NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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, last 30 days — NPA 586
NEW CINGULAR WIRELESS PCS, LLC - IL 1
INTRADO COMMUNICATIONS, LLC 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
2011-05-17 586-265-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MT CLEMENS MI
2011-05-17 586-265-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MT CLEMENS MI
2011-05-17 586-533-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROSEVILLE MI
2011-05-17 586-533-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROSEVILLE MI
2011-05-17 586-690-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MT CLEMENS MI
2011-05-17 586-859-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROSEVILLE MI
2011-04-28 586-983-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C WARREN MI
2011-03-31 586-495-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2011-03-31 586-690-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2011-03-31 586-690-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2011-03-31 586-804-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2011-03-31 586-804-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2011-03-31 586-804-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2011-03-25 586-533-3XXX 3000–3999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L ROSEVILLE MI
2011-03-03 586-277-5XXX 5000–5999Assigned METROPCS, INC. 5562 NEW HAVEN MI
2011-03-03 586-533-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2011-03-03 586-533-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2011-03-03 586-533-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2011-03-01 586-265-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2011-03-01 586-746-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2011-02-23 586-533-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2011-02-18 586-277-2XXX 2000–2999Assigned METROPCS, INC. 5562 NEW HAVEN MI
2011-02-18 586-277-3XXX 3000–3999Assigned METROPCS, INC. 5562 NEW HAVEN MI
2011-01-28 586-244-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J NEW HAVEN MI
2011-01-26 586-265-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2011-01-26 586-265-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2011-01-26 586-277-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E NEW HAVEN MI
2011-01-26 586-894-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROMEO MI
2011-01-21 586-335-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2011-01-21 586-335-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2011-01-20 586-277-7XXX 7000–7999Assigned METROPCS, INC. 5562 NEW HAVEN MI
2011-01-19 586-248-9XXX 9000–9999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 RICHMOND MI
2010-12-23 586-894-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ROMEO MI
2010-11-16 586-690-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MT CLEMENS MI
2010-11-11 586-533-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2010-11-11 586-533-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2010-11-03 586-337-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROMEO MI
2010-11-03 586-480-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 WARREN MI
2010-11-02 586-393-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CENTERLINE MI
2010-11-02 586-799-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E UTICA MI
2010-11-01 586-335-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROSEVILLE MI
2010-10-28 586-265-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2010-10-27 586-335-5XXX 5000–5999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2010-10-22 586-277-6XXX 6000–6999Assigned METROPCS, INC. 5562 NEW HAVEN MI
2010-10-19 586-335-3XXX 3000–3999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2010-10-05 586-209-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROSEVILLE MI
2010-10-05 586-209-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROSEVILLE MI
2010-10-05 586-330-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E NEWBALTIMR MI
2010-10-05 586-335-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROSEVILLE MI
2010-09-24 586-804-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WARREN MI

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.