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 |
|---|---|---|---|---|---|---|
| — | 469-633 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | FRISCO | TX |
| — | 469-658 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | SOUTHWESTERN BELL | 9533 | DE SOTO | TX |
| — | 469-671 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | SOUTHWESTERN BELL TELEPHONE COMPANY - TX | 7726 | LEWISVILLE | TX |
| — | 469-726 | 1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → | SOUTHWESTERN BELL | 9533 | DALLAS | TX |
| — | 469-730 | 0XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → | SOUTHWESTERN BELL | 9533 | DALLAS | TX |
| — | 469-737 | 0XXX9XXX · 2 holders which blocks → | SOUTHWESTERN BELL | 9533 | DALLAS | TX |
| — | 469-742 | 1XXX3XXX which blocks → | SOUTHWESTERN BELL | 9533 | MCKINNEY | TX |
| — | 469-759 | 0XXX1XXX2XXX3XXX6XXX7XXX9XXX · 4 holders which blocks → | SOUTHWESTERN BELL | 9533 | DALLAS | TX |
| — | 469-791 | 7XXX which blocks → | SOUTHWESTERN BELL | 9533 | DALLAS | TX |
| — | 469-814 | 0XXX8XXX9XXX · 2 holders which blocks → | SOUTHWESTERN BELL TELEPHONE COMPANY - TX | 7726 | PLANO | TX |
| — | 469-828 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | SOUTHWESTERN BELL | 9533 | DALLAS | TX |
| — | 469-941 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | SOUTHWESTERN BELL | 9533 | DALLAS | TX |
| — | 469-952 | 0XXX1XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → | SOUTHWESTERN BELL | 9533 | MCKINNEY | 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.