INC. | 5562 | MARSHALLTN | IA |
| 2018-06-20 | 641-630 | 0–9 XXXall 10 · 7 holders which blocks → | METROPCS, INC. | 5562 | HAMPTON | IA |
| 2004-08-17 | 641-204 | 0–9 XXXall 10 · 7 holders which blocks → | METROPCS, INC. | 5562 | PELLA | IA |
| 2001-04-23 | 641-351 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → | METROPCS, INC. | 5562 | MARSHALLTN | IA |
| 2001-04-09 | 641-201 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | METROPCS, INC. | 5562 | MASON CITY | IA |
| — | 641-821 | 2XXX which blocks → | METROPCS, INC. | 5562 | GRINNELL | IA |
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.