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 |
|---|---|---|---|---|---|---|
| 2019-11-25 | 479-376 | 0XXX1XXX2XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | FORUM | AR |
| 2019-11-25 | 479-377 | 0XXX1XXX2XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | AURORA | AR |
| 2018-02-13 | 479-327 | 0XXX1XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | STRICKLER | AR |
| 2018-02-13 | 479-328 | 0XXX1XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | MORROW | AR |
| 2017-05-25 | 479-241 | 0XXX2XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | ST PAUL | AR |
| 2017-05-24 | 479-210 | 0XXX1XXX2XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | DRAKES CRK | AR |
| 2015-08-31 | 479-319 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | BENTONVL | AR |
| 2005-10-13 | 479-282 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | ROGERS | AR |
| 2005-10-13 | 479-316 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | FAYETTEVL | AR |
| 2005-10-13 | 479-802 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | BENTONVL | AR |
| 2004-04-29 | 479-239 | 1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | EUREKA SPG | AR |
| 2002-12-23 | 479-202 | 1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | ROGERS | AR |
| 2002-07-24 | 479-250 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | BENTONVL | AR |
| 2002-05-30 | 479-689 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | VAN BUREN | AR |
| 2002-05-13 | 479-431 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | FORT SMITH | AR |
| 2002-05-13 | 479-439 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | FAYETTEVL | AR |
| 2001-09-21 | 479-935 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | FAYETTEVL | AR |
| 2001-05-08 | 479-385 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | MENA | AR |
| — | 479-234 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | MENA | AR |
| — | 479-595 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | FAYETTEVL | AR |
| — | 479-668 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | FORT SMITH | AR |
| — | 479-715 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | BENTONVL | AR |
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.