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 |
|---|---|---|---|---|---|---|
| — | 440-678 | 0XXX1XXX2XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | CHESTERLD | OH |
| — | 440-682 | 0XXX1XXX2XXX3XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | BURTON | OH |
| — | 440-709 | 2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | PAINESVL | OH |
| — | 440-710 | 1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | WILLOUGHBY | OH |
| — | 440-721 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | PAINESVL | OH |
| — | 440-793 | 1XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | OLMSTEDFLS | OH |
| — | 440-847 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | TRINITY | OH |
| — | 440-854 | 1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | WICKLIFFE | OH |
| — | 440-856 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | WILLOUGHBY | OH |
| — | 440-869 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | HILLCREST | OH |
| — | 440-882 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | VICTORY | OH |
| — | 440-940 | 1XXX2XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | GATESMILLS | OH |
| — | 440-945 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | BEDFORD | OH |
| — | 440-971 | 6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | BEREA | OH |
| — | 440-972 | 1XXX6XXX7XXX8XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | BRECKSVL | OH |
| — | 440-973 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | BEREA | OH |
| — | 440-991 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | CHAGRINFLS | OH |
| — | 440-996 | 6XXX7XXX8XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | CHAGRINFLS | OH |
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.