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 |
|---|---|---|---|---|---|---|
| — | 724-599 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | INDIANA | PA |
| — | 724-615 | 0XXX3XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | GROVE CITY | PA |
| — | 724-647 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | BEAVER FLS | PA |
| — | 724-648 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | CALIFORNIA | PA |
| — | 724-675 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | BLAIRSVL | PA |
| — | 724-705 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | WASHINGTON | PA |
| — | 724-769 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | CALIFORNIA | PA |
| — | 724-798 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | BELLEVRNON | PA |
| — | 724-812 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | UNIONTOWN | PA |
| — | 724-825 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | WASHINGTON | PA |
| — | 724-858 | 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | GREENSBURG | PA |
| — | 724-871 | 0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | PTGSBNZN23 | PA |
| — | 724-906 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | WMIDDLESEX | PA |
| — | 724-907 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | SCOTTDALE | PA |
| — | 724-918 | 0XXX1XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | FINLEYVL | PA |
| — | 724-960 | 0XXX3XXX4XXX8XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | MCMURRAY | PA |
| — | 724-965 | 0XXX3XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | NEW CASTLE | PA |
| — | 724-972 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | GREENSBURG | PA |
| — | 724-987 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | ROCHESTER | PA |
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.