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
2009-01-14 571-377-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MANASSAS VA
2009-01-14 571-403-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2009-01-14 571-408-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F OCCOQUAN VA
2009-01-14 571-449-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2009-01-14 571-449-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2009-01-14 571-482-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2009-01-14 571-482-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2009-01-14 571-766-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2009-01-14 571-766-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2009-01-13 571-354-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2009-01-12 571-346-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2009-01-07 571-281-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E BRADDOCK VA
2009-01-07 571-281-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E BRADDOCK VA
2009-01-07 571-308-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2009-01-07 571-308-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2009-01-07 571-339-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E ENGLESIDE VA
2009-01-07 571-377-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2008-12-31 571-327-7XXX 7000–7999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2008-12-31 571-327-9XXX 9000–9999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2008-12-29 571-269-0XXX 0000–0999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2008-12-29 571-269-1XXX 1000–1999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2008-12-29 571-269-2XXX 2000–2999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2008-12-29 571-269-3XXX 3000–3999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2008-12-29 571-269-4XXX 4000–4999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2008-12-29 571-269-5XXX 5000–5999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2008-12-29 571-269-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2008-12-29 571-374-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 INDENDNTHL VA
2008-12-22 571-223-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEESBURG VA
2008-12-11 571-314-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2008-12-11 571-314-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2008-12-11 571-314-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2008-12-11 571-314-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2008-12-11 571-314-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2008-12-11 571-314-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2008-12-11 571-882-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2008-12-08 571-449-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2008-12-05 571-329-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2008-12-01 571-482-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2008-11-25 571-449-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2008-11-13 571-255-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2008-11-13 571-354-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2008-11-13 571-485-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2008-11-07 571-252-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2008-10-22 571-256-0XXX 0000–0999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2008-10-22 571-256-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2008-10-22 571-256-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2008-10-22 571-256-3XXX 3000–3999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2008-10-22 571-256-4XXX 4000–4999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2008-10-22 571-256-5XXX 5000–5999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2008-10-22 571-256-6XXX 6000–6999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 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.