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 206
QWEST CORPORATION 82
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
2020-07-07 206-597-0XXX 0000–0999Assigned QWEST CORPORATION 9638 SEATTLE WA
2020-07-07 206-597-1XXX 1000–1999Assigned QWEST CORPORATION 9638 SEATTLE WA
2020-07-07 206-597-2XXX 2000–2999Assigned QWEST CORPORATION 9638 SEATTLE WA
2020-07-07 206-597-5XXX 5000–5999Assigned QWEST CORPORATION 9638 SEATTLE WA
2020-07-07 206-597-7XXX 7000–7999Assigned QWEST CORPORATION 9638 SEATTLE WA
2020-07-07 206-597-8XXX 8000–8999Assigned QWEST CORPORATION 9638 SEATTLE WA
2020-07-07 206-597-9XXX 9000–9999Assigned QWEST CORPORATION 9638 SEATTLE WA
2018-01-19 206-597-6XXX 6000–6999Assigned QWEST CORPORATION 9638 SEATTLE WA
2017-06-13 206-231-2XXX 2000–2999Assigned QWEST CORPORATION 9638 DES MOINES WA
2017-06-13 206-231-3XXX 3000–3999Assigned QWEST CORPORATION 9638 DES MOINES WA
2017-06-13 206-231-4XXX 4000–4999Assigned QWEST CORPORATION 9638 DES MOINES WA
2016-05-05 206-481-0XXX 0000–0999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-1XXX 1000–1999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-2XXX 2000–2999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-3XXX 3000–3999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-4XXX 4000–4999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-5XXX 5000–5999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-6XXX 6000–6999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-7XXX 7000–7999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-8XXX 8000–8999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-9XXX 9000–9999Assigned QWEST CORPORATION 9638 SEATTLE WA
2015-08-20 206-630-0XXX 0000–0999Assigned QWEST CORPORATION 9638 SEATTLE WA
2015-08-20 206-630-1XXX 1000–1999Assigned QWEST CORPORATION 9638 SEATTLE WA
2015-08-20 206-630-2XXX 2000–2999Assigned QWEST CORPORATION 9638 SEATTLE WA
2015-08-20 206-630-3XXX 3000–3999Assigned QWEST CORPORATION 9638 SEATTLE WA
2015-08-20 206-630-4XXX 4000–4999Assigned QWEST CORPORATION 9638 SEATTLE WA
2015-08-20 206-630-5XXX 5000–5999Assigned QWEST CORPORATION 9638 SEATTLE WA
2015-08-20 206-630-6XXX 6000–6999Assigned QWEST CORPORATION 9638 SEATTLE WA
2015-08-20 206-630-7XXX 7000–7999Assigned QWEST CORPORATION 9638 SEATTLE WA
2015-08-20 206-630-8XXX 8000–8999Assigned QWEST CORPORATION 9638 SEATTLE WA
2015-08-20 206-630-9XXX 9000–9999Assigned QWEST CORPORATION 9638 SEATTLE WA
2014-04-04 206-597-3XXX 3000–3999Assigned QWEST CORPORATION 9638 SEATTLE WA
2014-04-04 206-597-4XXX 4000–4999Assigned QWEST CORPORATION 9638 SEATTLE WA
2013-06-07 206-477-5XXX 5000–5999Assigned QWEST CORPORATION 9638 SEATTLE WA
2013-06-07 206-477-6XXX 6000–6999Assigned QWEST CORPORATION 9638 SEATTLE WA
2013-06-07 206-477-7XXX 7000–7999Assigned QWEST CORPORATION 9638 SEATTLE WA
2013-06-07 206-477-8XXX 8000–8999Assigned QWEST CORPORATION 9638 SEATTLE WA
2013-06-07 206-477-9XXX 9000–9999Assigned QWEST CORPORATION 9638 SEATTLE WA
2012-03-22 206-477-0XXX 0000–0999Assigned QWEST CORPORATION 9638 SEATTLE WA
2012-03-22 206-477-1XXX 1000–1999Assigned QWEST CORPORATION 9638 SEATTLE WA
2012-03-22 206-477-2XXX 2000–2999Assigned QWEST CORPORATION 9638 SEATTLE WA
2012-03-22 206-477-3XXX 3000–3999Assigned QWEST CORPORATION 9638 SEATTLE WA
2012-03-22 206-477-4XXX 4000–4999Assigned QWEST CORPORATION 9638 SEATTLE WA
2012-02-29 206-592-5XXX 5000–5999Assigned QWEST CORPORATION 9638 DES MOINES WA
2011-11-11 206-592-3XXX 3000–3999Assigned QWEST CORPORATION 9638 DES MOINES WA
2011-11-11 206-592-4XXX 4000–4999Assigned QWEST CORPORATION 9638 DES MOINES WA
2011-08-11 206-934-5XXX 5000–5999Assigned QWEST CORPORATION 9638 SEATTLE WA
2011-08-11 206-934-6XXX 6000–6999Assigned QWEST CORPORATION 9638 SEATTLE WA
2011-08-04 206-934-2XXX 2000–2999Assigned QWEST CORPORATION 9638 SEATTLE WA
2011-08-04 206-934-3XXX 3000–3999Assigned QWEST CORPORATION 9638 SEATTLE 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.