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
2003-02-19 586-273-2XXX 2000–2999Assigned 123.NET, LLC 2550 NEWBALTIMR MI
2003-02-19 586-580-0XXX 0000–0999Assigned 123.NET, LLC 2550 UTICA MI
2003-02-10 586-883-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2003-02-04 586-883-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2003-02-04 586-883-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2003-02-04 586-883-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2003-01-23 586-604-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2003-01-15 586-354-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2003-01-15 586-354-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2003-01-15 586-354-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2003-01-15 586-354-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2003-01-15 586-354-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2003-01-15 586-722-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2003-01-15 586-722-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2003-01-02 586-354-2XXX 2000–2999Assigned 123.NET, LLC 2550 WARREN MI
2003-01-02 586-430-0XXX 0000–0999Assigned 123.NET, LLC 2550 RICHMOND MI
2003-01-02 586-453-0XXX 0000–0999Assigned 123.NET, LLC 2550 ROMEO MI
2003-01-02 586-649-2XXX 2000–2999Assigned 123.NET, LLC 2550 MT CLEMENS MI
2002-12-19 586-439-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROSEVILLE MI
2002-12-19 586-580-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 UTICA MI
2002-12-19 586-782-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CENTERLINE MI
2002-12-19 586-933-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 WARREN MI
2002-12-17 586-354-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2002-11-15 586-604-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2002-11-07 586-354-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
— 586-580-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E UTICA MI
— 586-723-2XXX 2000–2999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L MT CLEMENS MI
— 586-723-3XXX 3000–3999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L MT CLEMENS MI
— 586-723-4XXX 4000–4999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L MT CLEMENS MI
— 586-723-5XXX 5000–5999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L MT CLEMENS MI
— 586-723-6XXX 6000–6999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L MT CLEMENS 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.