NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

41 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
ONVOY, LLC - VA 10
BANDWIDTH.COM CLEC, LLC - VA 9
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
2014-08-22 571-290-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2014-08-22 571-424-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2014-08-14 571-298-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2014-08-14 571-446-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2014-08-14 571-510-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2014-08-14 571-781-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F NOKESVILLE VA
2014-08-13 571-599-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2014-08-12 571-290-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2014-08-12 571-446-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2014-08-08 571-758-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DULLES VA
2014-08-08 571-888-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DULLES VA
2014-08-07 571-424-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2014-08-07 571-424-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2014-08-07 571-919-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2014-08-05 571-290-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2014-08-04 571-932-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LORTONMTRO VA
2014-07-31 571-919-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2014-07-10 571-339-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E ENGLESIDE VA
2014-07-10 571-526-0XXX 0000–0999Assigned ONVOY, LLC - VA 138E HERNDON VA
2014-07-10 571-620-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E WSNGTNZN17 VA
2014-07-07 571-353-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2014-07-01 571-526-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E HERNDON VA
2014-06-26 571-510-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LEESBURG VA
2014-06-19 571-375-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2014-06-17 571-279-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2014-06-17 571-348-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LORTON VA
2014-06-17 571-353-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2014-06-17 571-424-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2014-06-17 571-758-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DULLES VA
2014-06-17 571-982-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2014-06-16 571-367-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2014-06-16 571-982-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2014-06-16 571-982-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2014-06-16 571-982-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2014-06-10 571-620-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2014-06-09 571-290-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2014-06-05 571-206-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2014-06-05 571-442-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2014-05-22 571-367-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ARCOLA VA
2014-05-22 571-888-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DULLES VA
2014-05-21 571-494-3XXX 3000–3999Assigned METROPCS, INC. 5562 TRIANGLE VA
2014-05-16 571-317-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2014-05-15 571-317-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2014-05-15 571-398-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 OCCOQUAN VA
2014-05-15 571-781-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NOKESVILLE VA
2014-05-14 571-317-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2014-05-14 571-317-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2014-05-06 571-620-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E WSNGTNZN17 VA
2014-05-05 571-248-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HAYMARKET VA
2014-05-05 571-336-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ENGLESIDE 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.