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
2022-01-05 586-326-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J RICHMOND MI
2022-01-05 586-328-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J WARREN MI
2021-12-28 586-310-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H MT CLEMENS MI
2021-12-28 586-310-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H MT CLEMENS MI
2021-12-23 586-310-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MT CLEMENS MI
2021-12-23 586-328-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2021-12-23 586-328-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2021-12-23 586-328-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2021-12-23 586-328-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2021-12-23 586-328-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2021-12-23 586-328-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2021-12-23 586-328-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2021-12-21 586-301-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J WARREN MI
2021-12-15 586-894-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMEO MI
2021-11-02 586-304-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H NEW HAVEN MI
2021-11-02 586-304-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H NEW HAVEN MI
2021-11-02 586-325-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H NEWBALTIMR MI
2021-11-02 586-325-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H NEWBALTIMR MI
2021-10-29 586-326-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C RICHMOND MI
2021-10-29 586-326-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C RICHMOND MI
2021-10-20 586-207-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2021-10-20 586-284-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2021-10-20 586-284-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2021-10-19 586-278-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CENTERLINE MI
2021-10-19 586-799-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H UTICA MI
2021-10-19 586-799-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H UTICA MI
2021-10-19 586-981-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H WARREN MI
2021-10-19 586-981-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H WARREN MI
2021-10-19 586-981-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H WARREN MI
2021-10-14 586-345-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H MT CLEMENS MI
2021-10-14 586-345-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H MT CLEMENS MI
2021-09-21 586-540-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H ROMEO MI
2021-09-16 586-540-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROMEO MI
2021-09-14 586-300-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-09-14 586-345-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-09-14 586-345-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-09-14 586-345-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-09-14 586-345-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-09-14 586-345-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-09-14 586-345-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-09-14 586-345-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2021-09-13 586-284-0XXX 0000–0999Assigned COMMIO, LLC 939H WASHINGTON MI
2021-09-13 586-284-1XXX 1000–1999Assigned COMMIO, LLC 939H WASHINGTON MI
2021-09-13 586-284-8XXX 8000–8999Assigned COMMIO, LLC 939H WASHINGTON MI
2021-09-13 586-284-9XXX 9000–9999Assigned COMMIO, LLC 939H WASHINGTON MI
2021-09-13 586-316-0XXX 0000–0999Assigned COMMIO, LLC 939H WARREN MI
2021-09-13 586-316-1XXX 1000–1999Assigned COMMIO, LLC 939H WARREN MI
2021-09-13 586-316-2XXX 2000–2999Assigned COMMIO, LLC 939H WARREN MI
2021-09-13 586-316-8XXX 8000–8999Assigned COMMIO, LLC 939H WARREN MI
2021-09-13 586-316-9XXX 9000–9999Assigned COMMIO, LLC 939H 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.