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
2021-09-13 586-334-1XXX 1000–1999Assigned COMMIO, LLC 939H ROSEVILLE MI
2021-09-13 586-334-2XXX 2000–2999Assigned COMMIO, LLC 939H ROSEVILLE MI
2021-09-13 586-334-3XXX 3000–3999Assigned COMMIO, LLC 939H ROSEVILLE MI
2021-09-13 586-334-8XXX 8000–8999Assigned COMMIO, LLC 939H ROSEVILLE MI
2021-09-13 586-334-9XXX 9000–9999Assigned COMMIO, LLC 939H ROSEVILLE MI
2021-09-13 586-544-0XXX 0000–0999Assigned COMMIO, LLC 939H UTICA MI
2021-09-13 586-544-1XXX 1000–1999Assigned COMMIO, LLC 939H UTICA MI
2021-09-13 586-544-3XXX 3000–3999Assigned COMMIO, LLC 939H UTICA MI
2021-09-13 586-544-9XXX 9000–9999Assigned COMMIO, LLC 939H UTICA MI
2021-09-13 586-930-9XXX 9000–9999Assigned COMMIO, LLC 939H UTICA MI
2021-08-26 586-287-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT CLEMENS MI
2021-08-26 586-287-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT CLEMENS MI
2021-08-26 586-316-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E WARREN MI
2021-08-26 586-316-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E WARREN MI
2021-08-26 586-316-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E WARREN MI
2021-08-26 586-316-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E WARREN MI
2021-08-26 586-316-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E WARREN MI
2021-08-17 586-345-6XXX 6000–6999Assigned FRACTEL, LLC 965H MT CLEMENS MI
2021-08-12 586-334-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROSEVILLE MI
2021-08-03 586-355-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C RICHMOND MI
2021-08-02 586-287-5XXX 5000–5999Assigned COMMIO, LLC 939H MT CLEMENS MI
2021-08-02 586-287-6XXX 6000–6999Assigned COMMIO, LLC 939H MT CLEMENS MI
2021-08-02 586-287-7XXX 7000–7999Assigned COMMIO, LLC 939H MT CLEMENS MI
2021-08-02 586-287-8XXX 8000–8999Assigned COMMIO, LLC 939H MT CLEMENS MI
2021-08-02 586-287-9XXX 9000–9999Assigned COMMIO, LLC 939H MT CLEMENS MI
2021-07-30 586-334-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2021-07-30 586-334-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2021-07-30 586-334-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2021-07-30 586-334-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C ROSEVILLE MI
2021-07-20 586-325-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C NEWBALTIMR MI
2021-07-20 586-325-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C NEWBALTIMR MI
2021-07-20 586-325-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C NEWBALTIMR MI
2021-07-20 586-325-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C NEWBALTIMR MI
2021-07-01 586-366-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J ARMADA MI
2021-06-30 586-894-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C ROMEO MI
2021-06-30 586-894-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C ROMEO MI
2021-06-25 586-304-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C NEW HAVEN MI
2021-06-23 586-928-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C NEW HAVEN MI
2021-06-16 586-284-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2021-06-16 586-284-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2021-06-16 586-284-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2021-06-16 586-284-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C WASHINGTON MI
2021-06-14 586-355-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C RICHMOND MI
2021-06-14 586-355-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C RICHMOND MI
2021-06-14 586-366-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C ARMADA MI
2021-06-14 586-366-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C ARMADA MI
2021-06-03 586-287-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT CLEMENS MI
2021-06-01 586-287-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J MT CLEMENS MI
2021-05-26 586-287-1XXX 1000–1999Assigned STRATUS NETWORKS 495J MT CLEMENS MI
2021-05-18 586-207-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H WASHINGTON 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.