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 |
|---|---|---|---|---|---|---|
| 2002-05-10 | 601-778 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | LAUREL | MS |
| 2002-05-10 | 601-897 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | NATCHEZ | MS |
| 2001-05-30 | 601-488 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | CLINTON | MS |
| 2001-02-28 | 601-448 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | PORTGIBSON | MS |
| 2001-02-28 | 601-464 | not yet reported which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | PURVIS | MS |
| 2001-01-31 | 601-453 | 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | MERIDIAN | MS |
| — | 601-234 | not yet reported which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | RALEIGH | MS |
| — | 601-255 | 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | HATTIESBG | MS |
| — | 601-363 | 0XXX3XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | LUCEDALE | MS |
| — | 601-367 | 0XXX1XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | WIGGINS | MS |
| — | 601-379 | none assigned yet which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | PICAYUNE | MS |
| — | 601-386 | none assigned yet which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | POPLARVL | MS |
| — | 601-427 | 4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | MADISON | MS |
| — | 601-510 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | JACKSON | MS |
| — | 601-568 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | PHILA | MS |
| — | 601-871 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | RAYMOND | MS |
| — | 601-914 | 8XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | JACKSON | MS |
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.