NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 872
BOOST SUBSCRIBERCO L.L.C. 67
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
2026-08-18 872-387-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN09 IL
2026-08-18 872-387-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN09 IL
2026-08-04 872-367-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN04 IL
2026-08-04 872-855-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN04 IL
2026-08-04 872-855-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN04 IL
2026-06-09 872-900-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN05 IL
2026-06-09 872-900-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN05 IL
2026-06-09 872-900-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN05 IL
2026-04-01 872-878-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN07 IL
2026-04-01 872-878-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN07 IL
2026-04-01 872-878-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN07 IL
2026-04-01 872-878-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN07 IL
2026-04-01 872-878-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN07 IL
2026-03-23 872-822-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN07 IL
2026-03-02 872-392-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2026-03-02 872-392-2XXX 2000–2999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2026-03-02 872-392-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2026-03-02 872-392-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2026-03-02 872-392-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2026-03-02 872-392-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2026-03-02 872-392-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2026-01-09 872-390-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN06 IL
2026-01-09 872-390-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN06 IL
2026-01-09 872-390-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN06 IL
2026-01-09 872-390-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN06 IL
2025-12-05 872-388-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN03 IL
2025-12-05 872-388-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN03 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
2025-06-10 872-383-2XXX 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
2025-06-02 872-364-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN01 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
2024-12-12 872-224-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN06 IL
2024-12-12 872-224-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN06 IL
2024-12-12 872-350-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN06 IL
2024-08-14 872-370-2XXX 2000–2999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2024-08-14 872-370-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2024-08-14 872-370-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2024-08-14 872-370-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2024-08-14 872-370-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2024-08-14 872-370-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN08 IL
2024-07-19 872-300-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN07 IL
2024-07-19 872-300-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHICGOZN07 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.