NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

70 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 667
NEW CINGULAR WIRELESS PCS, LLC - DC 38
ONVOY, LLC - MD 18
BANDWIDTH.COM CLEC, LLC - MD 6
METROPCS, INC. 2
INTRADO COMMUNICATIONS, LLC 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
2018-10-19 667-876-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-19 667-876-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-19 667-876-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-19 667-876-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-19 667-876-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-19 667-876-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-19 667-876-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-19 667-876-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-19 667-876-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-18 667-500-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-18 667-500-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-18 667-500-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-18 667-500-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ANNAPOLIS MD
2018-10-17 667-269-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELKTON MD
2018-10-17 667-269-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELKTON MD
2018-10-17 667-269-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELKTON MD
2018-10-17 667-269-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELKTON MD
2018-10-17 667-269-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELKTON MD
2018-10-17 667-269-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELKTON MD
2018-10-17 667-269-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELKTON MD
2018-10-17 667-269-7XXX 7000–7999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELKTON MD
2018-10-17 667-295-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CROFTON MD
2018-10-17 667-295-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CROFTON MD
2018-10-17 667-295-9XXX 9000–9999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CROFTON MD
2018-10-17 667-332-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 NEWWINDSOR MD
2018-10-17 667-332-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 NEWWINDSOR MD
2018-10-17 667-332-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 NEWWINDSOR MD
2018-10-17 667-366-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 HAMPSTEAD MD
2018-10-17 667-366-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 HAMPSTEAD MD
2018-10-17 667-366-8XXX 8000–8999Assigned CORE COMMUNICATIONS, INC.- MD 2593 HAMPSTEAD MD
2018-10-17 667-372-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CAMBRIDGE MD
2018-10-17 667-372-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CAMBRIDGE MD
2018-10-17 667-372-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CAMBRIDGE MD
2018-10-17 667-372-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CAMBRIDGE MD
2018-10-17 667-372-6XXX 6000–6999Assigned CORE COMMUNICATIONS, INC.- MD 2593 CAMBRIDGE MD
2018-10-17 667-373-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 NORTHBEACH MD
2018-10-17 667-373-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 NORTHBEACH MD
2018-10-17 667-373-3XXX 3000–3999Assigned CORE COMMUNICATIONS, INC.- MD 2593 NORTHBEACH MD
2018-10-17 667-382-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WINGATE MD
2018-10-17 667-382-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WINGATE MD
2018-10-17 667-382-4XXX 4000–4999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WINGATE MD
2018-10-17 667-473-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SOLOMONS MD
2018-10-17 667-473-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SOLOMONS MD
2018-10-17 667-473-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 SOLOMONS MD
2018-10-17 667-545-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WARWICK MD
2018-10-17 667-545-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WARWICK MD
2018-10-17 667-545-5XXX 5000–5999Assigned CORE COMMUNICATIONS, INC.- MD 2593 WARWICK MD
2018-10-17 667-686-0XXX 0000–0999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELLICOTTCY MD
2018-10-17 667-686-1XXX 1000–1999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELLICOTTCY MD
2018-10-17 667-686-2XXX 2000–2999Assigned CORE COMMUNICATIONS, INC.- MD 2593 ELLICOTTCY MD

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.