NumberResearchThousands-blocks in 601-574
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 601-574 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 601 blocks
Most active assignees, all time — NPA 601
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 |
|---|---|---|---|---|---|---|---|
| 2008-11-04 | 601-574-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MS | 992E | HAZLEHURST | MS |
| 2016-10-12 | 601-574-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS | 6396 | HAZLEHURST | MS |
| 2011-02-28 | 601-574-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | HAZLEHURST | MS |
| 2011-02-23 | 601-574-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MS | 4886 | HAZLEHURST | MS |
| — | 601-574-4XXX | 4000–4999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - MS | 5178 | HAZLEHURST | MS |
| 2016-08-05 | 601-574-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MS | 719E | HAZLEHURST | MS |
| 2016-08-05 | 601-574-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MS | 719E | HAZLEHURST | MS |
| 2016-08-19 | 601-574-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA MS - LLC | 458C | HAZLEHURST | MS |
| 2017-01-30 | 601-574-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MS | 992E | HAZLEHURST | MS |
| 2017-06-02 | 601-574-9XXX | 9000–9999 | Assigned | TELNYX LLC | 073H | HAZLEHURST | MS |
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.