NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 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, last 30 days — NPA 561
BANDWIDTH.COM CLEC, LLC - FL 1
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
2005-03-23 561-520-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOCA RATON FL
2005-03-23 561-520-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOCA RATON FL
2005-03-23 561-520-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOCA RATON FL
2005-03-23 561-520-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOCA RATON FL
2005-03-23 561-520-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOCA RATON FL
2005-03-23 561-521-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOYNTONBCH FL
2005-03-23 561-521-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOYNTONBCH FL
2005-03-23 561-521-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOYNTONBCH FL
2005-03-23 561-521-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOYNTONBCH FL
2005-03-23 561-521-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOYNTONBCH FL
2005-03-23 561-521-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOYNTONBCH FL
2005-03-23 561-521-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOYNTONBCH FL
2005-03-23 561-521-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOYNTONBCH FL
2005-03-23 561-521-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOYNTONBCH FL
2005-03-23 561-521-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 BOYNTONBCH FL
2005-03-23 561-522-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 DELRAY BCH FL
2005-03-23 561-522-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 DELRAY BCH FL
2005-03-23 561-522-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 DELRAY BCH FL
2005-03-23 561-522-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 DELRAY BCH FL
2005-03-23 561-522-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 DELRAY BCH FL
2005-03-23 561-522-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 DELRAY BCH FL
2005-03-23 561-522-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 DELRAY BCH FL
2005-03-23 561-522-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 DELRAY BCH FL
2005-03-23 561-522-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 DELRAY BCH FL
2005-03-23 561-522-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 DELRAY BCH FL
2005-03-21 561-327-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 BOYNTONBCH FL
2005-03-21 561-327-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 BOYNTONBCH FL
2005-03-21 561-327-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 BOYNTONBCH FL
2005-03-17 561-400-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BOCA RATON FL
2005-03-17 561-459-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2005-03-17 561-459-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WPALMBEACH FL
2005-03-16 561-584-0XXX 0000–0999Assigned METROPCS, INC. 5562 WPALMBEACH FL
2005-03-16 561-584-1XXX 1000–1999Assigned METROPCS, INC. 5562 WPALMBEACH FL
2005-03-16 561-584-2XXX 2000–2999Assigned METROPCS, INC. 5562 WPALMBEACH FL
2005-03-16 561-584-3XXX 3000–3999Assigned METROPCS, INC. 5562 WPALMBEACH FL
2005-03-16 561-584-4XXX 4000–4999Assigned METROPCS, INC. 5562 WPALMBEACH FL
2005-03-16 561-847-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WPALMBEACH FL
2005-03-10 561-337-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WPALMBEACH FL
2005-03-09 561-537-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
2005-02-22 561-459-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WPALMBEACH FL
2005-02-18 561-459-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WPALMBEACH FL
2005-02-18 561-459-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WPALMBEACH FL
2005-02-18 561-459-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WPALMBEACH FL
2005-02-18 561-459-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WPALMBEACH FL
2005-02-18 561-459-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 WPALMBEACH FL
2005-02-18 561-935-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 JUPITER FL
2005-02-18 561-935-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 JUPITER FL
2005-02-18 561-935-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - FL 4802 JUPITER FL
2005-02-16 561-337-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
2005-02-15 561-572-1XXX 1000–1999Assigned METROPCS, INC. 5562 BOYNTONBCH 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.