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 |
|---|---|---|---|---|---|---|
| 2023-03-03 | 615-993 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | SPRINGFLD | TN |
| 2021-01-04 | 615-314 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | GOODLETSVL | TN |
| 2015-03-05 | 615-606 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | GOODLETSVL | TN |
| 2012-10-08 | 615-801 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | MURFREESBO | TN |
| 2012-05-24 | 615-605 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | MURFREESBO | TN |
| 2011-04-13 | 615-689 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | NASHVILLE | TN |
| 2011-02-10 | 615-900 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | MURFREESBO | TN |
| — | 615-260 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NASHVILLE | TN |
| — | 615-293 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NASHVILLE | TN |
| — | 615-294 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NASHVILLE | TN |
| — | 615-389 | 0XXX2XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | SPRINGFLD | TN |
| — | 615-438 | none assigned yet which blocks → | METROPCS, INC. | 5562 | NASHVILLE | TN |
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.