NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

43 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 571
BANDWIDTH.COM CLEC, LLC - VA 11
ONVOY, LLC - VA 10
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 7
NEW CINGULAR WIRELESS PCS, LLC - DC 6
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6
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
2010-11-09 571-355-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-11-09 571-814-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2010-11-05 571-409-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OCCOQUAN VA
2010-11-05 571-612-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2010-11-05 571-612-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2010-11-03 571-389-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2010-11-03 571-814-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2010-10-26 571-612-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J HERNDON VA
2010-10-26 571-933-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DULLESMTRO VA
2010-10-21 571-261-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HAYMARKET VA
2010-10-21 571-316-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2010-10-21 571-406-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F TRIANGLE VA
2010-10-21 571-732-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2010-10-21 571-732-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2010-10-18 571-528-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2010-10-14 571-210-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2010-10-14 571-210-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2010-10-14 571-234-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2010-10-14 571-234-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2010-10-14 571-234-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2010-10-14 571-234-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2010-10-14 571-358-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MANASSAS VA
2010-10-14 571-358-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MANASSAS VA
2010-10-14 571-762-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MANASSAS VA
2010-10-14 571-762-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MANASSAS VA
2010-10-14 571-762-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MANASSAS VA
2010-10-14 571-814-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2010-10-13 571-305-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2010-10-13 571-305-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2010-10-13 571-305-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2010-10-13 571-305-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2010-10-13 571-305-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2010-10-13 571-305-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2010-10-13 571-488-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2010-10-13 571-488-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2010-10-12 571-612-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2010-10-12 571-732-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2010-10-12 571-732-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2010-10-12 571-989-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2010-10-12 571-989-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2010-10-12 571-989-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2010-10-12 571-989-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2010-10-08 571-210-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E ARCOLA VA
2010-10-08 571-210-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E ARCOLA VA
2010-10-08 571-488-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E WSNGTNZN17 VA
2010-10-01 571-210-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2010-10-01 571-246-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2010-10-01 571-248-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HAYMARKET VA
2010-10-01 571-261-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HAYMARKET VA
2010-10-01 571-293-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA

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.