NumberResearchThousands-blocks in 580-741
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 580-741 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
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 580-741-0XXX | 0000–0999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MEDFORD | OK |
| — | 580-741-1XXX | 1000–1999 | Reserved | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MEDFORD | OK |
| 2016-06-01 | 580-741-2XXX | 2000–2999 | Assigned | ONVOY, LLC - OK | 409F | MEDFORD | OK |
| 2016-06-01 | 580-741-3XXX | 3000–3999 | Assigned | ONVOY, LLC - OK | 409F | MEDFORD | OK |
| 2017-06-12 | 580-741-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK | 7258 | MEDFORD | OK |
| — | 580-741-5XXX | 5000–5999 | Available | MEDFORD | OK | ||
| 2020-02-21 | 580-741-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA OK - LLC | 530C | MEDFORD | OK |
| 2021-05-28 | 580-741-7XXX | 7000–7999 | Assigned | ONVOY, LLC - OK | 409F | MEDFORD | OK |
| — | 580-741-8XXX | 8000–8999 | Available | MEDFORD | OK | ||
| — | 580-741-9XXX | 9000–9999 | Available | MEDFORD | 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.