NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

9 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2025-09-26 872-386-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2025-09-26 872-386-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2025-09-24 872-388-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICGOZN03 IL
2025-09-22 872-382-1XXX 1000–1999Assigned ONVOY, LLC 224C CHICGOZN10 IL
2025-09-22 872-383-5XXX 5000–5999Assigned ONVOY, LLC 224C CHICGOZN05 IL
2025-09-22 872-387-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICGOZN09 IL
2025-09-22 872-387-1XXX 1000–1999Assigned ONVOY, LLC 224C CHICGOZN09 IL
2025-09-12 872-363-6XXX 6000–6999Assigned HD CARRIER LLC 321J CHICGOZN05 IL
2025-09-12 872-363-7XXX 7000–7999Assigned HD CARRIER LLC 321J CHICGOZN05 IL
2025-09-12 872-380-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2025-09-12 872-380-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2025-09-12 872-380-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2025-09-12 872-380-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN03 IL
2025-09-12 872-385-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN09 IL
2025-09-12 872-385-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN09 IL
2025-09-12 872-385-5XXX 5000–5999Assigned HD CARRIER LLC 321J CHICGOZN09 IL
2025-09-12 872-385-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN09 IL
2025-09-12 872-385-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN09 IL
2025-09-12 872-386-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2025-09-12 872-386-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2025-09-12 872-386-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHICGOZN10 IL
2025-09-12 872-799-9XXX 9000–9999Assigned HD CARRIER LLC 321J CHICGOZN10 IL
2025-08-19 872-385-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2025-08-19 872-385-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2025-08-19 872-385-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2025-08-19 872-385-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2025-08-14 872-385-0XXX 0000–0999Assigned ONVOY, LLC 224C CHICGOZN09 IL
2025-07-31 872-253-2XXX 2000–2999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2025-07-31 872-370-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2025-07-31 872-370-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2025-07-30 872-381-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN09 IL
2025-07-30 872-381-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN09 IL
2025-07-10 872-384-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2025-07-01 872-381-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2025-07-01 872-381-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2025-07-01 872-381-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN09 IL
2025-07-01 872-384-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2025-07-01 872-384-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2025-06-10 872-383-2XXX 2000–2999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN05 IL
2025-06-10 872-383-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN05 IL
2025-06-10 872-383-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN05 IL
2025-06-09 872-384-0XXX 0000–0999Assigned LEAP TELECOM, LLC 616J CHICGOZN02 IL
2025-06-09 872-384-1XXX 1000–1999Assigned LEAP TELECOM, LLC 616J CHICGOZN02 IL
2025-06-02 872-364-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN01 IL
2025-05-19 872-384-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2025-05-19 872-384-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2025-04-30 872-349-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN07 IL
2025-04-30 872-349-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN07 IL
2025-04-30 872-349-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN07 IL
2025-04-25 872-376-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN02 IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.