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
2021-12-15 313-569-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2021-12-15 313-569-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2021-12-15 313-569-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2021-12-15 313-859-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2021-12-14 313-569-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C DETROITZN5 MI
2021-12-14 313-569-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN5 MI
2021-12-14 313-569-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN5 MI
2021-12-14 313-569-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN5 MI
2021-11-29 313-489-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN5 MI
2021-11-29 313-540-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G DETROITZN4 MI
2021-11-24 313-504-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN3 MI
2021-11-24 313-504-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN3 MI
2021-11-19 313-360-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2021-11-19 313-360-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2021-11-19 313-360-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2021-11-19 313-360-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2021-11-19 313-360-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2021-11-19 313-360-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2021-11-19 313-360-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2021-11-19 313-612-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2021-11-19 313-612-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2021-11-19 313-612-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2021-11-18 313-490-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DETROITZN6 MI
2021-11-18 313-490-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DETROITZN6 MI
2021-11-05 313-360-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DETROITZN1 MI
2021-11-05 313-360-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DETROITZN1 MI
2021-11-05 313-360-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DETROITZN1 MI
2021-11-03 313-612-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-11-03 313-612-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-11-03 313-612-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-11-03 313-612-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-11-03 313-612-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-10-28 313-540-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI
2021-10-28 313-540-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI
2021-10-28 313-540-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI
2021-10-20 313-597-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C DETROITZN5 MI
2021-10-20 313-597-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C DETROITZN5 MI
2021-10-19 313-483-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2021-10-19 313-540-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D DETROITZN4 MI
2021-10-18 313-489-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN5 MI
2021-10-18 313-489-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN5 MI
2021-10-18 313-489-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN5 MI
2021-10-18 313-489-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN5 MI
2021-10-18 313-489-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN5 MI
2021-10-14 313-493-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN4 MI
2021-10-14 313-514-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN4 MI
2021-10-13 313-650-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN6 MI
2021-10-13 313-650-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN6 MI
2021-10-13 313-650-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN6 MI
2021-10-13 313-791-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN6 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.