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 |
|---|---|---|---|---|---|---|
| 2001-05-22 | 281-747 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | PORTER | TX |
| — | 281-312 | 9XXX which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-319 | not yet reported which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-348 | 5XXX6XXX which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-354 | not yet reported which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | PORTER | TX |
| — | 281-358 | not yet reported which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-359 | not yet reported which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-360 | not yet reported which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-361 | not yet reported which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-429 | 6XXX8XXX · 2 holders which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | PORTER HTS | TX |
| — | 281-441 | 0XXX which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-446 | not yet reported which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-540 | not yet reported which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-548 | not yet reported which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-572 | 0XXX5XXX6XXX8XXX which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | PORTER HTS | TX |
| — | 281-577 | 3XXX4XXX6XXX7XXX · 2 holders which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | PORTER | TX |
| — | 281-641 | not yet reported which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-812 | not yet reported which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-852 | not yet reported which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-913 | 5XXX6XXX9XXX · 3 holders which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
| — | 281-964 | 5XXX7XXX8XXX9XXX which blocks → | BRIGHTSPEED OF TEXAS, INC. | 2114 | HUMBLE | TX |
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.