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
2005-02-16 425-587-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2005-02-16 425-645-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E EVERETT WA
2005-02-15 425-533-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA
2005-02-10 425-341-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SILVERLAKE WA
2005-02-10 425-648-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2005-02-10 425-660-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F MAPLE VLY WA
2005-02-09 425-577-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2005-02-09 425-577-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BELLEVUE WA
2005-02-09 425-669-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SILVERLAKE WA
2005-02-02 425-358-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 MAPLE VLY WA
2005-01-19 425-256-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2005-01-19 425-256-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2005-01-07 425-233-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2005-01-04 425-336-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 RENTON WA
2005-01-03 425-205-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2005-01-03 425-283-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BELLEVUE WA
2004-12-29 425-329-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 HALLS LAKE WA
2004-12-29 425-654-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ISSAQUAH WA
2004-12-20 425-296-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2004-12-20 425-296-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2004-12-20 425-354-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BOTHELL WA
2004-12-20 425-354-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BOTHELL WA
2004-12-20 425-374-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EVERETT WA
2004-12-20 425-374-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EVERETT WA
2004-12-14 425-275-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2004-12-13 425-233-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2004-11-18 425-212-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2004-11-17 425-318-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2004-11-15 425-214-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2004-11-15 425-214-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2004-11-15 425-214-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2004-11-15 425-233-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2004-11-15 425-233-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2004-11-15 425-233-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2004-11-12 425-293-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2004-11-12 425-293-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2004-11-11 425-223-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2004-11-11 425-223-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2004-11-11 425-223-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2004-11-11 425-233-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2004-10-29 425-270-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 ISSAQUAH WA
2004-10-27 425-208-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2004-10-26 425-284-3XXX 3000–3999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KIRKLAND WA
2004-10-19 425-224-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SILVERLAKE WA
2004-10-14 425-208-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2004-10-08 425-213-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2004-10-08 425-223-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2004-10-08 425-223-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2004-10-08 425-223-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2004-10-06 425-530-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT 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.