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
2016-03-08 425-523-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F RENTON WA
2016-03-08 425-523-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F RENTON WA
2016-03-08 425-523-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F RENTON WA
2016-03-08 425-523-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F RENTON WA
2016-03-08 425-553-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2016-03-08 425-553-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2016-03-08 425-553-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2016-03-08 425-553-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2016-03-08 425-626-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F EVERETT WA
2016-03-08 425-626-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F EVERETT WA
2016-03-08 425-657-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F ISSAQUAH WA
2016-02-29 425-365-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-02-29 425-499-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-02-22 425-599-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2016-02-19 425-426-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E EVERETT WA
2016-02-17 425-365-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2016-02-16 425-906-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E MAPLE VLY WA
2016-02-10 425-657-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E ISSAQUAH WA
2016-02-10 425-657-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E ISSAQUAH WA
2016-02-09 425-553-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2016-02-03 425-357-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2016-02-03 425-399-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2016-02-01 425-363-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E NORTH BEND WA
2016-02-01 425-434-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E SNOQUMPASS WA
2016-02-01 425-979-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2016-01-28 425-222-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E FALL CITY WA
2016-01-28 425-395-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E ISSAQUAH WA
2016-01-28 425-426-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E EVERETT WA
2016-01-28 425-549-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E CARNATION WA
2016-01-28 425-599-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E HALLS LAKE WA
2016-01-28 425-689-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E AMES LAKE WA
2016-01-21 425-979-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F KIRKLAND WA
2016-01-20 425-399-4XXX 4000–4999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2016-01-20 425-426-1XXX 1000–1999Assigned WIDE VOICE, LLC - WA 707G EVERETT WA
2016-01-20 425-626-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2016-01-20 425-626-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2016-01-15 425-626-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2016-01-14 425-332-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SILVERLAKE WA
2016-01-14 425-365-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2016-01-14 425-526-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F ISSAQUAH WA
2016-01-14 425-526-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F ISSAQUAH WA
2016-01-14 425-528-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F RENTON WA
2016-01-14 425-528-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F RENTON WA
2016-01-14 425-578-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F MAPLE VLY WA
2016-01-14 425-578-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F MAPLE VLY WA
2016-01-14 425-677-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2016-01-07 425-365-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-01-07 425-365-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2015-12-30 425-496-3XXX 3000–3999Assigned METROPCS, INC. 5562 RENTON WA
2015-12-16 425-599-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 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.