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 |
|---|---|---|---|---|---|---|
| 2019-05-03 | 407-946 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | ORLANDO | FL |
| 2016-05-09 | 407-861 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KISSIMMEE | FL |
| 2014-09-30 | 407-775 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | WINTERPARK | FL |
| 2014-04-18 | 407-734 | 0–9 XXXall 10 · 8 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | ORLANDO | FL |
| 2012-11-21 | 407-609 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | WINTERPARK | FL |
| 2007-11-29 | 407-374 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | ORLANDO | FL |
| 2005-12-29 | 407-753 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | APOPKA | FL |
| 2005-12-29 | 407-910 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KISSIMMEE | FL |
| — | 407-347 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | WINTERGRDN | FL |
| — | 407-378 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | WINTERGRDN | FL |
| — | 407-392 | 0XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | GENEVA | FL |
| — | 407-470 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | ORLANDO | FL |
| — | 407-499 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | EASTORANGE | FL |
| — | 407-624 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KISSIMMEE | FL |
| — | 407-641 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | ORLANDO | FL |
| — | 407-710 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | SANFORD | FL |
| — | 407-727 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | ORLANDO | FL |
| — | 407-738 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | KISSIMMEE | FL |
| — | 407-792 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | SANFORD | FL |
| — | 407-901 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | OVIEDO | FL |
| — | 407-915 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | SANFORD | FL |
| — | 407-966 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | WKISSIMMEE | FL |
| — | 407-979 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | ST CLOUD | FL |
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.