NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

10 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 517
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 5
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 1
LEVEL 3 COMMUNICATIONS, LLC - MI 1
INTRADO COMMUNICATIONS, LLC 1
BOOST SUBSCRIBERCO L.L.C. 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
2011-02-07 517-513-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 JACKSON MI
2011-02-04 517-489-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-02-04 517-489-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-02-04 517-489-8XXX 8000–8999Assigned METROPCS, INC. 5562 LANSING MI
2011-02-04 517-489-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-02-04 517-528-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-02-04 517-528-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-02-04 517-528-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-02-04 517-528-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-02-04 517-528-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-02-04 517-528-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-02-04 517-528-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-02-04 517-528-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-02-04 517-528-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-02-04 517-802-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2011-01-24 517-358-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 JACKSON MI
2011-01-24 517-358-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 JACKSON MI
2011-01-20 517-984-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C WEBBERVL MI
2011-01-07 517-219-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FOWLERVL MI
2010-12-23 517-489-6XXX 6000–6999Assigned METROPCS, INC. 5562 LANSING MI
2010-12-23 517-489-7XXX 7000–7999Assigned METROPCS, INC. 5562 LANSING MI
2010-12-23 517-715-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C FOWLERVL MI
2010-12-21 517-467-1XXX 1000–1999Assigned TC3 TELECOM, INC. - MI 3459 ONSTED MI
2010-12-16 517-489-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 LANSING MI
2010-12-15 517-992-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C WILLIAMSTN MI
2010-12-08 517-235-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C DIMONDALE MI
2010-12-08 517-607-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HILLSDALE MI
2010-11-11 517-662-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ADRIAN MI
2010-11-04 517-200-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LITCHFIELD MI
2010-11-04 517-462-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 COLDWATER MI
2010-11-04 517-756-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 UNION CITY MI
2010-11-04 517-932-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ALLEN MI
2010-11-02 517-436-1XXX 1000–1999Assigned TC3 TELECOM, INC. - MI 3459 SAND CREEK MI
2010-11-01 517-489-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 LANSING MI
2010-10-29 517-447-6XXX 6000–6999Assigned TC3 TELECOM, INC. - MI 3459 DEERFIELD MI
2010-10-28 517-366-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ADRIAN MI
2010-10-28 517-677-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 COLDWATER MI
2010-10-26 517-492-8XXX 8000–8999Assigned TELNET WORLDWIDE, INC. 817J LANSING MI
2010-10-19 517-412-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C GRANDLEDGE MI
2010-10-18 517-395-5XXX 5000–5999Assigned METROPCS, INC. 5562 JACKSON MI
2010-10-08 517-431-6XXX 6000–6999Assigned TC3 TELECOM, INC. - MI 3459 TIPTON MI
2010-10-06 517-451-6XXX 6000–6999Assigned TC3 TELECOM, INC. - MI 3459 BRITTON MI
2010-10-04 517-489-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E LANSING MI
2010-10-01 517-213-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CHARLOTTE MI
2010-09-29 517-227-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLDWATER MI
2010-09-29 517-358-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2010-09-29 517-366-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ADRIAN MI
2010-09-28 517-798-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2010-09-28 517-798-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL MI
2010-09-28 517-798-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWELL 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.