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
2017-07-27 425-970-2XXX 2000–2999Assigned METROPCS, INC. 5562 RENTON WA
2017-07-17 425-362-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-07-17 425-362-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-07-17 425-362-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-07-14 425-272-9XXX 9000–9999Assigned TELNYX LLC 073H RENTON WA
2017-07-13 425-310-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F MAPLE VLY WA
2017-07-13 425-375-7XXX 7000–7999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BOTHELL WA
2017-07-13 425-961-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F ISSAQUAH WA
2017-06-20 425-588-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 KIRKLAND WA
2017-06-14 425-659-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOTHELL WA
2017-06-05 425-952-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F KIRKLAND WA
2017-05-16 425-588-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KIRKLAND WA
2017-05-09 425-659-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2017-05-01 425-525-7XXX 7000–7999Assigned ASTOUND BROADBAND, LLC - WA 937F RENTON WA
2017-04-26 425-616-4XXX 4000–4999Assigned ASTOUND BROADBAND, LLC - WA 937F HALLS LAKE WA
2017-04-11 425-616-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2017-03-30 425-588-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2017-03-30 425-588-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2017-03-22 425-569-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MAPLE VLY WA
2017-03-22 425-585-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SILVERLAKE WA
2017-03-21 425-948-0XXX 0000–0999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2017-03-08 425-589-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-03-08 425-589-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-03-08 425-589-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-03-08 425-589-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-03-08 425-589-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-02-23 425-800-0XXX 0000–0999Assigned TELNYX LLC 073H BELLEVUE WA
2017-02-23 425-800-8XXX 8000–8999Assigned TELNYX LLC 073H BELLEVUE WA
2017-02-08 425-677-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2017-02-01 425-332-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SILVERLAKE WA
2017-01-17 425-837-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2017-01-11 425-616-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2016-12-19 425-589-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BELLEVUE WA
2016-12-15 425-295-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2016-12-15 425-399-6XXX 6000–6999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2016-11-30 425-382-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2016-11-30 425-524-9XXX 9000–9999Assigned METROPCS, INC. 5562 RENTON WA
2016-11-28 425-659-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2016-11-22 425-448-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2016-11-14 425-589-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-11-14 425-589-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-11-14 425-589-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-11-09 425-362-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-11-01 425-616-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2016-11-01 425-728-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2016-10-28 425-654-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2016-10-26 425-362-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELLEVUE WA
2016-10-17 425-588-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2016-10-17 425-588-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2016-10-17 425-588-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND 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.