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
2021-05-18 586-280-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H MT CLEMENS MI
2021-05-18 586-331-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ROMEO MI
2021-05-18 586-355-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H RICHMOND MI
2021-05-18 586-544-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H UTICA MI
2021-05-18 586-601-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ROSEVILLE MI
2021-05-18 586-928-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H NEW HAVEN MI
2021-05-18 586-981-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H WARREN MI
2021-05-17 586-278-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H CENTERLINE MI
2021-05-12 586-278-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J CENTERLINE MI
2021-05-05 586-280-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D MT CLEMENS MI
2021-05-05 586-280-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D MT CLEMENS MI
2021-04-28 586-280-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-04-28 586-280-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-04-28 586-280-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-04-28 586-280-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-04-28 586-280-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-04-28 586-280-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-04-28 586-280-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-04-28 586-355-0XXX 0000–0999Assigned STRATUS NETWORKS 495J RICHMOND MI
2021-04-23 586-648-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H NEWBALTIMR MI
2021-04-23 586-648-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H NEWBALTIMR MI
2021-03-26 586-928-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C NEW HAVEN MI
2021-03-26 586-928-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C NEW HAVEN MI
2021-03-22 586-585-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROSEVILLE MI
2021-02-23 586-271-5XXX 5000–5999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G NEW HAVEN MI
2021-02-03 586-500-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C NEWBALTIMR MI
2021-02-03 586-500-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C NEWBALTIMR MI
2021-02-03 586-588-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C ARMADA MI
2021-02-01 586-207-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2021-02-01 586-935-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2021-02-01 586-981-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C WARREN MI
2021-02-01 586-981-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C WARREN MI
2021-02-01 586-981-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C WARREN MI
2021-01-27 586-461-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT CLEMENS MI
2021-01-20 586-327-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2021-01-20 586-327-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2021-01-20 586-496-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2021-01-20 586-800-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2021-01-20 586-868-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C MT CLEMENS MI
2021-01-20 586-868-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C MT CLEMENS MI
2021-01-20 586-900-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C MT CLEMENS MI
2021-01-20 586-900-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C MT CLEMENS MI
2021-01-07 586-355-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C RICHMOND MI
2021-01-07 586-355-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C RICHMOND MI
2021-01-07 586-355-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C RICHMOND MI
2021-01-07 586-355-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C RICHMOND MI
2021-01-07 586-400-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMEO MI
2021-01-07 586-544-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C UTICA MI
2021-01-07 586-544-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C UTICA MI
2021-01-07 586-544-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C UTICA 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.