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
2006-01-05 253-503-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-01-05 253-617-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-01-03 253-275-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2006-01-03 253-486-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-12-27 253-249-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-12-21 253-534-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-12-15 253-571-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-12-15 253-571-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-12-13 253-439-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-12-13 253-465-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E ROY WA
2005-12-13 253-495-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-12-13 253-495-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-12-13 253-655-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E GRAHAM WA
2005-12-13 253-682-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-12-06 253-414-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-12-06 253-439-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-12-06 253-459-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-12-06 253-486-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2005-12-06 253-486-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2005-12-06 253-508-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-12-06 253-683-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-12-06 253-683-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-12-05 253-590-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-12-05 253-590-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-12-05 253-590-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-12-05 253-617-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-11-23 253-321-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 SUMNER WA
2005-11-21 253-579-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-11-11 253-210-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 GRAHAM WA
2005-11-02 253-269-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-11-02 253-682-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-10-24 253-508-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2005-10-20 253-439-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-10-19 253-214-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 DES MOINES WA
2005-10-19 253-441-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-10-19 253-579-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-10-19 253-579-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-10-19 253-579-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-10-19 253-682-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-10-18 253-447-3XXX 3000–3999Assigned QWEST CORPORATION 9638 SUMNER WA
2005-10-18 253-778-7XXX 7000–7999Assigned QWEST CORPORATION 9638 TACOMAWVLY WA
2005-10-14 253-441-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-10-14 253-441-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-10-14 253-441-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-10-14 253-441-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-10-07 253-579-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-10-07 253-579-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-10-05 253-267-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2005-10-05 253-267-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2005-10-05 253-534-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA 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.