NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 223
BOOST SUBSCRIBERCO L.L.C. 2
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
2026-09-08 223-358-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHAMBERSBG PA
2026-09-02 223-384-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J YORK PA
2026-04-08 223-358-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHAMBERSBG PA
2025-07-31 223-373-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J HARISBGZN1 PA
2025-07-31 223-373-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J HARISBGZN1 PA
2025-05-14 223-358-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHAMBERSBG PA
2025-05-14 223-358-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHAMBERSBG PA
2025-04-18 223-365-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J LANCASTER PA
2025-03-13 223-370-4XXX 4000–4999Assigned BOOST SUBSCRIBERCO L.L.C. 490J YORK PA
2023-12-15 223-277-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BELLEVILLE PA
2023-12-15 223-326-3XXX 3000–3999Assigned BOOST SUBSCRIBERCO L.L.C. 490J WAYNESBORO PA
2022-12-01 223-323-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J TERRE HILL PA
2022-08-23 223-274-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J MCONELLSBG PA
2022-08-18 223-268-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J ELIZABTHVL PA
2022-08-18 223-282-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J NEWBLOMFLD PA
2022-08-18 223-293-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J FAWN GROVE PA
2022-01-12 223-267-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J HANOVER PA
2022-01-12 223-272-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J GETTYSBURG PA
2022-01-12 223-533-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CARLISLE PA
2022-01-12 223-733-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J CHAMBERSBG PA
2022-01-11 223-258-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J LITITZ PA
2021-12-28 223-300-8XXX 8000–8999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BROGUE PA
2021-12-23 223-271-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J LANCASTER PA
2021-12-17 223-270-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J LEBANON PA
2021-12-15 223-299-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J YORK PA

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.