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
2019-09-27 517-577-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C ADRIAN MI
2019-09-27 517-577-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C ADRIAN MI
2019-09-25 517-208-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G BRITTON MI
2019-09-25 517-273-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G HOWELL MI
2019-09-13 517-800-0XXX 0000–0999Assigned FRACTEL, LLC 965H JACKSON MI
2019-09-13 517-800-8XXX 8000–8999Assigned FRACTEL, LLC 965H JACKSON MI
2019-09-04 517-730-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2019-08-14 517-343-8XXX 8000–8999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L ALBION MI
2019-08-02 517-246-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G LANSING MI
2019-08-02 517-246-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G LANSING MI
2019-07-12 517-270-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ADRIAN MI
2019-06-19 517-730-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2019-06-18 517-329-1XXX 1000–1999Assigned VOIP INNOVATIONS, LLC 597F LANSING MI
2019-05-15 517-247-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E JACKSON MI
2019-05-08 517-237-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E LANSING MI
2019-05-08 517-237-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E LANSING MI
2019-05-08 517-237-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E LANSING MI
2019-04-24 517-465-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ALBION MI
2019-04-23 517-741-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E UNION CITY MI
2019-04-23 517-928-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MASON MI
2019-04-17 517-624-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C DE WITT MI
2019-04-11 517-604-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MASON MI
2019-04-05 517-781-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C COLDWATER MI
2019-04-05 517-781-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C COLDWATER MI
2019-02-19 517-312-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C ADRIAN MI
2019-02-19 517-312-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C ADRIAN MI
2019-02-07 517-647-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PORTLAND MI
2019-01-24 517-428-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FOWLERVL MI
2019-01-18 517-245-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FOWLERVL MI
2019-01-18 517-245-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FOWLERVL MI
2019-01-08 517-604-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MASON MI
2019-01-08 517-604-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MASON MI
2018-12-19 517-275-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2018-12-11 517-500-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C SUNFIELD MI
2018-12-03 517-257-2XXX 2000–2999Assigned METROPCS, INC. 5562 JACKSON MI
2018-11-27 517-245-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FOWLERVL MI
2018-11-27 517-457-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G TIPTON MI
2018-11-26 517-409-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G BLISSFIELD MI
2018-11-14 517-447-2XXX 2000–2999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DEERFIELD MI
2018-10-26 517-301-5XXX 5000–5999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G TECUMSEH MI
2018-10-26 517-312-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G ADRIAN MI
2018-10-26 517-401-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MORENCI MI
2018-10-25 517-317-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLDWATER MI
2018-10-01 517-409-2XXX 2000–2999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G BLISSFIELD MI
2018-10-01 517-436-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G SAND CREEK MI
2018-09-26 517-500-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C SUNFIELD MI
2018-09-20 517-200-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C LITCHFIELD MI
2018-09-20 517-790-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C MOSHERVL MI
2018-09-19 517-662-7XXX 7000–7999Assigned METROPCS, INC. 5562 ADRIAN MI
2018-09-19 517-730-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING 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.