NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
T-MOBILE USA, INC. 175
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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2026-01-06 541-707-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 REEDSPORT OR
2026-01-06 541-716-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HOOD RIVER OR
2025-12-17 541-965-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 THE DALLES OR
2025-10-24 541-243-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CORVALLIS OR
2025-04-08 541-418-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LINCOLN CY OR
2025-03-21 541-309-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LAKEVIEW OR
2025-03-21 541-508-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BEND OR
2025-03-21 541-508-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BEND OR
2025-03-21 541-628-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 JOHN DAY OR
2025-03-21 541-728-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BEND OR
2023-12-04 541-675-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MADRAS OR
2022-11-09 541-578-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MOSIER OR
2022-10-10 541-310-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PENDLETON OR
2021-11-17 541-397-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 THE DALLES OR
2021-11-17 541-397-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 THE DALLES OR
2021-11-08 541-675-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MADRAS OR
2021-11-08 541-936-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ALBANY OR
2021-10-22 541-286-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CORVALLIS OR
2021-10-22 541-887-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 KLAMATHFLS OR
2021-10-08 541-624-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LA GRANDE OR
2021-10-08 541-656-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 HERMISTON OR
2021-09-17 541-300-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 THE DALLES OR
2021-08-19 541-310-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PENDLETON OR
2021-05-27 541-622-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MEDFORD OR
2021-05-27 541-841-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MEDFORD OR
2021-01-30 541-624-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LA GRANDE OR
2021-01-29 541-252-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COOS BAY OR
2021-01-29 541-901-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FLORENCE OR
2021-01-07 541-250-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CORVALLIS OR
2020-05-06 541-300-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 THE DALLES OR
2019-09-05 541-300-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 THE DALLES OR
2017-10-02 541-880-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KLAMATHFLS OR
2017-09-29 541-360-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CORVALLIS OR
2017-06-09 541-239-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BAKER OR
2016-09-20 541-780-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EUGENE OR
2016-09-20 541-780-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EUGENE OR
2016-09-13 541-400-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HOOD RIVER OR
2016-08-15 541-841-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MEDFORD OR
2016-08-08 541-650-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EUGENE OR
2016-08-08 541-650-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EUGENE OR
2016-08-08 541-650-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EUGENE OR
2016-08-08 541-799-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EUGENE OR
2016-07-13 541-900-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ROSEBURG OR
2016-06-13 541-650-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EUGENE OR
2016-03-31 541-780-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 EUGENE OR
2016-01-27 541-930-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MEDFORD OR
2016-01-20 541-666-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ALBANY OR
2016-01-20 541-666-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ALBANY OR
2016-01-20 541-780-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EUGENE OR
2015-09-28 541-799-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 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.