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 813
LEVEL 3 TELECOM OF FLORIDA, LP - FL 58
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
2019-05-22 813-565-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPAEST FL
2016-08-12 813-853-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2014-06-20 813-452-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2014-06-20 813-452-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-11-08 813-518-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-11-08 813-518-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-06-28 813-517-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-06-13 813-456-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-06-13 813-456-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-06-13 813-456-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-06-13 813-456-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-06-13 813-456-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-06-13 813-456-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-06-13 813-456-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-06-13 813-456-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-06-13 813-456-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2013-06-13 813-456-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2011-07-20 813-529-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2011-07-20 813-529-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2011-07-20 813-529-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2011-07-20 813-529-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2011-07-20 813-529-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2011-07-20 813-529-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2011-07-20 813-529-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2011-07-20 813-529-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2011-07-20 813-529-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2011-07-20 813-529-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2008-07-14 813-384-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2008-07-14 813-384-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2008-07-14 813-384-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2007-10-09 813-449-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2007-10-09 813-449-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2007-10-09 813-449-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2007-10-09 813-449-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2007-10-09 813-449-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2007-10-09 813-449-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2006-05-15 813-435-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPANTH FL
2006-05-15 813-489-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPASTH FL
2006-05-15 813-523-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPA FL
2006-05-15 813-571-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPAEST FL
2006-05-15 813-925-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPAWST FL
2006-05-12 813-826-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2006-05-12 813-826-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2006-05-12 813-826-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2006-05-12 813-826-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2006-05-12 813-826-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2006-05-12 813-826-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2006-05-12 813-826-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2006-05-12 813-826-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL
2006-05-12 813-826-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 TAMPACEN FL

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.