NumberResearchThousands-blocks in 580-350
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 580-350 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
May 2026
Apr 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2011-11-18 | 580-350-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK | 5813 | LAWTON | OK |
| 2011-04-22 | 580-350-1XXX | 1000–1999 | Assigned | WICHITA ONLINE, INC. - OK | 258F | LAWTON | OK |
| 2014-09-16 | 580-350-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | LAWTON | OK |
| 2013-12-06 | 580-350-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK | 7258 | LAWTON | OK |
| 2017-02-08 | 580-350-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | LAWTON | OK |
| 2017-03-09 | 580-350-5XXX | 5000–5999 | Assigned | TELNYX LLC | 073H | LAWTON | OK |
| 2015-10-08 | 580-350-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | LAWTON | OK |
| 2011-11-16 | 580-350-7XXX | 7000–7999 | Assigned | T-MOBILE USA, INC. | 6529 | LAWTON | OK |
| 2011-11-16 | 580-350-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | LAWTON | OK |
| 2011-11-16 | 580-350-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | LAWTON | OK |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.