NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 515
QWEST CORPORATION 115
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
2016-12-16 515-300-9XXX 9000–9999Assigned QWEST CORPORATION 9631 DES MOINES IA
2016-09-06 515-300-2XXX 2000–2999Assigned QWEST CORPORATION 9631 DES MOINES IA
2016-09-06 515-300-3XXX 3000–3999Assigned QWEST CORPORATION 9631 DES MOINES IA
2015-07-01 515-878-0XXX 0000–0999Assigned QWEST CORPORATION 9631 DES MOINES IA
2015-07-01 515-878-1XXX 1000–1999Assigned QWEST CORPORATION 9631 DES MOINES IA
2015-07-01 515-878-2XXX 2000–2999Assigned QWEST CORPORATION 9631 DES MOINES IA
2015-07-01 515-878-3XXX 3000–3999Assigned QWEST CORPORATION 9631 DES MOINES IA
2015-07-01 515-878-4XXX 4000–4999Assigned QWEST CORPORATION 9631 DES MOINES IA
2015-07-01 515-878-5XXX 5000–5999Assigned QWEST CORPORATION 9631 DES MOINES IA
2015-07-01 515-878-6XXX 6000–6999Assigned QWEST CORPORATION 9631 DES MOINES IA
2015-07-01 515-878-7XXX 7000–7999Assigned QWEST CORPORATION 9631 DES MOINES IA
2015-07-01 515-878-8XXX 8000–8999Assigned QWEST CORPORATION 9631 DES MOINES IA
2015-07-01 515-878-9XXX 9000–9999Assigned QWEST CORPORATION 9631 DES MOINES IA
2014-12-03 515-735-7XXX 7000–7999Assigned QWEST CORPORATION 9631 AMES IA
2014-08-29 515-518-3XXX 3000–3999Assigned QWEST CORPORATION 9631 DES MOINES IA
2014-05-28 515-219-6XXX 6000–6999Assigned QWEST CORPORATION 9631 ADEL IA
2014-05-28 515-420-7XXX 7000–7999Assigned QWEST CORPORATION 9631 POLK CITY IA
2013-07-31 515-986-8XXX 8000–8999Assigned QWEST CORPORATION 9631 DES MOINES IA
2013-03-21 515-986-6XXX 6000–6999Assigned QWEST CORPORATION 9631 DES MOINES IA
2013-01-23 515-631-3XXX 3000–3999Assigned QWEST CORPORATION 9631 DES MOINES IA
2013-01-23 515-631-7XXX 7000–7999Assigned QWEST CORPORATION 9631 DES MOINES IA
2012-11-29 515-518-2XXX 2000–2999Assigned QWEST CORPORATION 9631 DES MOINES IA
2012-08-06 515-446-6XXX 6000–6999Assigned QWEST CORPORATION 9631 DES MOINES IA
2011-06-06 515-216-2XXX 2000–2999Assigned QWEST CORPORATION 9631 DES MOINES IA
2010-05-07 515-535-0XXX 0000–0999Assigned QWEST CORPORATION 9631 DES MOINES IA
2010-05-07 515-535-1XXX 1000–1999Assigned QWEST CORPORATION 9631 DES MOINES IA
2010-05-07 515-535-2XXX 2000–2999Assigned QWEST CORPORATION 9631 DES MOINES IA
2010-05-07 515-535-3XXX 3000–3999Assigned QWEST CORPORATION 9631 DES MOINES IA
2010-05-07 515-535-4XXX 4000–4999Assigned QWEST CORPORATION 9631 DES MOINES IA
2010-05-07 515-535-5XXX 5000–5999Assigned QWEST CORPORATION 9631 DES MOINES IA
2010-05-07 515-535-6XXX 6000–6999Assigned QWEST CORPORATION 9631 DES MOINES IA
2010-05-07 515-535-7XXX 7000–7999Assigned QWEST CORPORATION 9631 DES MOINES IA
2010-05-07 515-535-8XXX 8000–8999Assigned QWEST CORPORATION 9631 DES MOINES IA
2010-05-07 515-535-9XXX 9000–9999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-31 515-376-0XXX 0000–0999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-31 515-376-1XXX 1000–1999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-31 515-376-2XXX 2000–2999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-31 515-376-3XXX 3000–3999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-31 515-376-4XXX 4000–4999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-31 515-376-5XXX 5000–5999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-31 515-376-6XXX 6000–6999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-31 515-376-7XXX 7000–7999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-31 515-376-8XXX 8000–8999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-31 515-376-9XXX 9000–9999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-01 515-342-0XXX 0000–0999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-01 515-342-1XXX 1000–1999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-01 515-342-2XXX 2000–2999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-01 515-342-3XXX 3000–3999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-01 515-342-4XXX 4000–4999Assigned QWEST CORPORATION 9631 DES MOINES IA
2009-12-01 515-342-5XXX 5000–5999Assigned QWEST CORPORATION 9631 DES MOINES IA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.