NumberResearchRecent prefix assignments
1 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 |
|---|---|---|---|---|---|---|
| — | 580-986 | not yet reported which blocks → | CHEROKEE TEL. CO. | 1979 | ATWOOD | OK |
| — | 580-987 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | CARMEN | OK |
| — | 580-988 | not yet reported which blocks → | OK | |||
| — | 580-989 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | MUTUAL | OK |
| — | 580-991 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | TONKAWA | OK |
| — | 580-992 | 0XXX1XXX2XXX6XXX · 3 holders which blocks → | ONVOY, LLC - OK | 409F | NEWKIRK | OK |
| — | 580-993 | none assigned yet which blocks → | CHICKASAW TEL. CO. | 1980 | DOUGHERTY | OK |
| — | 580-994 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | MOORELAND | OK |
| — | 580-995 | not yet reported which blocks → | DOBSON TEL. CO. | 1988 | VICI | OK |
| — | 580-996 | 0XXX2XXX6XXX9XXX · 3 holders which blocks → | PEERLESS NETWORK OF OKLAHOMA, LLC - OK | 384H | MEDFORD | OK |
| — | 580-997 | 0–9 XXXall 10 · 6 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA OK - LLC | 530C | CHEROKEE | OK |
| — | 580-999 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | XXXXXXXXXX | 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.