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
2013-01-11 425-791-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2013-01-11 425-948-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SILVERLAKE WA
2012-12-31 425-435-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2012-12-31 425-947-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2012-12-20 425-295-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2012-12-20 425-295-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J ISSAQUAH WA
2012-12-20 425-658-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2012-12-19 425-324-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BELLEVUE WA
2012-12-14 425-245-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2012-12-14 425-264-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2012-12-13 425-892-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2012-12-12 425-492-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2012-12-11 425-563-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2012-12-03 425-273-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2012-11-07 425-420-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2012-11-07 425-896-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2012-11-06 425-405-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2012-10-18 425-435-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2012-10-18 425-435-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2012-10-11 425-563-1XXX 1000–1999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 HALLS LAKE WA
2012-10-08 425-628-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2012-10-03 425-919-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2012-10-01 425-628-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2012-09-27 425-249-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2012-09-27 425-249-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2012-09-26 425-898-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 KIRKLAND WA
2012-09-26 425-951-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2012-09-20 425-249-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2012-09-20 425-551-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2012-09-10 425-406-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2012-09-06 425-286-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2012-09-06 425-628-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2012-09-04 425-610-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2012-08-29 425-777-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2012-08-29 425-777-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2012-08-27 425-622-9XXX 9000–9999Assigned ASTOUND BROADBAND, LLC - WA 937F EVERETT WA
2012-08-14 425-967-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2012-08-10 425-471-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2012-08-09 425-429-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2012-08-09 425-777-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2012-08-03 425-429-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2012-08-03 425-496-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2012-07-30 425-777-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2012-07-19 425-429-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2012-07-17 425-492-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 BOTHELL WA
2012-07-05 425-789-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2012-07-05 425-789-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2012-07-03 425-777-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELLEVUE WA
2012-07-02 425-777-8XXX 8000–8999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2012-06-12 425-407-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EVERETT 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.