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
2016-09-07 571-525-9XXX 9000–9999Assigned NUSO, LLC 551G HERNDON VA
2016-09-07 571-549-5XXX 5000–5999Assigned NUSO, LLC 551G BRADDOCK VA
2016-09-07 571-639-0XXX 0000–0999Assigned NUSO, LLC 551G ARCOLA VA
2016-09-01 571-336-4XXX 4000–4999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2016-08-26 571-565-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2016-08-24 571-373-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2016-08-23 571-719-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2016-08-23 571-888-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DULLES VA
2016-08-19 571-373-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2016-08-19 571-799-0XXX 0000–0999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G LEESBURG VA
2016-08-18 571-348-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LORTON VA
2016-08-18 571-399-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 INDENDNTHL VA
2016-08-16 571-525-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2016-08-16 571-525-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2016-08-16 571-565-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2016-08-16 571-565-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2016-08-16 571-635-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2016-08-11 571-525-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2016-08-09 571-635-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2016-08-09 571-635-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2016-08-08 571-352-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2016-08-08 571-352-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2016-08-08 571-778-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2016-08-05 571-444-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2016-08-05 571-457-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2016-08-05 571-457-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2016-08-05 571-457-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2016-08-01 571-352-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2016-08-01 571-352-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2016-08-01 571-549-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRADDOCK VA
2016-08-01 571-775-4XXX 4000–4999Assigned NUSO, LLC 551G WSNGTNZN08 VA
2016-08-01 571-775-6XXX 6000–6999Assigned NUSO, LLC 551G WSNGTNZN08 VA
2016-08-01 571-775-7XXX 7000–7999Assigned NUSO, LLC 551G WSNGTNZN08 VA
2016-08-01 571-800-4XXX 4000–4999Assigned NUSO, LLC 551G WSNGTNZN08 VA
2016-08-01 571-800-5XXX 5000–5999Assigned NUSO, LLC 551G WSNGTNZN08 VA
2016-07-22 571-919-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2016-07-19 571-320-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F TRIANGLE VA
2016-07-19 571-349-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2016-07-19 571-363-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2016-07-19 571-486-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HAYMARKET VA
2016-07-19 571-549-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F BRADDOCK VA
2016-07-19 571-549-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F BRADDOCK VA
2016-07-13 571-260-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DALE CITY VA
2016-07-13 571-260-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DALE CITY VA
2016-07-13 571-320-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TRIANGLE VA
2016-07-13 571-373-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2016-07-13 571-585-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2016-07-13 571-639-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ARCOLA VA
2016-07-12 571-457-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2016-07-12 571-549-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E BRADDOCK 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.