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
2010-06-28 571-494-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F TRIANGLE VA
2010-06-28 571-529-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2010-06-24 571-420-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2010-06-14 571-319-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2010-06-14 571-319-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2010-06-14 571-319-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2010-06-14 571-319-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2010-06-11 571-319-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2010-06-11 571-659-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2010-06-08 571-335-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2010-06-07 571-208-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2010-06-07 571-319-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2010-06-07 571-422-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2010-06-07 571-455-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2010-06-04 571-420-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2010-06-02 571-572-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 OCCOQUAN VA
2010-06-02 571-572-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 OCCOQUAN VA
2010-06-02 571-575-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 OCCOQUAN VA
2010-05-27 571-248-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HAYMARKET VA
2010-05-26 571-207-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2010-05-26 571-207-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2010-05-26 571-250-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2010-05-26 571-250-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2010-05-26 571-250-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2010-05-26 571-250-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2010-05-26 571-281-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F BRADDOCK VA
2010-05-26 571-295-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2010-05-26 571-295-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2010-05-26 571-295-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2010-05-26 571-327-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2010-05-26 571-335-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2010-05-26 571-335-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2010-05-26 571-335-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2010-05-26 571-335-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2010-05-26 571-357-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2010-05-26 571-384-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2010-05-26 571-393-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MANASSAS VA
2010-05-26 571-402-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2010-05-26 571-403-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2010-05-26 571-403-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2010-05-26 571-480-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2010-05-26 571-494-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F TRIANGLE VA
2010-05-26 571-721-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2010-05-26 571-933-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E DULLESMTRO VA
2010-05-19 571-502-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2010-05-19 571-502-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2010-05-19 571-722-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2010-05-13 571-405-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J WSNGTNZN17 VA
2010-05-13 571-485-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2010-05-13 571-485-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON 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.