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
2010-03-19 586-799-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E UTICA MI
2010-03-19 586-804-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WARREN MI
2010-03-05 586-404-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2010-03-02 586-480-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2010-03-02 586-480-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2010-02-10 586-745-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WASHINGTON MI
2010-01-28 586-457-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2010-01-28 586-457-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2010-01-25 586-372-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROMEO MI
2010-01-25 586-646-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E NEW HAVEN MI
2010-01-25 586-648-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E NEWBALTIMR MI
2010-01-12 586-231-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2010-01-12 586-372-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ROMEO MI
2010-01-12 586-464-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2009-12-28 586-244-9XXX 9000–9999Assigned METROPCS, INC. 5562 NEW HAVEN MI
2009-12-17 586-404-2XXX 2000–2999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2009-12-17 586-404-3XXX 3000–3999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2009-12-10 586-339-2XXX 2000–2999Assigned METROPCS, INC. 5562 NEW HAVEN MI
2009-12-09 586-209-8XXX 8000–8999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2009-12-09 586-209-9XXX 9000–9999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2009-12-07 586-231-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MT CLEMENS MI
2009-11-09 586-565-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2009-11-09 586-565-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2009-10-26 586-722-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WARREN MI
2009-10-21 586-244-6XXX 6000–6999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L NEW HAVEN MI
2009-10-21 586-330-7XXX 7000–7999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L NEWBALTIMR MI
2009-10-21 586-421-8XXX 8000–8999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L MT CLEMENS MI
2009-10-21 586-430-7XXX 7000–7999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L RICHMOND MI
2009-10-21 586-540-6XXX 6000–6999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L ROMEO MI
2009-10-21 586-784-3XXX 3000–3999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L ARMADA MI
2009-10-21 586-786-2XXX 2000–2999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L WASHINGTON MI
2009-10-15 586-232-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J WASHINGTON MI
2009-10-15 586-928-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J NEW HAVEN MI
2009-10-14 586-625-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J ARMADA MI
2009-10-14 586-648-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J NEWBALTIMR MI
2009-10-13 586-372-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J ROMEO MI
2009-10-13 586-565-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J WARREN MI
2009-10-05 586-209-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ROSEVILLE MI
2009-10-05 586-231-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J MT CLEMENS MI
2009-10-05 586-467-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J CENTERLINE MI
2009-10-05 586-991-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J UTICA MI
2009-09-03 586-209-7XXX 7000–7999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2009-09-02 586-209-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2009-09-02 586-209-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2009-09-02 586-553-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2009-09-02 586-553-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2009-09-02 586-553-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2009-09-02 586-553-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2009-09-02 586-553-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2009-09-02 586-553-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 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.