NumberResearchThousands-blocks in 541-595
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 541-595 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 541 blocks
Most active assignees, all time — NPA 541
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 541-595-0XXX | 0000–0999 | Reserved | QWEST CORPORATION | 9638 | BLACKBUTTE | OR |
| — | 541-595-1XXX | 1000–1999 | Reserved | QWEST CORPORATION | 9638 | BLACKBUTTE | OR |
| — | 541-595-2XXX | 2000–2999 | Reserved | QWEST CORPORATION | 9638 | BLACKBUTTE | OR |
| 2006-07-26 | 541-595-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | BLACKBUTTE | OR |
| 2025-09-11 | 541-595-4XXX | 4000–4999 | Assigned | TDS BROADBAND SERVICE LLC | 641H | BLACKBUTTE | OR |
| — | 541-595-5XXX | 5000–5999 | Reserved | QWEST CORPORATION | 9638 | BLACKBUTTE | OR |
| — | 541-595-6XXX | 6000–6999 | Reserved | QWEST CORPORATION | 9638 | BLACKBUTTE | OR |
| 2007-03-23 | 541-595-7XXX | 7000–7999 | Assigned | ONVOY, LLC - OR | 750E | BLACKBUTTE | OR |
| 2008-10-30 | 541-595-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - OR | 076F | BLACKBUTTE | OR |
| 2008-01-31 | 541-595-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | BLACKBUTTE | OR |
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.