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
2025-12-19 425-581-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SILVERLAKE WA
2025-12-19 425-995-5XXX 5000–5999Assigned TERRA NOVA TELECOM INC. 145J EVERETT WA
2025-12-09 425-567-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2025-12-05 425-575-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-12-05 425-575-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-12-05 425-575-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-12-05 425-575-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-11-28 425-571-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2025-11-12 425-567-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2025-10-23 425-574-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-10-23 425-574-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-10-23 425-574-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-10-23 425-574-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-10-23 425-574-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-10-23 425-574-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-10-23 425-575-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-10-23 425-575-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-10-14 425-995-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J EVERETT WA
2025-10-10 425-567-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2025-10-03 425-574-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2025-10-03 425-574-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2025-09-26 425-571-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2025-09-26 425-571-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2025-09-25 425-325-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2025-09-19 425-568-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-09-19 425-568-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-09-19 425-568-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-09-19 425-568-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-09-19 425-574-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-09-19 425-574-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-09-15 425-566-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2025-09-15 425-566-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2025-08-29 425-573-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2025-08-29 425-573-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2025-08-29 425-573-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2025-08-29 425-573-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2025-08-29 425-573-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2025-08-29 425-573-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2025-08-29 425-573-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2025-08-29 425-573-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2025-08-29 425-573-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2025-08-29 425-573-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 EVERETT WA
2025-08-15 425-566-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2025-08-15 425-567-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2025-08-15 425-567-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2025-08-05 425-949-1XXX 1000–1999Assigned TERRA NOVA TELECOM INC. 145J BOTHELL WA
2025-07-25 425-568-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2025-07-17 425-565-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2025-07-14 425-568-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2025-07-14 425-568-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE 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.