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 |
|---|---|---|---|---|---|---|
| 2020-05-15 | 651-377 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | TWINCITIES | MN |
| 2018-08-20 | 651-359 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | RED WING | MN |
| 2012-07-16 | 651-318 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | HASTINGS | MN |
| 2006-02-08 | 651-797 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | TWINCITIES | MN |
| 2004-12-28 | 651-400 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | LINDSTROM | MN |
| 2004-12-01 | 651-538 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | SCANDIMRIN | MN |
| 2004-07-27 | 651-212 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | RED WING | MN |
| 2002-10-22 | 651-472 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | STILLWATER | MN |
| 2001-05-23 | 651-309 | 3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | RED WING | MN |
| — | 651-204 | 8XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | TWINCITIES | MN |
| — | 651-304 | 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | HASTINGS | MN |
| — | 651-344 | 1XXX7XXX8XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | TWINCITIES | MN |
| — | 651-393 | 5XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | TWINCITIES | MN |
| — | 651-556 | 2XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | TWINCITIES | MN |
| — | 651-796 | 8XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | TWINCITIES | MN |
| — | 651-815 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | TWINCITIES | MN |
| — | 651-842 | 2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | TWINCITIES | MN |
| — | 651-964 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | TWINCITIES | MN |
| — | 651-967 | 2XXX5XXX6XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | STILLWATER | MN |
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.