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 321
LEVEL 3 COMMUNICATIONS, LLC - FL 151
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
2024-08-01 321-491-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MELBOURNE FL
2024-06-03 321-850-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MELBOURNE FL
2020-02-25 321-340-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ORLANDO FL
2019-08-29 321-326-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MELBOURNE FL
2019-02-21 321-517-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 KENANSVL FL
2019-01-30 321-294-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MELBOURNE FL
2018-05-01 321-395-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 LKBUNAVIST FL
2017-11-21 321-272-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MELBOURNE FL
2017-08-22 321-361-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MELBOURNE FL
2017-06-26 321-273-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MONTVERDE FL
2015-07-30 321-257-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 SANFORD FL
2015-07-23 321-408-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 COCOA FL
2015-07-09 321-275-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 SANFORD FL
2014-11-19 321-559-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 CELEBRATN FL
2014-10-28 321-221-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WINTERGRDN FL
2014-09-25 321-222-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TITUSVILLE FL
2014-07-25 321-316-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WINTERPARK FL
2014-06-18 321-877-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 COCOA FL
2014-06-04 321-312-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MELBOURNE FL
2014-05-29 321-428-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 EAU GALLIE FL
2014-04-10 321-316-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WINTERPARK FL
2013-11-27 321-802-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 MELBOURNE FL
2013-06-07 321-732-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ORLANDO FL
2013-06-04 321-203-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WINTERPARK FL
2013-05-29 321-337-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 KISSIMMEE FL
2013-05-29 321-338-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 COCOA FL
2013-05-29 321-732-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ORLANDO FL
2013-05-29 321-732-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ORLANDO FL
2013-03-27 321-221-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WINTERGRDN FL
2013-03-13 321-336-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 COCOABEACH FL
2012-11-28 321-325-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 GENEVA FL
2012-11-15 321-207-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WINTERPARK FL
2012-10-24 321-250-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 KISSIMMEE FL
2012-07-12 321-214-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WINTERPARK FL
2012-06-18 321-559-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 CELEBRATN FL
2012-03-20 321-248-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 APOPKA FL
2012-01-18 321-926-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 SANFORD FL
2011-09-07 321-926-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 SANFORD FL
2011-09-02 321-256-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 APOPKA FL
2011-07-21 321-775-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 EAU GALLIE FL
2011-05-03 321-207-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WINTERPARK FL
2011-01-11 321-304-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WINTERPARK FL
2010-12-02 321-422-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WINTERPARK FL
2010-11-30 321-418-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ORLANDO FL
2010-11-30 321-418-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ORLANDO FL
2010-11-30 321-418-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ORLANDO FL
2010-11-29 321-800-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ORLANDO FL
2010-11-29 321-800-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ORLANDO FL
2010-11-29 321-800-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ORLANDO FL
2010-11-29 321-800-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 ORLANDO FL

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.