NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 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 667
BOOST SUBSCRIBERCO L.L.C. 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
2026-09-11 667-541-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2026-08-19 667-527-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2026-07-14 667-547-2XXX 2000–2999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2026-07-14 667-547-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2026-06-08 667-547-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2026-05-15 667-539-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2026-05-15 667-539-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2025-12-29 667-527-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2025-12-29 667-527-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2025-12-29 667-527-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2025-12-29 667-527-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2025-12-09 667-535-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J RISING SUN MD
2025-12-09 667-535-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J RISING SUN MD
2025-11-18 667-349-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J STILL POND MD
2025-09-04 667-527-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2025-09-04 667-527-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2025-09-04 667-527-2XXX 2000–2999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2025-01-02 667-495-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2025-01-02 667-495-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2025-01-02 667-495-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2025-01-02 667-495-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2025-01-02 667-495-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2025-01-02 667-495-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2024-12-19 667-417-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2024-12-19 667-417-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2024-12-19 667-417-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2024-09-17 667-487-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2024-09-17 667-487-2XXX 2000–2999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BALTIMORE MD
2024-08-26 667-447-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J COLUMBIA MD
2024-08-26 667-447-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J COLUMBIA MD
2024-05-08 667-484-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J WESTMINSTR MD
2024-05-08 667-484-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J WESTMINSTR MD
2023-12-22 667-421-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J COLUMBIA MD
2023-12-22 667-421-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J COLUMBIA MD
2023-12-11 667-244-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J STILL POND MD
2023-12-01 667-462-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J ELKTON MD
2023-05-31 667-427-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J WEST RIVER MD
2023-02-10 667-466-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J HAVREGRACE MD
2023-02-09 667-417-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2023-02-09 667-417-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GLENBURNIE MD
2022-11-23 667-420-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J FEDERALSBG MD
2022-10-05 667-743-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J QUEENSTOWN MD
2022-08-10 667-389-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CAMBRIDGE MD
2022-08-10 667-576-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J JARRETTSVL MD
2022-08-10 667-670-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J SUDLERSVL MD
2022-08-10 667-788-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J WESTMINSTR MD
2021-12-10 667-384-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J SALISBURY MD
2021-12-10 667-385-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J SOLOMONS MD

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.