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 |
|---|---|---|---|---|---|---|
| 2021-09-23 | 413-807 | 0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 5 holders which blocks → | METROPCS, INC. | 5562 | PALMER | MA |
| 2016-09-21 | 413-507 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | SPRINGFLD | MA |
| 2008-09-11 | 413-777 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | SPRINGFLD | MA |
| 2004-08-16 | 413-347 | 0–9 XXXall 10 · 7 holders which blocks → | METROPCS, INC. | 5562 | PITTSFIELD | MA |
| 2001-01-10 | 413-657 | 0XXX2XXX5XXX7XXX8XXX which blocks → | METROPCS, INC. | 5562 | SPRINGFLD | MA |
| — | 413-218 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SPRINGFLD | MA |
| — | 413-219 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SPRINGFLD | MA |
| — | 413-221 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SPRINGFLD | MA |
| — | 413-222 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SPRINGFLD | MA |
| — | 413-326 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | NORTHAMPTN | MA |
| — | 413-614 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | NORTHAMPTN | MA |
| — | 413-640 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | PALMER | MA |
| — | 413-841 | 3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | PITTSFIELD | MA |
| — | 413-883 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SPRINGFLD | MA |
| — | 413-977 | 0XXX2XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | WESTFIELD | 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.