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 |
|---|---|---|---|---|---|---|
| 2008-07-23 | 508-840 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | ATTLEBORO | MA |
| 2008-07-23 | 508-933 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | ROCHESTER | MA |
| 2001-02-14 | 508-963 | none assigned yet which blocks → | METROPCS, INC. | 5562 | WORCESTER | MA |
| 2001-02-14 | 508-989 | none assigned yet which blocks → | METROPCS, INC. | 5562 | FALL RIVER | MA |
| — | 508-232 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | BROCKTON | MA |
| — | 508-294 | none assigned yet which blocks → | METROPCS, INC. | 5562 | HOPKINTON | MA |
| — | 508-326 | none assigned yet which blocks → | METROPCS, INC. | 5562 | BROCKTON | MA |
| — | 508-328 | none assigned yet which blocks → | METROPCS, INC. | 5562 | HOPKINTON | MA |
| — | 508-400 | none assigned yet which blocks → | METROPCS, INC. | 5562 | HOPKINTON | MA |
| — | 508-441 | 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | NEWBEDFORD | MA |
| — | 508-579 | none assigned yet which blocks → | METROPCS, INC. | 5562 | WORCESTER | MA |
| — | 508-726 | none assigned yet which blocks → | METROPCS, INC. | 5562 | MARLBORO | MA |
| — | 508-740 | none assigned yet which blocks → | METROPCS, INC. | 5562 | FRAMINGHAM | MA |
| — | 508-889 | none assigned yet which blocks → | METROPCS, INC. | 5562 | ROCHESTER | MA |
| — | 508-922 | none assigned yet which blocks → | METROPCS, INC. | 5562 | HOPKINTON | MA |
| — | 508-958 | none assigned yet which blocks → | METROPCS, INC. | 5562 | HOPKINTON | MA |
| — | 508-982 | none assigned yet which blocks → | METROPCS, INC. | 5562 | LAWRENCE | MA |
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.