NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026
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 |
|---|---|---|---|---|---|---|
| — | 580-883 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | RINGWOOD | OK |
| — | 580-885 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | ARNETT | OK |
| — | 580-886 | none assigned yet which blocks → | PIONEER TEL. COOP., INC. | 2018 | CANTON | OK |
| — | 580-887 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | FAY | OK |
| — | 580-891 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | OAKWOOD | OK |
| — | 580-922 | none assigned yet which blocks → | PIONEER TEL. COOP., INC. | 2018 | SEILING | OK |
| — | 580-923 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | GAGE | OK |
| — | 580-935 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | MARSHALL | OK |
| — | 580-938 | none assigned yet which blocks → | PIONEER TEL. COOP., INC. | 2018 | SHATTUCK | OK |
| — | 580-939 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | HARMON | OK |
| — | 580-963 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | HASTINGS | OK |
| — | 580-987 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | CARMEN | OK |
| — | 580-989 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | MUTUAL | OK |
| — | 580-994 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | MOORELAND | OK |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.