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 |
|---|---|---|---|---|---|---|
| 2011-05-31 | 919-948 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | RALEIGH | NC |
| 2011-05-25 | 919-436 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | RALEIGH | NC |
| 2010-10-04 | 919-666 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | DURHAM | NC |
| 2005-03-10 | 919-504 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | GOLDSTON | NC |
| 2005-03-10 | 919-769 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | BONLEE | NC |
| 2005-01-21 | 919-701 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | BENSON | NC |
| 2004-08-06 | 919-757 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | RALEIGH | NC |
| 2001-05-18 | 919-533 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | PITTSBORO | NC |
| 2001-05-18 | 919-724 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | DURHAM | NC |
| — | 919-321 | 2XXX3XXX5XXX7XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | DURHAM | NC |
| — | 919-323 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | DURHAM | NC |
| — | 919-338 | 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | CHAPELHILL | NC |
| — | 919-341 | 6XXX7XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | RALEIGH | NC |
| — | 919-342 | 8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | CARY | NC |
| — | 919-386 | 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | CARY-RTP | NC |
| — | 919-439 | 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | CARY | NC |
| — | 919-483 | not yet reported which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | DURHAM | NC |
| — | 919-636 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | CHAPELHILL | NC |
| — | 919-647 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | RALEIGH | NC |
| — | 919-648 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | GOLDSBORO | NC |
| — | 919-746 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | RALEIGH | NC |
| — | 919-827 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | RALEIGH | NC |
| — | 919-926 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | RALEIGH | NC |
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.