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
2022-09-06 425-546-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-09-06 425-546-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-09-06 425-546-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-09-06 425-683-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E EVERETT WA
2022-09-02 425-543-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-09-01 425-552-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2022-09-01 425-552-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2022-09-01 425-552-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2022-09-01 425-552-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2022-09-01 425-552-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2022-08-29 425-380-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2022-08-29 425-380-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2022-08-26 425-547-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E RENTON WA
2022-08-26 425-547-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E RENTON WA
2022-08-26 425-547-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E RENTON WA
2022-08-24 425-569-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E MAPLE VLY WA
2022-08-24 425-569-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E MAPLE VLY WA
2022-08-19 425-400-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E AMES LAKE WA
2022-08-18 425-547-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2022-08-18 425-547-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2022-08-18 425-547-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2022-08-17 425-683-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H EVERETT WA
2022-08-17 425-683-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H EVERETT WA
2022-08-17 425-683-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H EVERETT WA
2022-08-17 425-683-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H EVERETT WA
2022-08-17 425-683-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H EVERETT WA
2022-08-16 425-545-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2022-08-05 425-543-0XXX 0000–0999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE WA
2022-08-05 425-543-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE WA
2022-07-29 425-475-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2022-07-29 425-490-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E FALL CITY WA
2022-07-29 425-832-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2022-07-20 425-340-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2022-07-20 425-340-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2022-07-20 425-340-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2022-07-20 425-475-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2022-07-20 425-475-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2022-07-20 425-510-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2022-07-20 425-510-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2022-07-20 425-543-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-07-20 425-543-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-07-20 425-543-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-07-20 425-543-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-07-20 425-543-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-07-20 425-543-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-07-20 425-683-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2022-07-20 425-683-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2022-07-20 425-683-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2022-07-19 425-541-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E EVERETT WA
2022-07-19 425-541-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E EVERETT 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.