NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 541
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2025-02-18 | 541-288-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-370-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-370-8XXX | 8000–8999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-397-2XXX | 2000–2999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-397-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-705-1XXX | 1000–1999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-705-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-705-8XXX | 8000–8999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-705-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-769-2XXX | 2000–2999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-769-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-769-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-769-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-769-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-769-7XXX | 7000–7999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-769-8XXX | 8000–8999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-769-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-965-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-978-1XXX | 1000–1999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-978-2XXX | 2000–2999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-978-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-978-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-978-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-978-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2025-02-18 | 541-978-7XXX | 7000–7999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | THE DALLES | OR |
| 2021-09-01 | 541-310-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | PENDLETON | OR |
| 2020-09-30 | 541-589-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | BURNS | OR |
| 2020-07-29 | 541-366-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | PORTORFORD | OR |
| 2020-04-03 | 541-251-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | BROOKINGS | OR |
| 2020-03-25 | 541-417-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | LAKEVIEW | OR |
| 2017-08-14 | 541-415-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | CAVE JCT | OR |
| 2016-09-07 | 541-366-0XXX | 0000–0999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | PORTORFORD | OR |
| 2016-03-16 | 541-916-2XXX | 2000–2999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | GRANTSPASS | OR |
| 2015-11-18 | 541-371-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | HERMISTON | OR |
| 2015-05-21 | 541-371-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | HERMISTON | OR |
| 2014-05-02 | 541-314-7XXX | 7000–7999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | HERMISTON | OR |
| 2014-02-12 | 541-303-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | HERMISTON | OR |
| 2012-07-25 | 541-403-3XXX | 3000–3999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | BAKER | OR |
| 2007-09-25 | 541-366-1XXX | 1000–1999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | PORTORFORD | OR |
| 2007-08-31 | 541-260-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | COOS BAY | OR |
| 2007-08-31 | 541-787-5XXX | 5000–5999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | GRANTSPASS | OR |
| 2007-07-12 | 541-720-4XXX | 4000–4999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | HERMISTON | OR |
| 2007-06-13 | 541-637-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | ROSEBURG | OR |
| 2007-06-13 | 541-637-7XXX | 7000–7999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | ROSEBURG | OR |
| 2007-06-13 | 541-637-8XXX | 8000–8999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | ROSEBURG | OR |
| 2007-04-11 | 541-637-9XXX | 9000–9999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | ROSEBURG | OR |
| 2007-03-22 | 541-260-7XXX | 7000–7999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | COOS BAY | OR |
| 2007-03-22 | 541-260-8XXX | 8000–8999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | COOS BAY | OR |
| 2007-03-02 | 541-787-7XXX | 7000–7999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | GRANTSPASS | OR |
| 2007-01-12 | 541-260-6XXX | 6000–6999 | Assigned | UNITED STATES CELLULAR - OR | 6349 | COOS BAY | 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.