NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

6 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 313
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 4
OPENTACT INC. 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
2021-10-13 313-824-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN2 MI
2021-10-13 313-824-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN2 MI
2021-10-13 313-944-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN2 MI
2021-10-13 313-944-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN2 MI
2021-09-29 313-756-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-08-26 313-935-6XXX 6000–6999Assigned TERRA NOVA TELECOM INC. 145J DETROITZN4 MI
2021-08-23 313-394-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-08-23 313-572-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-08-23 313-899-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-08-10 313-572-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2021-08-10 313-572-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2021-08-03 313-650-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2021-08-03 313-650-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2021-08-03 313-650-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2021-08-03 313-650-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2021-08-02 313-514-0XXX 0000–0999Assigned COMMIO, LLC 939H DETROITZN4 MI
2021-08-02 313-514-1XXX 1000–1999Assigned COMMIO, LLC 939H DETROITZN4 MI
2021-08-02 313-514-2XXX 2000–2999Assigned COMMIO, LLC 939H DETROITZN4 MI
2021-08-02 313-514-8XXX 8000–8999Assigned COMMIO, LLC 939H DETROITZN4 MI
2021-08-02 313-514-9XXX 9000–9999Assigned COMMIO, LLC 939H DETROITZN4 MI
2021-08-02 313-547-0XXX 0000–0999Assigned COMMIO, LLC 939H DETROITZN5 MI
2021-08-02 313-547-1XXX 1000–1999Assigned COMMIO, LLC 939H DETROITZN5 MI
2021-08-02 313-547-2XXX 2000–2999Assigned COMMIO, LLC 939H DETROITZN5 MI
2021-08-02 313-547-3XXX 3000–3999Assigned COMMIO, LLC 939H DETROITZN5 MI
2021-08-02 313-547-8XXX 8000–8999Assigned COMMIO, LLC 939H DETROITZN5 MI
2021-07-29 313-650-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DETROITZN6 MI
2021-07-29 313-650-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DETROITZN6 MI
2021-07-29 313-650-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DETROITZN6 MI
2021-07-07 313-572-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-07-07 313-572-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-07-07 313-572-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-07-07 313-572-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-07-07 313-572-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-07-07 313-572-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-07-07 313-572-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-07-01 313-548-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2021-07-01 313-944-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2021-06-17 313-548-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN2 MI
2021-06-16 313-514-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI
2021-06-16 313-514-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI
2021-06-16 313-514-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI
2021-06-16 313-514-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI
2021-06-14 313-476-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2021-06-14 313-476-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2021-06-14 313-476-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2021-06-14 313-476-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2021-06-14 313-547-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN5 MI
2021-06-14 313-547-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN5 MI
2021-06-14 313-547-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN5 MI
2021-06-14 313-547-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C DETROITZN5 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.