NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

6 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 575
T-MOBILE USA, INC. 6
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
2026-09-14 575-243-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARTESIA NM
2026-08-21 575-306-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ROSWELL NM
2026-08-21 575-306-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ROSWELL NM
2026-08-21 575-306-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ROSWELL NM
2026-08-21 575-306-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ROSWELL NM
2026-08-21 575-326-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ANTHONY NM
2025-12-04 575-348-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2025-10-28 575-348-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2025-09-24 575-551-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2025-08-20 575-314-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2025-07-22 575-344-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CANNON AFB NM
2025-07-16 575-329-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CANNON AFB NM
2025-07-14 575-565-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNA TERESA NM
2025-06-26 575-324-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2025-06-26 575-324-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2025-06-16 575-310-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RUIDOSO NM
2025-06-05 575-442-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2025-03-24 575-262-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ANTHONY NM
2024-09-13 575-328-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SILVERCITY NM
2024-08-15 575-260-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RUIDOSODWN NM
2024-07-29 575-242-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SILVERCITY NM
2024-03-06 575-284-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SILVERCITY NM
2024-01-23 575-316-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TAOS NM
2023-09-29 575-310-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RUIDOSO NM
2022-12-28 575-832-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TUCUMCARI NM
2022-08-23 575-240-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TAOS NM
2022-08-23 575-454-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RUIDOSO NM
2022-08-11 575-270-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LAS CRUCES NM
2022-08-05 575-284-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SILVERCITY NM
2022-08-05 575-284-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SILVERCITY NM
2022-07-12 575-299-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 DEMING NM
2022-05-25 575-240-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TAOS NM
2022-05-25 575-463-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LAS CRUCES NM
2022-05-25 575-463-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LAS CRUCES NM
2022-05-25 575-463-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LAS CRUCES NM
2022-05-25 575-463-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LAS CRUCES NM
2022-05-25 575-463-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LAS CRUCES NM
2022-03-22 575-283-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ANTHONY NM
2022-03-22 575-966-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LA MESA NM
2022-03-09 575-299-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DEMING NM
2022-02-28 575-295-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2022-02-28 575-295-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2022-02-09 575-284-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SILVERCITY NM
2022-01-26 575-832-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TUCUMCARI NM
2022-01-08 575-270-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LAS CRUCES NM
2022-01-08 575-270-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LAS CRUCES NM
2022-01-08 575-270-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LAS CRUCES NM
2021-12-08 575-271-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CLOVIS NM
2021-12-08 575-271-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CLOVIS NM
2021-12-03 575-240-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TAOS NM

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.