NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

2 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, last 30 days — NPA 564
T-MOBILE USA, INC. 2
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
2026-09-08 564-268-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MT VERNON WA
2026-09-08 564-268-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MT VERNON WA
2024-09-16 564-260-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MT VERNON WA
2024-08-16 564-224-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2024-08-16 564-259-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2024-08-15 564-235-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BUCKLEY WA
2024-08-15 564-235-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BUCKLEY WA
2024-06-27 564-228-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2024-06-27 564-228-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2024-06-27 564-544-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2024-06-10 564-235-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BUCKLEY WA
2024-05-13 564-228-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2024-05-13 564-228-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2024-05-13 564-228-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2024-02-16 564-237-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 VANCOUVER WA
2024-02-16 564-258-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 VANCOUVER WA
2023-12-05 564-228-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2023-12-05 564-228-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2023-11-03 564-206-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2023-11-03 564-206-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2023-11-03 564-206-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2023-10-17 564-239-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LONGVIEW WA
2023-10-17 564-239-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LONGVIEW WA
2023-08-28 564-228-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2023-08-11 564-202-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2023-08-11 564-206-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2023-08-11 564-230-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2023-08-11 564-230-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2023-08-11 564-262-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LONGVIEW WA
2023-05-26 564-230-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2023-05-26 564-230-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2023-05-26 564-230-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2023-01-27 564-262-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LONGVIEW WA
2022-12-12 564-212-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2022-12-12 564-228-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ABERDEEN WA
2022-11-15 564-226-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2022-11-14 564-218-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2022-11-14 564-218-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2022-11-14 564-218-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2022-10-03 564-235-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BUCKLEY WA
2022-10-03 564-235-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BUCKLEY WA
2022-10-03 564-262-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LONGVIEW WA
2022-09-20 564-227-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 VANCOUVER WA
2022-09-20 564-227-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 VANCOUVER WA
2022-09-20 564-227-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 VANCOUVER WA
2022-09-20 564-227-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 VANCOUVER WA
2022-09-02 564-218-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2022-09-02 564-218-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2022-09-02 564-218-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA
2022-09-02 564-218-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BREMERTON WA

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.