NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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 425
NEW CINGULAR WIRELESS PCS, LLC 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
2021-11-02 425-506-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2021-11-02 425-506-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2021-11-02 425-506-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2021-11-02 425-506-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2021-11-02 425-506-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2021-11-02 425-506-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2021-11-02 425-506-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2021-11-02 425-539-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F EVERETT WA
2021-10-28 425-370-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-10-28 425-370-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-10-27 425-469-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-10-27 425-469-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-10-27 425-469-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-10-27 425-469-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-10-25 425-966-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E SNOQUMPASS WA
2021-10-25 425-966-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E SNOQUMPASS WA
2021-10-22 425-842-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E NORTH BEND WA
2021-10-22 425-842-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E NORTH BEND WA
2021-10-22 425-842-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E NORTH BEND WA
2021-10-22 425-946-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E CARNATION WA
2021-10-18 425-448-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2021-10-04 425-340-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2021-10-01 425-663-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2021-10-01 425-663-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2021-10-01 425-996-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2021-09-22 425-469-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-09-22 425-469-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-09-22 425-469-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-09-22 425-469-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-09-22 425-469-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-09-22 425-469-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-09-13 425-331-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ISSAQUAH WA
2021-09-13 425-331-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ISSAQUAH WA
2021-09-13 425-477-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H ISSAQUAH WA
2021-09-13 425-477-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ISSAQUAH WA
2021-09-13 425-477-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H ISSAQUAH WA
2021-09-13 425-477-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H ISSAQUAH WA
2021-09-13 425-477-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H ISSAQUAH WA
2021-09-10 425-364-7XXX 7000–7999Assigned COMMIO, LLC 939H BOTHELL WA
2021-09-10 425-517-4XXX 4000–4999Assigned COMMIO, LLC 939H RENTON WA
2021-09-10 425-517-5XXX 5000–5999Assigned COMMIO, LLC 939H RENTON WA
2021-09-10 425-517-6XXX 6000–6999Assigned COMMIO, LLC 939H RENTON WA
2021-09-10 425-537-2XXX 2000–2999Assigned COMMIO, LLC 939H BOTHELL WA
2021-09-10 425-537-8XXX 8000–8999Assigned COMMIO, LLC 939H BOTHELL WA
2021-08-27 425-738-3XXX 3000–3999Assigned TELNYX LLC 073H RENTON WA
2021-08-27 425-738-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2021-08-25 425-966-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SNOQUMPASS WA
2021-08-23 425-539-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2021-08-23 425-539-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2021-08-19 425-758-6XXX 6000–6999Assigned FRACTEL, LLC 965H HALLS LAKE WA

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.