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 |
|---|---|---|---|---|---|---|
| 2018-10-01 | 586-525 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | ARMADA | MI |
| 2016-09-22 | 586-696 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2016-01-04 | 586-241 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2015-08-05 | 586-252 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2010-10-21 | 586-277 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | NEW HAVEN | MI |
| 2009-12-16 | 586-404 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2009-03-05 | 586-209 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2006-10-10 | 586-329 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | MT CLEMENS | MI |
| — | 586-339 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | NEW HAVEN | MI |
| — | 586-350 | 0XXX2XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| — | 586-360 | 0XXX1XXX2XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| — | 586-362 | 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 6 holders which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| — | 586-420 | 0XXX1XXX2XXX7XXX8XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| — | 586-491 | 1XXX2XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| — | 586-675 | 0XXX1XXX2XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| — | 586-801 | 1XXX2XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| — | 586-823 | 2XXX which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| — | 586-871 | 2XXX which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| — | 586-872 | 2XXX which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| — | 586-935 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | METROPCS, INC. | 5562 | WASHINGTON | MI |
| — | 586-943 | 2XXX which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| — | 586-944 | 0XXX2XXX which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| — | 586-945 | 2XXX which blocks → | METROPCS, INC. | 5562 | ROSEVILLE | MI |
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.