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 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
2022-01-27 425-340-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2022-01-27 425-340-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2022-01-27 425-340-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2022-01-27 425-542-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-01-26 425-370-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-01-26 425-370-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-01-26 425-370-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-01-26 425-370-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-01-26 425-758-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2022-01-26 425-758-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2022-01-26 425-998-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-01-25 425-370-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE WA
2022-01-25 425-370-2XXX 2000–2999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE WA
2022-01-25 425-370-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE WA
2022-01-25 425-370-4XXX 4000–4999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE WA
2022-01-21 425-541-0XXX 0000–0999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F EVERETT WA
2022-01-21 425-541-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F EVERETT WA
2022-01-14 425-667-6XXX 6000–6999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BOTHELL WA
2022-01-13 425-667-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2022-01-13 425-667-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2022-01-11 425-539-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2022-01-11 425-539-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2022-01-11 425-539-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2022-01-11 425-539-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2022-01-11 425-539-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2022-01-11 425-539-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2022-01-10 425-832-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J ISSAQUAH WA
2022-01-07 425-842-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J NORTH BEND WA
2022-01-05 425-683-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J EVERETT WA
2022-01-04 425-569-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J MAPLE VLY WA
2021-12-14 425-545-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2021-12-13 425-667-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2021-12-10 425-738-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2021-12-02 425-534-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E HALLS LAKE WA
2021-12-02 425-534-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E HALLS LAKE WA
2021-12-02 425-758-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E HALLS LAKE WA
2021-12-02 425-946-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E CARNATION WA
2021-11-30 425-539-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H EVERETT WA
2021-11-23 425-400-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E AMES LAKE WA
2021-11-23 425-400-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E AMES LAKE WA
2021-11-18 425-534-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2021-11-18 425-534-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2021-11-05 425-667-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2021-11-05 425-667-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2021-11-05 425-667-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2021-11-05 425-667-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2021-11-02 425-340-7XXX 7000–7999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F ISSAQUAH WA
2021-11-02 425-506-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2021-11-02 425-506-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2021-11-02 425-506-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND 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.