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 |
|---|---|---|---|---|---|---|
| 2017-11-20 | 315-909 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | NEWARK | NY |
| 2003-05-12 | 315-856 | 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → | METROPCS, INC. | 5562 | WATERLOO | NY |
| 2002-09-23 | 315-277 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | METROPCS, INC. | 5562 | JORDAN | NY |
| 2001-08-14 | 315-567 | 0XXX2XXX4XXX5XXX7XXX8XXX · 5 holders which blocks → | METROPCS, INC. | 5562 | AUBURN | NY |
| 2001-04-18 | 315-254 | 2XXX which blocks → | METROPCS, INC. | 5562 | SYRACUSE | NY |
| 2001-04-18 | 315-372 | 0XXX2XXX5XXX7XXX8XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | SYRACUSE | NY |
| 2001-04-18 | 315-373 | 0XXX2XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | SYRACUSE | NY |
| 2001-04-18 | 315-383 | 0XXX which blocks → | METROPCS, INC. | 5562 | SYRACUSE | NY |
| 2001-04-18 | 315-491 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SYRACUSE | NY |
| — | 315-884 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | SYRACUSE | NY |
| — | 315-885 | 0XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | SYRACUSE | NY |
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.