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
2015-05-11 425-406-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2015-05-07 425-305-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2015-05-07 425-309-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E EVERETT WA
2015-05-07 425-678-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E HALLS LAKE WA
2015-05-07 425-961-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E ISSAQUAH WA
2015-04-21 425-595-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2015-04-16 425-651-0XXX 0000–0999Assigned QWEST CORPORATION 9638 ISSAQUAH WA
2015-04-16 425-651-1XXX 1000–1999Assigned QWEST CORPORATION 9638 ISSAQUAH WA
2015-04-09 425-200-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2015-04-09 425-287-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2015-04-09 425-287-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2015-04-08 425-595-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2015-04-08 425-595-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2015-03-18 425-363-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NORTH BEND WA
2015-03-06 425-236-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2015-03-06 425-287-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2015-02-13 425-689-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E AMES LAKE WA
2015-02-11 425-441-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E FALL CITY WA
2015-02-11 425-549-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E CARNATION WA
2015-02-10 425-559-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2015-01-30 425-305-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2015-01-30 425-305-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2015-01-09 425-363-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 NORTH BEND WA
2014-12-22 425-305-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 KIRKLAND WA
2014-12-12 425-902-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2014-12-12 425-902-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2014-12-12 425-902-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2014-12-03 425-559-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE WA
2014-11-25 425-563-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 HALLS LAKE WA
2014-11-14 425-409-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2014-11-14 425-409-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2014-11-11 425-236-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2014-10-29 425-305-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2014-10-27 425-678-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F HALLS LAKE WA
2014-10-20 425-287-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2014-10-20 425-523-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F RENTON WA
2014-10-17 425-309-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2014-10-17 425-309-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2014-10-17 425-559-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2014-10-17 425-559-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2014-10-17 425-970-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2014-10-16 425-309-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2014-10-16 425-508-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2014-10-15 425-236-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2014-10-14 425-270-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2014-10-14 425-906-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MAPLE VLY WA
2014-10-09 425-282-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2014-10-09 425-282-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2014-10-09 425-282-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2014-10-09 425-282-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON 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.