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 |
|---|---|---|---|---|---|---|
| — | 541-424 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | BELLFONTAN | OR |
| — | 541-438 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | HARLAN | OR |
| — | 541-453 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | BLODGETT | OR |
| — | 541-456 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | SUMMIT | OR |
| — | 541-486 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | LOBSTERVLY | OR |
| — | 541-487 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | ALSEA | OR |
| — | 541-528 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | TIDEWATER | OR |
| — | 541-547 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | YACHATS | OR |
| — | 541-563 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | WALDPORT | OR |
| — | 541-867 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | SOUTHBEACH | OR |
| — | 541-875 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | CHITWOOD | OR |
| — | 541-925 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | HORTON | OR |
| — | 541-927 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | TRIANGLELK | OR |
| — | 541-929 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | PHILOMATH | OR |
| — | 541-964 | not yet reported which blocks → | PIONEER TEL. COOPERATIVE | 2393 | TRIANGLELK | OR |
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.