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 301
ONVOY, LLC - MD 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
2018-10-11 301-313-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-397-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-430-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z14 MD
2018-10-11 301-430-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z14 MD
2018-10-11 301-430-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z14 MD
2018-10-11 301-470-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z14 MD
2018-10-11 301-477-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-477-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-479-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-479-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-479-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-486-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-486-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-486-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-574-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSNG236Z15 MD
2018-10-11 301-632-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WALDORF MD
2018-10-11 301-632-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WALDORF MD
2018-10-11 301-666-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z14 MD
2018-10-11 301-666-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z14 MD
2018-10-11 301-666-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z14 MD
2018-10-11 301-719-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNGTNZN16 MD
2018-10-11 301-719-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNGTNZN16 MD
2018-10-11 301-860-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z14 MD
2018-10-11 301-923-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-935-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-935-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-935-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-935-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-935-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-11 301-939-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WSNG236Z13 MD
2018-10-10 301-391-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DAMASCS236 MD
2018-10-10 301-391-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DAMASCS236 MD
2018-10-10 301-391-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DAMASCS236 MD
2018-10-10 301-391-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DAMASCS236 MD
2018-10-10 301-391-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DAMASCS236 MD
2018-10-10 301-391-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DAMASCS236 MD
2018-10-10 301-391-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DAMASCS236 MD
2018-10-10 301-391-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DAMASCS236 MD
2018-10-10 301-414-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DAMASCS236 MD
2018-10-10 301-482-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DAMASCS236 MD
2018-10-10 301-482-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DAMASCS236 MD
2018-10-10 301-482-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 DAMASCS236 MD
2018-10-10 301-914-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 OAKLAND MD
2018-10-10 301-914-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 OAKLAND MD
2018-10-10 301-914-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 OAKLAND MD
2018-10-10 301-914-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 OAKLAND MD
2018-10-10 301-914-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 OAKLAND MD
2018-10-10 301-914-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 OAKLAND MD
2018-10-10 301-914-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 OAKLAND MD
2018-10-10 301-914-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 OAKLAND 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.