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
2005-10-10 425-297-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EVERETT WA
2005-10-10 425-297-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EVERETT WA
2005-10-07 425-368-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2005-10-03 425-214-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA
2005-10-03 425-214-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA
2005-10-03 425-233-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA
2005-10-03 425-248-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2005-10-03 425-248-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2005-10-03 425-679-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2005-09-26 425-315-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2005-09-26 425-315-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2005-09-26 425-577-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2005-09-26 425-577-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2005-09-26 425-577-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2005-09-20 425-802-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2005-09-15 425-433-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MAPLE VLY WA
2005-09-15 425-433-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MAPLE VLY WA
2005-09-15 425-433-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MAPLE VLY WA
2005-09-06 425-223-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2005-09-06 425-463-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2005-09-06 425-463-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2005-09-06 425-533-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2005-09-02 425-310-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MAPLE VLY WA
2005-09-02 425-310-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MAPLE VLY WA
2005-09-02 425-310-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MAPLE VLY WA
2005-08-31 425-383-0XXX 0000–0999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2005-08-31 425-383-1XXX 1000–1999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2005-08-31 425-383-2XXX 2000–2999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2005-08-31 425-383-3XXX 3000–3999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2005-08-31 425-383-4XXX 4000–4999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2005-08-31 425-383-5XXX 5000–5999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2005-08-31 425-383-6XXX 6000–6999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2005-08-31 425-383-7XXX 7000–7999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2005-08-31 425-383-8XXX 8000–8999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2005-08-31 425-383-9XXX 9000–9999Assigned QWEST CORPORATION 9638 BELLEVUE WA
2005-08-16 425-320-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EVERETT WA
2005-08-16 425-320-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EVERETT WA
2005-08-16 425-320-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EVERETT WA
2005-08-11 425-286-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2005-08-11 425-314-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2005-08-11 425-314-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2005-08-11 425-314-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2005-08-04 425-296-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2005-08-04 425-296-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2005-08-04 425-296-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2005-08-04 425-296-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2005-07-22 425-753-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2005-07-22 425-753-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2005-07-22 425-753-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2005-07-11 425-293-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 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.