NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
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.
Most active assignees, all time — NPA 580
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 580-267 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | DEER CREEK | OK |
| — | 580-274 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | LONGDALE | OK |
| — | 580-335 | none assigned yet which blocks → | PIONEER TEL. COOP., INC. | 2018 | FREDERICK | OK |
| — | 580-342 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | TEMPLE | OK |
| — | 580-388 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | LAMONT | OK |
| — | 580-393 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | SENTINEL | OK |
| — | 580-397 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | MANITOU | OK |
| — | 580-435 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | HOPETON | OK |
| — | 580-438 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | CLEO SPG | OK |
| — | 580-439 | none assigned yet which blocks → | PIONEER TEL. COOP., INC. | 2018 | COMANCHE | OK |
| — | 580-455 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | ORLANDO | OK |
| — | 580-463 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | ALINE | OK |
| — | 580-479 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | GRANDFIELD | OK |
| — | 580-486 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | CARTER | OK |
| — | 580-493 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | DRUMMOND | OK |
| — | 580-532 | none assigned yet which blocks → | PIONEER TEL. COOP., INC. | 2018 | POND CREEK | OK |
| — | 580-537 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | LOCO | OK |
| — | 580-568 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | DAVIDSON | OK |
| — | 580-582 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | PUTNAM | OK |
| — | 580-588 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | APACHE | OK |
| — | 580-593 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | CUSTERCITY | OK |
| — | 580-594 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | WAKITA | OK |
| — | 580-597 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | CHATTANOGA | OK |
| — | 580-614 | none assigned yet which blocks → | PIONEER TEL. COOP., INC. | 2018 | WATONGA | OK |
| — | 580-621 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | FREEDOM | OK |
| — | 580-623 | none assigned yet which blocks → | PIONEER TEL. COOP., INC. | 2018 | WATONGA | OK |
| — | 580-661 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | THOMAS | OK |
| — | 580-667 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | TIPTON | OK |
| — | 580-676 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | GOULD | OK |
| — | 580-684 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | HUNTER | OK |
| — | 580-688 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | HOLLIS | OK |
| — | 580-689 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | MAY | OK |
| — | 580-697 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | QUINLAN | OK |
| — | 580-698 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | FARGO | OK |
| — | 580-727 | none assigned yet which blocks → | PIONEER TEL. COOP., INC. | 2018 | SELMAN | OK |
| — | 580-735 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | BUFFALO | OK |
| — | 580-753 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | AMES | OK |
| — | 580-764 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | CHESTER | OK |
| — | 580-766 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | FORTSUPPLY | OK |
| — | 580-776 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | MENO | OK |
| — | 580-796 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | LAHOMA | OK |
| — | 580-822 | none assigned yet which blocks → | PIONEER TEL. COOP., INC. | 2018 | OKEENE | OK |
| — | 580-824 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | WAYNOKA | OK |
| — | 580-839 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | NASH | OK |
| — | 580-852 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | HELENA | OK |
| — | 580-862 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | DOUGLAS | OK |
| — | 580-863 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | GARBER | OK |
| — | 580-864 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | COVINGTON | OK |
| — | 580-866 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | SHARON | OK |
| — | 580-871 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | DACOMA | OK |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.