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 |
|---|---|---|---|---|---|---|
| 2012-03-02 | 917-808 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN07 | NY |
| 2012-03-02 | 917-942 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN12 | NY |
| 2012-03-02 | 917-943 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN08 | NY |
| 2012-01-23 | 917-795 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN04 | NY |
| 2011-12-13 | 917-870 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN03 | NY |
| 2009-03-26 | 917-500 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | NWYRCYZN11 | NY |
| 2009-03-26 | 917-600 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | NWYRCYZN11 | NY |
| 2007-10-26 | 917-652 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| 2007-07-23 | 917-474 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 917-202 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 917-504 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN03 | NY |
| — | 917-557 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN03 | NY |
| — | 917-569 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN03 | NY |
| — | 917-586 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 917-627 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 917-659 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN03 | NY |
| — | 917-676 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NWYRCYZN06 | NY |
| — | 917-889 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | NWYRCYZN03 | 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.