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
2022-10-10 313-604-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2022-10-10 313-604-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2022-10-10 313-604-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2022-10-10 313-604-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2022-10-04 313-500-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2022-10-04 313-500-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2022-10-04 313-500-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2022-10-04 313-500-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2022-10-04 313-986-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2022-09-19 313-639-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2022-09-01 313-540-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI
2022-09-01 313-540-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI
2022-08-29 313-500-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2022-08-29 313-500-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2022-08-29 313-500-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2022-08-29 313-500-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2022-08-29 313-500-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2022-08-26 313-639-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2022-08-26 313-639-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2022-08-26 313-639-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2022-08-26 313-639-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2022-08-26 313-639-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H DETROITZN1 MI
2022-08-10 313-419-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2022-08-10 313-419-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2022-08-10 313-419-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2022-08-10 313-419-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2022-08-10 313-419-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2022-08-10 313-419-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2022-08-10 313-419-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2022-08-10 313-419-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2022-08-10 313-419-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2022-08-10 313-419-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2022-07-28 313-639-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2022-07-28 313-639-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2022-07-27 313-394-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2022-07-27 313-487-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2022-07-27 313-487-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2022-07-27 313-746-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2022-07-27 313-746-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2022-07-27 313-746-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2022-07-27 313-896-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2022-07-27 313-899-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2022-07-22 313-331-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2022-07-22 313-417-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2022-07-22 313-490-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2022-07-22 313-490-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2022-07-22 313-490-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2022-07-22 313-626-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2022-07-22 313-640-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2022-07-22 313-726-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C 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.