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 |
|---|---|---|---|---|---|---|
| 2013-12-17 | 321-316 | 0–9 XXXall 10 · 5 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | WINTERPARK | FL |
| 2013-02-21 | 321-337 | 0–9 XXXall 10 · 3 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | KISSIMMEE | FL |
| 2006-09-22 | 321-527 | 0–9 XXXall 10 · 3 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | WINTERPARK | FL |
| 2002-03-27 | 321-303 | none assigned yet which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | WINTERPARK | FL |
| — | 321-228 | none assigned yet which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | WINTERPARK | FL |
| — | 321-277 | none assigned yet which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | WINTERPARK | FL |
| — | 321-279 | 2XXX which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | WINTERPARK | FL |
| — | 321-356 | 2XXX which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | WINTERPARK | FL |
| — | 321-422 | 0–9 XXXall 10 · 6 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | WINTERPARK | FL |
| — | 321-439 | 0XXX2XXX which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | WINTERPARK | FL |
| — | 321-443 | none assigned yet which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | KISSIMMEE | FL |
| — | 321-517 | 0–9 XXXall 10 · 5 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | KENANSVL | 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.