NumberResearchThousands-blocks in 580-453
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 580-453 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
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2011-01-11 | 580-453-0XXX | 0000–0999 | Assigned | UNITED STATES CELLULAR - OK | 6272 | ADA | OK |
| 2011-08-23 | 580-453-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ADA | OK |
| 2026-04-07 | 580-453-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | ADA | OK |
| 2011-06-07 | 580-453-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK | 7258 | ADA | OK |
| 2016-02-24 | 580-453-4XXX | 4000–4999 | Assigned | ONVOY, LLC - OK | 409F | ADA | OK |
| 2024-09-24 | 580-453-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ADA | OK |
| 2012-08-01 | 580-453-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OK | 5257 | ADA | OK |
| 2009-12-14 | 580-453-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | ADA | OK |
| 2023-05-04 | 580-453-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ADA | OK |
| 2011-01-24 | 580-453-9XXX | 9000–9999 | Assigned | ONVOY, LLC - OK | 409F | ADA | 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.