NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 253
QWEST CORPORATION 43
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
2013-04-03 253-750-6XXX 6000–6999Assigned QWEST CORPORATION 9638 SUMNER WA
2013-02-06 253-545-7XXX 7000–7999Assigned QWEST CORPORATION 9638 AUBURN WA
2012-09-05 253-545-2XXX 2000–2999Assigned QWEST CORPORATION 9638 AUBURN WA
2012-09-05 253-545-3XXX 3000–3999Assigned QWEST CORPORATION 9638 AUBURN WA
2012-09-05 253-545-4XXX 4000–4999Assigned QWEST CORPORATION 9638 AUBURN WA
2012-09-05 253-545-5XXX 5000–5999Assigned QWEST CORPORATION 9638 AUBURN WA
2012-06-07 253-545-6XXX 6000–6999Assigned QWEST CORPORATION 9638 AUBURN WA
2009-01-20 253-604-3XXX 3000–3999Assigned QWEST CORPORATION 9638 PUYALLUP WA
2008-12-02 253-234-6XXX 6000–6999Assigned QWEST CORPORATION 9638 KENT WA
2007-09-17 253-477-0XXX 0000–0999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-1XXX 1000–1999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-2XXX 2000–2999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-3XXX 3000–3999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-4XXX 4000–4999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-5XXX 5000–5999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-6XXX 6000–6999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-7XXX 7000–7999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-8XXX 8000–8999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-09-17 253-477-9XXX 9000–9999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-03-06 253-301-5XXX 5000–5999Assigned QWEST CORPORATION 9638 TACOMA WA
2007-03-06 253-301-6XXX 6000–6999Assigned QWEST CORPORATION 9638 TACOMA WA
2006-08-17 253-876-6XXX 6000–6999Assigned QWEST CORPORATION 9638 AUBURN 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
2005-01-31 253-439-1XXX 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
2004-10-04 253-299-5XXX 5000–5999Assigned QWEST CORPORATION 9638 SUMNER WA
2004-06-11 253-299-6XXX 6000–6999Assigned QWEST CORPORATION 9638 SUMNER WA
2004-04-30 253-985-2XXX 2000–2999Assigned QWEST CORPORATION 9638 TACOMA WA
2004-04-30 253-985-4XXX 4000–4999Assigned QWEST CORPORATION 9638 TACOMA WA
2004-04-30 253-985-6XXX 6000–6999Assigned QWEST CORPORATION 9638 TACOMA WA
2004-04-30 253-985-8XXX 8000–8999Assigned QWEST CORPORATION 9638 TACOMA WA
2003-10-28 253-617-6XXX 6000–6999Assigned QWEST CORPORATION 9638 TACOMA WA
2003-10-20 253-447-4XXX 4000–4999Assigned QWEST CORPORATION 9638 SUMNER WA
2003-04-10 253-697-1XXX 1000–1999Assigned QWEST CORPORATION 9638 PUYALLUP WA
2003-03-25 253-697-2XXX 2000–2999Assigned QWEST CORPORATION 9638 PUYALLUP WA
2003-03-25 253-697-3XXX 3000–3999Assigned QWEST CORPORATION 9638 PUYALLUP WA
2003-03-25 253-697-4XXX 4000–4999Assigned QWEST CORPORATION 9638 PUYALLUP WA
2003-03-25 253-697-5XXX 5000–5999Assigned QWEST CORPORATION 9638 PUYALLUP WA
2003-03-25 253-697-7XXX 7000–7999Assigned QWEST CORPORATION 9638 PUYALLUP 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.