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
2009-01-05 425-341-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SILVERLAKE WA
2009-01-05 425-390-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F RENTON WA
2009-01-05 425-395-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F ISSAQUAH WA
2009-01-05 425-405-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F EVERETT WA
2009-01-05 425-405-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F EVERETT WA
2009-01-05 425-522-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2009-01-05 425-522-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2009-01-05 425-679-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BELLEVUE WA
2009-01-05 425-686-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BOTHELL WA
2009-01-05 425-686-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BOTHELL WA
2009-01-05 425-835-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F HALLS LAKE WA
2009-01-05 425-835-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F HALLS LAKE WA
2008-12-30 425-657-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J ISSAQUAH WA
2008-12-30 425-789-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2008-12-30 425-835-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2008-12-30 425-961-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J ISSAQUAH WA
2008-12-19 425-587-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2008-12-19 425-587-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2008-12-02 425-449-7XXX 7000–7999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2008-11-21 425-213-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BELLEVUE WA
2008-11-19 425-516-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELLEVUE WA
2008-11-10 425-903-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2008-10-29 425-877-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2008-10-24 425-408-8XXX 8000–8999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BOTHELL WA
2008-10-24 425-449-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELLEVUE WA
2008-10-24 425-449-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELLEVUE WA
2008-10-24 425-898-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KIRKLAND WA
2008-10-22 425-412-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2008-10-20 425-449-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2008-10-20 425-629-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2008-10-09 425-988-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2008-10-06 425-368-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOTHELL WA
2008-10-06 425-420-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOTHELL WA
2008-09-17 425-903-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2008-09-08 425-968-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 KIRKLAND WA
2008-08-20 425-457-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2008-08-20 425-495-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2008-08-14 425-298-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2008-08-14 425-298-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2008-08-13 425-202-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KIRKLAND WA
2008-08-13 425-320-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F EVERETT WA
2008-08-08 425-434-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E SNOQUMPASS WA
2008-08-08 425-549-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E CARNATION WA
2008-08-08 425-880-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E AMES LAKE WA
2008-08-01 425-298-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J KIRKLAND WA
2008-07-29 425-202-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2008-07-29 425-285-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2008-07-28 425-284-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2008-07-22 425-563-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2008-07-16 425-242-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND 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.