NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

43 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2007-08-01 571-839-5XXX 5000–5999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-08-01 571-839-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2007-08-01 571-839-7XXX 7000–7999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-08-01 571-839-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-08-01 571-839-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2007-07-31 571-830-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WSNGTNZN17 VA
2007-07-31 571-830-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J WSNGTNZN17 VA
2007-07-30 571-285-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2007-07-30 571-918-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LEESBURG VA
2007-07-24 571-223-8XXX 8000–8999Assigned METROPCS, INC. 5562 LEESBURG VA
2007-07-24 571-223-9XXX 9000–9999Assigned METROPCS, INC. 5562 LEESBURG VA
2007-07-24 571-258-7XXX 7000–7999Assigned METROPCS, INC. 5562 LEESBURG VA
2007-07-19 571-282-1XXX 1000–1999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-07-19 571-282-7XXX 7000–7999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-07-19 571-282-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-07-19 571-282-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2007-07-19 571-830-5XXX 5000–5999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-07-19 571-830-7XXX 7000–7999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-07-19 571-830-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-07-09 571-366-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2007-07-09 571-366-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2007-07-06 571-289-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-07-06 571-970-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-07-05 571-257-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2007-06-26 571-282-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2007-06-19 571-931-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J TRIANGLE VA
2007-06-14 571-926-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2007-06-13 571-261-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J HAYMARKET VA
2007-06-12 571-282-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2007-06-12 571-282-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2007-06-06 571-289-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-06-06 571-289-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-06-06 571-289-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-06-06 571-289-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-06-06 571-926-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2007-05-30 571-490-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2007-05-23 571-480-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E WSNGTNZN08 VA
2007-05-23 571-480-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E WSNGTNZN08 VA
2007-05-23 571-481-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E WSNGTNZN08 VA
2007-05-23 571-481-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E WSNGTNZN08 VA
2007-05-23 571-483-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E WSNGTNZN08 VA
2007-05-23 571-483-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E WSNGTNZN08 VA
2007-05-23 571-522-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E BRADDOCK VA
2007-05-23 571-522-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E BRADDOCK VA
2007-05-23 571-522-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E BRADDOCK VA
2007-05-23 571-522-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E BRADDOCK VA
2007-05-23 571-522-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E BRADDOCK VA
2007-05-23 571-522-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E BRADDOCK VA
2007-05-23 571-970-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E WSNGTNZN08 VA
2007-05-14 571-285-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DALE CITY VA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.