NumberResearchThousands-blocks in 580-559
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 580-559 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 580 blocks
Most active assignees, all time — NPA 580
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
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Apr 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 580-559-0XXX | 0000–0999 | Reserved | SOUTHWESTERN BELL | 9533 | ADA | OK |
| 2007-11-02 | 580-559-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ADA | OK |
| 2006-11-20 | 580-559-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | ADA | OK |
| 2008-02-08 | 580-559-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | ADA | OK |
| 2024-09-24 | 580-559-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ADA | OK |
| 2007-02-15 | 580-559-5XXX | 5000–5999 | Assigned | SOUTHWESTERN BELL | 9533 | ADA | OK |
| 2008-03-24 | 580-559-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ADA | OK |
| 2008-04-18 | 580-559-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | ADA | OK |
| 2009-07-07 | 580-559-8XXX | 8000–8999 | Assigned | TELEPORT COMMUNICATIONS AMERICA OK - LLC | 530C | ADA | OK |
| 2007-10-19 | 580-559-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - OK | 6272 | ADA | OK |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.