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 |
|---|---|---|---|---|---|---|
| 2016-07-25 | 717-807 | 0XXX2XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → | WINDSTREAM D&E, INC. | 0165 | LITITZ | PA |
| 2011-07-15 | 717-863 | 0–9 XXXall 10 · 7 holders which blocks → | WINDSTREAM D&E, INC. | 0165 | EPHRATA | PA |
| — | 717-335 | 1XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | WINDSTREAM D&E, INC. | 0165 | DENVER | PA |
| — | 717-336 | not yet reported which blocks → | WINDSTREAM D&E, INC. | 0165 | DENVER | PA |
| — | 717-484 | 3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | WINDSTREAM D&E, INC. | 0165 | ADAMSTOWN | PA |
| — | 717-625 | 5XXX8XXX · 2 holders which blocks → | WINDSTREAM D&E, INC. | 0165 | LITITZ | PA |
| — | 717-626 | not yet reported which blocks → | WINDSTREAM D&E, INC. | 0165 | LITITZ | PA |
| — | 717-627 | not yet reported which blocks → | WINDSTREAM D&E, INC. | 0165 | LITITZ | PA |
| — | 717-664 | not yet reported which blocks → | WINDSTREAM D&E, INC. | 0165 | MANHEIM | PA |
| — | 717-665 | not yet reported which blocks → | WINDSTREAM D&E, INC. | 0165 | MANHEIM | PA |
| — | 717-721 | 0XXX which blocks → | WINDSTREAM D&E, INC. | 0165 | EPHRATA | PA |
| — | 717-733 | not yet reported which blocks → | WINDSTREAM D&E, INC. | 0165 | EPHRATA | PA |
| — | 717-738 | not yet reported which blocks → | WINDSTREAM D&E, INC. | 0165 | EPHRATA | PA |
| — | 717-859 | 0XXX9XXX · 2 holders which blocks → | WINDSTREAM D&E, INC. | 0165 | AKRON | PA |
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.