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
2005-02-17 253-426-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-02-17 253-439-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-02-17 253-882-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-02-17 253-882-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-02-17 253-882-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-02-17 253-882-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-02-17 253-882-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-02-17 253-882-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-02-16 253-216-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KENT WA
2005-02-16 253-218-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E AUBURN WA
2005-02-16 253-447-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E SUMNER WA
2005-02-16 253-528-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2005-02-09 253-426-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2005-02-03 253-655-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 GRAHAM WA
2005-01-31 253-439-1XXX 1000–1999Assigned QWEST CORPORATION 9638 TACOMA WA
2005-01-31 253-439-2XXX 2000–2999Assigned QWEST CORPORATION 9638 TACOMA WA
2005-01-31 253-439-3XXX 3000–3999Assigned QWEST CORPORATION 9638 TACOMA WA
2005-01-31 253-439-4XXX 4000–4999Assigned QWEST CORPORATION 9638 TACOMA WA
2005-01-31 253-439-5XXX 5000–5999Assigned QWEST CORPORATION 9638 TACOMA WA
2005-01-31 253-617-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2005-01-28 253-299-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SUMNER WA
2005-01-28 253-655-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 GRAHAM WA
2005-01-25 253-218-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2005-01-21 253-514-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2005-01-20 253-414-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-01-20 253-414-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-01-17 253-205-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-01-14 253-200-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PUYALLUP WA
2005-01-14 253-336-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 DES MOINES WA
2005-01-14 253-336-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 DES MOINES WA
2005-01-12 253-722-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-01-12 253-722-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-01-12 253-722-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-01-12 253-722-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-01-12 253-722-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-01-12 253-722-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-01-06 253-248-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMAWVLY WA
2005-01-04 253-200-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PUYALLUP WA
2004-12-29 253-656-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KENT WA
2004-12-20 253-205-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 AUBURN WA
2004-12-14 253-508-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2004-12-13 253-205-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2004-12-13 253-205-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2004-12-09 253-359-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-12-09 253-359-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-12-09 253-359-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-12-08 253-266-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2004-12-08 253-426-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2004-12-07 253-218-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 AUBURN WA
2004-12-07 253-218-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 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.