NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

41 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2018-11-07 571-397-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2018-11-07 571-397-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2018-11-07 571-417-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D LEESBURG VA
2018-11-07 571-417-7XXX 7000–7999Assigned VONAGE AMERICA LLC 197D LEESBURG VA
2018-11-07 571-509-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D LEESBURG VA
2018-11-07 571-509-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D LEESBURG VA
2018-11-07 571-509-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D LEESBURG VA
2018-11-07 571-509-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D LEESBURG VA
2018-11-07 571-509-5XXX 5000–5999Assigned VONAGE AMERICA LLC 197D LEESBURG VA
2018-11-07 571-509-6XXX 6000–6999Assigned VONAGE AMERICA LLC 197D LEESBURG VA
2018-11-07 571-509-7XXX 7000–7999Assigned VONAGE AMERICA LLC 197D LEESBURG VA
2018-11-07 571-685-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2018-11-01 571-417-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2018-11-01 571-867-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2018-10-30 571-260-6XXX 6000–6999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DALE CITY VA
2018-10-30 571-370-4XXX 4000–4999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G ARCOLA VA
2018-10-30 571-380-4XXX 4000–4999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G LORTON VA
2018-10-30 571-394-2XXX 2000–2999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G TRIANGLE VA
2018-10-30 571-486-2XXX 2000–2999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G HAYMARKET VA
2018-10-04 571-685-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2018-10-03 571-752-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2018-09-27 571-397-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2018-09-27 571-397-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2018-09-27 571-634-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2018-09-27 571-685-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2018-09-25 571-396-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2018-09-24 571-404-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRADDOCK VA
2018-09-24 571-655-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRADDOCK VA
2018-09-19 571-380-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LORTON VA
2018-09-19 571-408-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F OCCOQUAN VA
2018-09-19 571-666-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2018-09-14 571-666-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2018-09-14 571-666-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2018-09-13 571-831-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 LEESBURG VA
2018-09-11 571-595-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2018-09-10 571-370-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2018-09-07 571-495-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2018-08-29 571-500-0XXX 0000–0999Assigned ONVOY, LLC - VA 138E HERNDON VA
2018-08-29 571-500-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E HERNDON VA
2018-08-29 571-500-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E HERNDON VA
2018-08-29 571-500-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E HERNDON VA
2018-08-29 571-500-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E HERNDON VA
2018-08-29 571-500-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E HERNDON VA
2018-08-29 571-500-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E HERNDON VA
2018-08-29 571-500-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E HERNDON VA
2018-08-29 571-500-8XXX 8000–8999Assigned ONVOY, LLC - VA 138E HERNDON VA
2018-08-29 571-500-9XXX 9000–9999Assigned ONVOY, LLC - VA 138E HERNDON VA
2018-08-21 571-394-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 TRIANGLE VA
2018-08-21 571-427-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2018-08-21 571-523-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.