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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2020-07-16 586-585-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROSEVILLE MI
2020-06-25 586-500-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H NEWBALTIMR MI
2020-06-25 586-500-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H NEWBALTIMR MI
2020-06-25 586-500-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H NEWBALTIMR MI
2020-06-22 586-600-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C CENTERLINE MI
2020-06-22 586-600-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C CENTERLINE MI
2020-06-19 586-500-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C NEWBALTIMR MI
2020-06-19 586-500-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C NEWBALTIMR MI
2020-06-18 586-371-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2020-06-18 586-371-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2020-06-02 586-271-1XXX 1000–1999Assigned METROPCS, INC. 5562 NEW HAVEN MI
2020-06-02 586-271-2XXX 2000–2999Assigned METROPCS, INC. 5562 NEW HAVEN MI
2020-06-02 586-271-3XXX 3000–3999Assigned METROPCS, INC. 5562 NEW HAVEN MI
2020-06-02 586-271-4XXX 4000–4999Assigned METROPCS, INC. 5562 NEW HAVEN MI
2020-06-02 586-525-1XXX 1000–1999Assigned METROPCS, INC. 5562 ARMADA MI
2020-06-02 586-525-2XXX 2000–2999Assigned METROPCS, INC. 5562 ARMADA MI
2020-05-21 586-525-4XXX 4000–4999Assigned METROPCS, INC. 5562 ARMADA MI
2020-05-21 586-525-5XXX 5000–5999Assigned METROPCS, INC. 5562 ARMADA MI
2020-05-15 586-327-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2020-05-15 586-327-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2020-05-15 586-327-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2020-05-15 586-327-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2020-05-15 586-400-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C ROMEO MI
2020-05-15 586-400-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C ROMEO MI
2020-05-15 586-701-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C NEW HAVEN MI
2020-05-15 586-701-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C NEW HAVEN MI
2020-04-28 586-619-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G CENTERLINE MI
2020-03-12 586-600-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CENTERLINE MI
2020-03-12 586-600-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CENTERLINE MI
2020-03-12 586-600-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CENTERLINE MI
2020-03-11 586-303-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E WARREN MI
2020-02-27 586-600-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CENTERLINE MI
2020-01-16 586-800-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROSEVILLE MI
2020-01-09 586-290-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C RICHMOND MI
2020-01-09 586-290-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C RICHMOND MI
2019-12-20 586-300-0XXX 0000–0999Assigned FRACTEL, LLC 965H MT CLEMENS MI
2019-12-20 586-400-0XXX 0000–0999Assigned FRACTEL, LLC 965H ROMEO MI
2019-12-20 586-400-4XXX 4000–4999Assigned FRACTEL, LLC 965H ROMEO MI
2019-12-20 586-400-7XXX 7000–7999Assigned FRACTEL, LLC 965H ROMEO MI
2019-12-20 586-788-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 UTICA MI
2019-12-20 586-788-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 UTICA MI
2019-12-19 586-600-0XXX 0000–0999Assigned FRACTEL, LLC 965H CENTERLINE MI
2019-12-19 586-600-6XXX 6000–6999Assigned FRACTEL, LLC 965H CENTERLINE MI
2019-12-18 586-788-8XXX 8000–8999Assigned FRACTEL, LLC 965H UTICA MI
2019-11-29 586-900-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C MT CLEMENS MI
2019-11-29 586-900-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C MT CLEMENS MI
2019-11-29 586-900-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C MT CLEMENS MI
2019-11-20 586-496-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2019-11-20 586-496-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2019-10-21 586-271-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G NEW HAVEN 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.