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 |
|---|---|---|---|---|---|---|
| — | 347-351 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-385 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-386 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN07 | NY |
| — | 347-423 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-432 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-451 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-455 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN10 | NY |
| — | 347-489 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-512 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-524 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN07 | NY |
| — | 347-526 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-528 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-531 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN08 | NY |
| — | 347-549 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN07 | NY |
| — | 347-564 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-581 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-595 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | NWYRCYZN03 | NY |
| — | 347-623 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-644 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN10 | NY |
| — | 347-645 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-661 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-678 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-683 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-693 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-731 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-736 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN03 | NY |
| — | 347-742 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 347-773 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN05 | NY |
| — | 347-829 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN10 | NY |
| — | 347-869 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN12 | NY |
| — | 347-878 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN10 | NY |
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.