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 410
ONVOY, LLC - MD 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
2012-05-29 410-449-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SOLOMONS MD
2012-05-24 410-656-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F NORTH EAST MD
2012-05-18 410-618-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 PERRYVILLE MD
2012-05-17 410-849-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D SHERWD FOR MD
2012-05-14 410-870-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PARKVILLE MD
2012-05-14 410-934-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ANNAPOLIS MD
2012-05-09 410-670-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J EDGEWOOD MD
2012-05-04 410-999-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F GLENBURNIE MD
2012-05-02 410-571-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ANNAPOLIS MD
2012-05-02 410-634-4XXX 4000–4999Assigned IDT AMERICA, CORP. - MD 228C RIDGELY MD
2012-04-24 410-357-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J PARKTON MD
2012-04-24 410-552-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SYKESVILLE MD
2012-03-30 410-415-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PIKESVILLE MD
2012-03-30 410-870-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PARKVILLE MD
2012-03-30 410-946-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SEVERNA PK MD
2012-03-27 410-994-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F EDGEWOOD MD
2012-03-07 410-888-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D WATERLO236 MD
2012-02-06 410-220-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D ELKRIDGE MD
2012-02-06 410-934-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D ANNAPOLIS MD
2012-01-30 410-934-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2012-01-30 410-934-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ANNAPOLIS MD
2011-12-07 410-885-7XXX 7000–7999Assigned IDT AMERICA, CORP. - MD 228C CHESAPKECY MD
2011-12-01 410-824-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WATERLO236 MD
2011-11-18 410-593-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J FORK MD
2011-11-09 410-618-2XXX 2000–2999Assigned IDT AMERICA, CORP. - MD 228C PERRYVILLE MD
2011-11-08 410-394-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 SOLOMONS MD
2011-10-12 410-885-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 CHESAPKECY MD
2011-10-12 410-927-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 ODENTON MD
2011-10-07 410-240-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-240-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-240-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-240-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-240-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-240-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-240-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-240-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-240-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-240-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-301-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-301-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-301-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-301-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-301-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-301-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-301-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-301-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-301-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-07 410-301-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-10-06 410-844-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2011-10-06 410-844-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE 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.