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 253
EXIANT COMMUNICATIONS 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
2025-05-08 253-421-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-05-08 253-421-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-05-08 253-421-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-05-08 253-421-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-04-11 253-421-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2025-04-11 253-421-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2025-04-11 253-421-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2025-04-07 253-412-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2025-04-07 253-412-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2025-04-07 253-412-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2025-03-28 253-954-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2025-03-28 253-954-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2025-03-07 253-362-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUMNER WA
2025-03-07 253-420-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-03-07 253-420-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-03-07 253-420-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-03-07 253-420-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-03-07 253-420-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-03-07 253-420-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-03-07 253-420-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-03-07 253-421-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-03-07 253-421-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-03-07 253-421-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2025-02-25 253-412-7XXX 7000–7999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F TACOMA WA
2025-02-25 253-419-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F KENT WA
2025-02-10 253-418-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2025-02-10 253-418-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2025-02-05 253-412-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 TACOMA WA
2025-01-14 253-210-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GRAHAM WA
2025-01-14 253-346-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2025-01-14 253-406-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GRAHAM WA
2025-01-14 253-406-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GRAHAM WA
2025-01-14 253-410-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2025-01-14 253-417-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2025-01-14 253-590-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2025-01-14 253-590-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2024-12-26 253-400-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F GIG HARBOR WA
2024-12-16 253-297-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMAWVLY WA
2024-12-03 253-458-5XXX 5000–5999Assigned TERRA NOVA TELECOM INC. 145J KENT WA
2024-12-02 253-418-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F PUYALLUP WA
2024-11-26 253-362-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F SUMNER WA
2024-11-26 253-406-4XXX 4000–4999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F GRAHAM WA
2024-11-26 253-420-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2024-11-26 253-420-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2024-11-26 253-420-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2024-11-08 253-417-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2024-11-01 253-264-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUMNER WA
2024-11-01 253-401-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2024-11-01 253-401-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2024-10-23 253-417-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F AUBURN 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.