NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 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
2005-02-05 301-830-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSHNGTNZN3 MD
2005-01-26 301-789-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN4 MD
2005-01-26 301-789-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN4 MD
2005-01-26 301-861-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WALDORF MD
2005-01-26 301-960-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J WSHNGTNZN3 MD
2005-01-21 301-238-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J WSNGTNZN16 MD
2005-01-21 301-377-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL236 MD
2005-01-18 301-703-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 MOUNT AIRY MD
2005-01-12 301-712-2XXX 2000–2999Assigned METROPCS, INC. 5562 FREDERICK MD
2005-01-05 301-356-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2005-01-05 301-356-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL236 MD
2005-01-05 301-395-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2005-01-05 301-787-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN3 MD
2004-12-22 301-476-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ASHTON236 MD
2004-12-22 301-476-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ASHTON236 MD
2004-12-22 301-476-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ASHTON236 MD
2004-12-22 301-658-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ASHTON236 MD
2004-12-22 301-658-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ASHTON236 MD
2004-12-22 301-658-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ASHTON236 MD
2004-12-22 301-658-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ASHTON236 MD
2004-12-22 301-658-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ASHTON236 MD
2004-12-22 301-658-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ASHTON236 MD
2004-12-20 301-358-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNG236Z15 MD
2004-12-20 301-358-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNG236Z15 MD
2004-12-20 301-579-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BRANDYWINE MD
2004-12-20 301-685-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 DAMASCS236 MD
2004-12-20 301-685-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 DAMASCS236 MD
2004-12-20 301-761-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNGTNZN11 MD
2004-12-20 301-761-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNGTNZN11 MD
2004-12-20 301-830-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSHNGTNZN3 MD
2004-12-20 301-830-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSHNGTNZN3 MD
2004-12-20 301-850-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNG236Z14 MD
2004-12-20 301-850-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNG236Z14 MD
2004-12-20 301-880-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 LXTNPKGRML MD
2004-12-20 301-880-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 LXTNPKGRML MD
2004-12-10 301-256-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL236 MD
2004-12-01 301-476-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ASHTON236 MD
2004-12-01 301-579-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BRANDYWINE MD
2004-12-01 301-637-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 WSNGTNZN10 MD
2004-11-17 301-395-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2004-11-17 301-395-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2004-11-17 301-395-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2004-11-17 301-395-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 LAUREL238 MD
2004-11-01 301-740-0XXX 0000–0999Assigned METROPCS, INC. 5562 GAITHERSBG MD
2004-10-21 301-556-3XXX 3000–3999Assigned METROPCS, INC. 5562 GAITHERSBG MD
2004-10-20 301-284-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNGTNZN10 MD
2004-10-20 301-291-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WSNG236Z14 MD
2004-10-14 301-256-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 LAUREL236 MD
2004-10-13 301-859-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F OAKLAND MD
2004-10-12 301-326-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN3 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.