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 |
|---|---|---|---|---|---|---|
| — | 605-258 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | ONIDA | SD |
| — | 605-264 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | ONIDA | SD |
| — | 605-266 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | HITCHCOCK | SD |
| — | 605-285 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | BOWDLE | SD |
| — | 605-287 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | ROSCOE | SD |
| — | 605-324 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | CRESBARD | SD |
| — | 605-325 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | PIERPONT | SD |
| — | 605-392 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | ORIENT | SD |
| — | 605-436 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | SENECA | SD |
| — | 605-442 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | TOLSTOY | SD |
| — | 605-447 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | ONAKA | SD |
| — | 605-448 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | BRITTON | SD |
| — | 605-458 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | WESSINGTON | SD |
| — | 605-486 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | ROSLYN | SD |
| — | 605-493 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | LANGFORD | SD |
| — | 605-537 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | ROSHOLT | SD |
| — | 605-539 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | WESIGTNSPG | SD |
| — | 605-596 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | TULARE | SD |
| — | 605-598 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | FAULKTON | SD |
| — | 605-649 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | SELBY | SD |
| — | 605-698 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | SISSETON | SD |
| — | 605-742 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | SISSETON | SD |
| — | 605-765 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | GETTYSBURG | SD |
| — | 605-768 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | LEBANON | SD |
| — | 605-852 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | HIGHMORE | SD |
| — | 605-875 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | HARROLD | SD |
| — | 605-943 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | REEHEIGHTS | SD |
| — | 605-948 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | HOVEN | SD |
| — | 605-962 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | BLUNT | SD |
| — | 605-973 | not yet reported which blocks → | VENTURE COMMUNICATIONS COOPERATIVE | 1680 | ONIDA | SD |
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.