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 |
|---|---|---|---|---|---|---|
| — | 701-594 | 0XXX1XXX7XXX · 3 holders which blocks → | QWEST CORPORATION | 9631 | EMERADO | ND |
| — | 701-599 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | QWEST CORPORATION | 9631 | THOMPSON | ND |
| — | 701-642 | 0XXX which blocks → | QWEST CORPORATION | 9631 | WAHPETON | ND |
| — | 701-663 | not yet reported which blocks → | QWEST CORPORATION | 9631 | BISMARCK | ND |
| — | 701-667 | not yet reported which blocks → | QWEST CORPORATION | 9631 | BISMARCK | ND |
| — | 701-671 | 0XXX5XXX8XXX9XXX · 4 holders which blocks → | QWEST CORPORATION | 9631 | WAHPETON | ND |
| — | 701-696 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | QWEST CORPORATION | 9631 | MANVEL | ND |
| — | 701-732 | 0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → | QWEST CORPORATION | 9631 | GRANDFORKS | ND |
| — | 701-744 | not yet reported which blocks → | QWEST CORPORATION | 9636 | E FAIRVIEW | ND |
| — | 701-746 | not yet reported which blocks → | QWEST CORPORATION | 9631 | GRANDFORKS | ND |
| — | 701-747 | 0XXX9XXX · 2 holders which blocks → | QWEST CORPORATION | 9631 | EMERADO | ND |
| — | 701-772 | not yet reported which blocks → | QWEST CORPORATION | 9631 | GRANDFORKS | ND |
| — | 701-775 | not yet reported which blocks → | QWEST CORPORATION | 9631 | GRANDFORKS | ND |
| — | 701-777 | not yet reported which blocks → | QWEST CORPORATION | 9631 | GRANDFORKS | ND |
| — | 701-780 | not yet reported which blocks → | QWEST CORPORATION | 9631 | GRANDFORKS | ND |
| — | 701-786 | 1XXX6XXX7XXX8XXX · 3 holders which blocks → | QWEST CORPORATION | 9631 | MAYVILLE | ND |
| — | 701-787 | 1XXX which blocks → | QWEST CORPORATION | 9631 | GRANDFORKS | ND |
| — | 701-792 | 6XXX7XXX8XXX · 3 holders which blocks → | QWEST CORPORATION | 9631 | GRANDFORKS | ND |
| — | 701-795 | not yet reported which blocks → | QWEST CORPORATION | 9631 | GRANDFORKS | ND |
| — | 701-845 | not yet reported which blocks → | QWEST CORPORATION | 9631 | VALLEYCITY | ND |
| — | 701-847 | 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | QWEST CORPORATION | 9631 | REYNOLDS | ND |
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.