NumberResearchThousands-blocks in 541-228
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 541-228 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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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 541-228-0XXX | 0000–0999 | Reserved | T-MOBILE USA, INC. | 6529 | EUGENE | OR |
| — | 541-228-1XXX | 1000–1999 | Reserved | T-MOBILE USA, INC. | 6529 | EUGENE | OR |
| 2007-11-20 | 541-228-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | EUGENE | OR |
| 2004-11-02 | 541-228-3XXX | 3000–3999 | Assigned | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 7172 | EUGENE | OR |
| 2004-12-28 | 541-228-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC | 6010 | EUGENE | OR |
| 2005-10-10 | 541-228-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | EUGENE | OR |
| — | 541-228-6XXX | 6000–6999 | Reserved | METROPCS, INC. | 5562 | EUGENE | OR |
| — | 541-228-7XXX | 7000–7999 | Reserved | T-MOBILE USA, INC. | 6529 | EUGENE | OR |
| 2007-06-06 | 541-228-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR | 5820 | EUGENE | OR |
| 2006-10-10 | 541-228-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | EUGENE | 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.