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
2022-07-19 425-541-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E EVERETT WA
2022-07-14 425-540-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2022-07-14 425-540-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2022-07-14 425-540-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2022-07-14 425-540-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2022-07-07 425-400-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E AMES LAKE WA
2022-06-30 425-545-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2022-06-22 425-758-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2022-06-22 425-758-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2022-06-22 425-758-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2022-06-22 425-758-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2022-06-09 425-545-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2022-06-09 425-545-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2022-06-09 425-545-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2022-06-07 425-475-5XXX 5000–5999Assigned COMMIO, LLC 939H HALLS LAKE WA
2022-05-20 425-548-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2022-05-13 425-380-0XXX 0000–0999Assigned TELNYX LLC 073H KIRKLAND WA
2022-05-13 425-400-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E AMES LAKE WA
2022-05-13 425-541-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H EVERETT WA
2022-05-13 425-541-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H EVERETT WA
2022-05-13 425-541-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H EVERETT WA
2022-05-13 425-548-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2022-05-13 425-569-2XXX 2000–2999Assigned TELNYX LLC 073H MAPLE VLY WA
2022-04-25 425-437-7XXX 7000–7999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F MAPLE VLY WA
2022-04-15 425-541-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H EVERETT WA
2022-04-15 425-541-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H EVERETT WA
2022-04-12 425-380-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2022-04-11 425-548-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2022-03-08 425-548-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2022-03-08 425-548-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2022-03-08 425-548-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2022-03-08 425-548-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2022-03-08 425-548-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2022-03-01 425-543-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-02-28 425-542-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-02-28 425-542-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-02-28 425-542-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-02-28 425-542-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-02-28 425-542-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-02-28 425-542-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-02-28 425-542-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-02-28 425-542-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-02-28 425-542-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-02-25 425-545-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2022-02-25 425-545-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2022-02-25 425-545-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2022-02-25 425-545-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2022-02-18 425-946-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J CARNATION WA
2022-02-09 425-758-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2022-02-09 425-758-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 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.