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
2020-03-25 313-710-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DETROITZN1 MI
2020-03-25 313-710-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DETROITZN1 MI
2020-03-20 313-351-4XXX 4000–4999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN3 MI
2020-03-20 313-362-6XXX 6000–6999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN5 MI
2020-03-20 313-464-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN6 MI
2020-03-20 313-474-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN4 MI
2020-03-20 313-946-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN2 MI
2020-03-18 313-484-2XXX 2000–2999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN1 MI
2020-03-03 313-710-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DETROITZN1 MI
2020-02-12 313-464-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DETROITZN6 MI
2020-02-12 313-464-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DETROITZN6 MI
2019-12-20 313-946-3XXX 3000–3999Assigned FRACTEL, LLC 965H DETROITZN2 MI
2019-12-19 313-677-7XXX 7000–7999Assigned FRACTEL, LLC 965H DETROITZN4 MI
2019-12-19 313-688-8XXX 8000–8999Assigned FRACTEL, LLC 965H DETROITZN5 MI
2019-12-18 313-484-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-12-18 313-484-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-12-18 313-484-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-12-03 313-351-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN3 MI
2019-12-03 313-425-5XXX 5000–5999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN6 MI
2019-12-03 313-474-7XXX 7000–7999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN4 MI
2019-12-03 313-497-5XXX 5000–5999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN5 MI
2019-12-03 313-710-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN1 MI
2019-12-03 313-824-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN2 MI
2019-11-29 313-217-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2019-11-29 313-217-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2019-11-29 313-217-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2019-11-05 313-774-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DETROITZN1 MI
2019-10-21 313-217-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN2 MI
2019-10-17 313-484-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2019-10-16 313-484-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D DETROITZN1 MI
2019-10-14 313-880-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-10-14 313-880-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-10-14 313-880-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-10-14 313-880-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-10-08 313-405-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2019-10-08 313-495-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2019-09-25 313-474-6XXX 6000–6999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN4 MI
2019-09-17 313-880-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-09-17 313-880-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-09-16 313-464-1XXX 1000–1999Assigned EXIANT COMMUNICATIONS LLC 114J DETROITZN6 MI
2019-09-11 313-710-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2019-08-26 313-488-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DETROITZN1 MI
2019-06-18 313-880-1XXX 1000–1999Assigned VOIP INNOVATIONS, LLC 597F DETROITZN1 MI
2019-05-29 313-484-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DETROITZN1 MI
2019-05-22 313-474-5XXX 5000–5999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN4 MI
2019-05-09 313-488-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-05-09 313-488-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-05-09 313-488-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-05-09 313-488-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2019-05-09 313-488-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN1 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.