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
2006-01-24 425-315-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2006-01-24 425-328-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2006-01-24 425-328-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2006-01-23 425-281-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2006-01-15 425-280-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2006-01-11 425-263-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2006-01-11 425-263-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2006-01-11 425-263-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2006-01-11 425-263-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2006-01-11 425-263-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2006-01-11 425-647-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2006-01-11 425-647-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2006-01-11 425-647-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2006-01-11 425-647-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2006-01-11 425-647-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2006-01-04 425-502-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA
2006-01-04 425-502-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA
2005-12-28 425-225-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SILVERLAKE WA
2005-12-27 425-374-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2005-12-27 425-374-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2005-12-27 425-533-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2005-12-27 425-968-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2005-12-27 425-988-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2005-12-21 425-458-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2005-12-16 425-367-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2005-12-16 425-367-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2005-12-16 425-367-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2005-12-06 425-577-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2005-12-06 425-577-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2005-12-06 425-577-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2005-12-06 425-577-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2005-12-06 425-984-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2005-11-30 425-373-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2005-11-23 425-245-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F HALLS LAKE WA
2005-11-17 425-533-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2005-11-17 425-533-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2005-11-17 425-533-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2005-11-11 425-320-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2005-11-11 425-320-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2005-11-11 425-320-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2005-10-27 425-270-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F ISSAQUAH WA
2005-10-24 425-314-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2005-10-24 425-314-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2005-10-24 425-749-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2005-10-24 425-749-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2005-10-24 425-802-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2005-10-11 425-249-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E EVERETT WA
2005-10-10 425-216-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KIRKLAND WA
2005-10-10 425-249-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EVERETT WA
2005-10-10 425-284-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 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.