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 |
|---|---|---|---|---|---|---|
| 2021-03-03 | 580-586 | 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | WICHITA ONLINE, INC. - OK | 258F | WAURIKA | OK |
| 2021-01-12 | 580-944 | 0XXX1XXX4XXX · 3 holders which blocks → | WICHITA ONLINE, INC. - OK | 258F | GOTEBO | OK |
| 2014-10-01 | 580-454 | not yet reported which blocks → | WICHITA ONLINE, INC. - OK | 258F | ELGIN | OK |
| 2014-10-01 | 580-598 | not yet reported which blocks → | WICHITA ONLINE, INC. - OK | 258F | FLETCHER | OK |
| 2014-10-01 | 580-717 | not yet reported which blocks → | WICHITA ONLINE, INC. - OK | 258F | ROOSEVELT | OK |
| 2014-10-01 | 580-957 | not yet reported which blocks → | WICHITA ONLINE, INC. - OK | 258F | CYRIL | OK |
| 2014-10-01 | 580-966 | not yet reported which blocks → | WICHITA ONLINE, INC. - OK | 258F | MT VIEW | OK |
| 2014-09-25 | 580-315 | not yet reported which blocks → | WICHITA ONLINE, INC. - OK | 258F | STERLING | OK |
| 2011-04-20 | 580-350 | 0–9 XXXall 10 · 6 holders which blocks → | WICHITA ONLINE, INC. - OK | 258F | LAWTON | OK |
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.