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 |
|---|---|---|---|---|---|---|
| 2005-01-24 | 205-449 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 TELECOM OF ALABAMA, LLC - AL | 7327 | BIRMINGHAM | AL |
| 2002-02-05 | 205-461 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | LEVEL 3 TELECOM OF ALABAMA, LLC - AL | 7327 | BESSEMER | AL |
| — | 205-263 | not yet reported which blocks → | LEVEL 3 TELECOM OF ALABAMA, LLC - AL | 7327 | BIRMINGHAM | AL |
| — | 205-271 | not yet reported which blocks → | LEVEL 3 TELECOM OF ALABAMA, LLC - AL | 7327 | BIRMINGHAM | AL |
| — | 205-278 | none assigned yet which blocks → | LEVEL 3 TELECOM OF ALABAMA, LLC - AL | 7327 | BIRMINGHAM | AL |
| — | 205-332 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 TELECOM OF ALABAMA, LLC - AL | 7327 | BIRMINGHAM | AL |
| — | 205-406 | 5XXX6XXX7XXX8XXX · 2 holders which blocks → | LEVEL 3 TELECOM OF ALABAMA, LLC - AL | 7327 | ALABASTER | AL |
| — | 205-439 | not yet reported which blocks → | LEVEL 3 TELECOM OF ALABAMA, LLC - AL | 7327 | BIRMINGHAM | AL |
| — | 205-443 | not yet reported which blocks → | LEVEL 3 TELECOM OF ALABAMA, LLC - AL | 7327 | BIRMINGHAM | AL |
| — | 205-484 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 TELECOM OF ALABAMA, LLC - AL | 7327 | BIRMINGHAM | AL |
| — | 205-776 | 6XXX8XXX which blocks → | LEVEL 3 TELECOM OF ALABAMA, LLC - AL | 7327 | BIRMINGHAM | AL |
| — | 205-795 | none assigned yet which blocks → | LEVEL 3 TELECOM OF ALABAMA, LLC - AL | 7327 | BIRMINGHAM | AL |
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.