NumberResearchThousands-blocks in 541-633
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 541-633 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 |
|---|---|---|---|---|---|---|---|
| 2006-03-07 | 541-633-0XXX | 0000–0999 | Assigned | T-MOBILE USA, INC. | 6529 | BEND | OR |
| 2006-02-07 | 541-633-1XXX | 1000–1999 | Assigned | QWEST CORPORATION | 9638 | BEND | OR |
| 2006-02-07 | 541-633-2XXX | 2000–2999 | Assigned | QWEST CORPORATION | 9638 | BEND | OR |
| 2006-03-29 | 541-633-3XXX | 3000–3999 | Assigned | T-MOBILE USA, INC. | 6529 | BEND | OR |
| 2006-12-01 | 541-633-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BEND | OR |
| 2006-05-04 | 541-633-5XXX | 5000–5999 | Assigned | T-MOBILE USA, INC. | 6529 | BEND | OR |
| 2006-05-04 | 541-633-6XXX | 6000–6999 | Assigned | T-MOBILE USA, INC. | 6529 | BEND | OR |
| 2006-06-05 | 541-633-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - OR | 3234 | BEND | OR |
| 2007-02-16 | 541-633-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | BEND | OR |
| 2006-07-10 | 541-633-9XXX | 9000–9999 | Assigned | T-MOBILE USA, INC. | 6529 | BEND | 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.