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 |
|---|---|---|---|---|---|---|
| 2017-06-21 | 321-272 | 0–9 XXXall 10 · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | MELBOURNE | FL |
| 2016-10-03 | 321-603 | 0–9 XXXall 10 · 7 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | TITUSVILLE | FL |
| 2016-04-26 | 321-361 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | MELBOURNE | FL |
| 2001-12-18 | 321-327 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | MELBOURNE | FL |
| — | 321-392 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | COCOABEACH | FL |
| — | 321-426 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | EAU GALLIE | FL |
| — | 321-604 | 0–9 XXXall 10 · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | COCOA | FL |
| — | 321-607 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | TITUSVILLE | FL |
| — | 321-608 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | MELBOURNE | FL |
| — | 321-610 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | EAU GALLIE | FL |
| — | 321-613 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | COCOABEACH | FL |
| — | 321-615 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | COCOA | FL |
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.