NumberResearchThousands-blocks in 541-576
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 541-576 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
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 |
|---|---|---|---|---|---|---|---|
| 2012-11-16 | 541-576-0XXX | 0000–0999 | Assigned | ONVOY, LLC - OR | 750E | SILVERLAKE | OR |
| 2012-11-16 | 541-576-1XXX | 1000–1999 | Assigned | ONVOY, LLC - OR | 750E | SILVERLAKE | OR |
| — | 541-576-2XXX | 2000–2999 | Reserved | CENTURYTEL OF OREGON, INC. DBA CENTURYLINK | 2360 | SILVERLAKE | OR |
| — | 541-576-3XXX | 3000–3999 | Reserved | CENTURYTEL OF OREGON, INC. DBA CENTURYLINK | 2360 | SILVERLAKE | OR |
| 2008-07-31 | 541-576-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | SILVERLAKE | OR |
| — | 541-576-5XXX | 5000–5999 | Available | SILVERLAKE | OR | ||
| 2013-10-28 | 541-576-6XXX | 6000–6999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | SILVERLAKE | OR |
| 2008-08-22 | 541-576-7XXX | 7000–7999 | Assigned | ONVOY, LLC - OR | 750E | SILVERLAKE | OR |
| 2011-06-24 | 541-576-8XXX | 8000–8999 | Assigned | ONVOY, LLC - OR | 750E | SILVERLAKE | OR |
| 2014-06-17 | 541-576-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | SILVERLAKE | OR |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.