NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

9 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 872
NEW CINGULAR WIRELESS PCS, LLC - IL 8
8X8, INC. 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
2023-06-13 872-330-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2023-06-13 872-330-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2023-06-13 872-330-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2023-06-13 872-330-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2023-06-13 872-367-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2023-06-09 872-319-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2023-06-08 872-316-5XXX 5000–5999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2023-06-08 872-316-6XXX 6000–6999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2023-06-08 872-316-8XXX 8000–8999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2023-06-08 872-316-9XXX 9000–9999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2023-06-08 872-326-1XXX 1000–1999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2023-06-08 872-328-7XXX 7000–7999Assigned ONVOY, LLC 224C CHICGOZN06 IL
2023-06-08 872-335-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN03 IL
2023-06-08 872-352-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN09 IL
2023-06-08 872-352-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN09 IL
2023-06-08 872-352-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN09 IL
2023-06-07 872-316-3XXX 3000–3999Assigned IP HORIZON LLC 515J CHICGOZN07 IL
2023-06-07 872-316-4XXX 4000–4999Assigned IP HORIZON LLC 515J CHICGOZN07 IL
2023-06-07 872-320-5XXX 5000–5999Assigned IP HORIZON LLC 515J CHICGOZN10 IL
2023-06-07 872-324-5XXX 5000–5999Assigned IP HORIZON LLC 515J CHICGOZN09 IL
2023-06-07 872-325-0XXX 0000–0999Assigned IP HORIZON LLC 515J CHICGOZN02 IL
2023-06-07 872-325-1XXX 1000–1999Assigned IP HORIZON LLC 515J CHICGOZN02 IL
2023-06-07 872-327-7XXX 7000–7999Assigned IP HORIZON LLC 515J CHICGOZN04 IL
2023-06-07 872-328-8XXX 8000–8999Assigned IP HORIZON LLC 515J CHICGOZN06 IL
2023-06-07 872-328-9XXX 9000–9999Assigned IP HORIZON LLC 515J CHICGOZN06 IL
2023-06-07 872-346-7XXX 7000–7999Assigned IP HORIZON LLC 515J CHICGOZN04 IL
2023-06-07 872-372-0XXX 0000–0999Assigned IP HORIZON LLC 515J CHICGOZN05 IL
2023-06-07 872-372-1XXX 1000–1999Assigned IP HORIZON LLC 515J CHICGOZN05 IL
2023-06-07 872-674-6XXX 6000–6999Assigned IP HORIZON LLC 515J CHICGOZN08 IL
2023-06-07 872-674-7XXX 7000–7999Assigned IP HORIZON LLC 515J CHICGOZN08 IL
2023-06-07 872-842-0XXX 0000–0999Assigned IP HORIZON LLC 515J CHICGOZN11 IL
2023-06-05 872-335-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2023-06-02 872-324-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN09 IL
2023-06-02 872-324-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN09 IL
2023-06-02 872-324-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN09 IL
2023-05-25 872-313-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN08 IL
2023-05-25 872-320-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN10 IL
2023-05-25 872-325-2XXX 2000–2999Assigned ONVOY, LLC 224C CHICGOZN02 IL
2023-05-25 872-326-8XXX 8000–8999Assigned ONVOY, LLC 224C CHICGOZN07 IL
2023-05-25 872-327-9XXX 9000–9999Assigned ONVOY, LLC 224C CHICGOZN04 IL
2023-05-25 872-328-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN06 IL
2023-05-25 872-328-5XXX 5000–5999Assigned ONVOY, LLC 224C CHICGOZN06 IL
2023-05-25 872-332-3XXX 3000–3999Assigned ONVOY, LLC 224C CHICGOZN02 IL
2023-05-25 872-332-4XXX 4000–4999Assigned ONVOY, LLC 224C CHICGOZN02 IL
2023-05-25 872-372-8XXX 8000–8999Assigned ONVOY, LLC 224C CHICGOZN05 IL
2023-05-24 872-262-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN09 IL
2023-05-17 872-328-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN06 IL
2023-05-17 872-328-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN06 IL
2023-05-01 872-335-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2023-05-01 872-335-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL

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.