NumberResearchThousands-blocks in 539-577
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 539-577 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 539 blocks
Most active assignees, all time — NPA 539
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 |
|---|---|---|---|---|---|---|---|
| 2021-02-05 | 539-577-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | MIAMI | OK |
| 2021-01-13 | 539-577-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK | 5813 | MIAMI | OK |
| 2022-07-14 | 539-577-2XXX | 2000–2999 | Assigned | COMMIO, LLC | 939H | MIAMI | OK |
| 2022-08-29 | 539-577-3XXX | 3000–3999 | Assigned | ONVOY, LLC - OK | 409F | MIAMI | OK |
| 2021-05-28 | 539-577-4XXX | 4000–4999 | Assigned | T-MOBILE USA, INC. | 6529 | MIAMI | OK |
| 2020-11-25 | 539-577-5XXX | 5000–5999 | Assigned | ONVOY, LLC - OK | 409F | MIAMI | OK |
| 2020-11-25 | 539-577-6XXX | 6000–6999 | Assigned | ONVOY, LLC - OK | 409F | MIAMI | OK |
| 2020-07-15 | 539-577-7XXX | 7000–7999 | Assigned | FRACTEL, LLC | 965H | MIAMI | OK |
| 2021-05-28 | 539-577-8XXX | 8000–8999 | Assigned | T-MOBILE USA, INC. | 6529 | MIAMI | OK |
| 2021-05-28 | 539-577-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | MIAMI | 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.