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
2013-05-29 571-758-0XXX 0000–0999Assigned METROPCS, INC. 5562 DULLES VA
2013-05-29 571-758-9XXX 9000–9999Assigned METROPCS, INC. 5562 DULLES VA
2013-05-22 571-445-1XXX 1000–1999Assigned METROPCS, INC. 5562 HAYMARKET VA
2013-05-22 571-494-2XXX 2000–2999Assigned METROPCS, INC. 5562 TRIANGLE VA
2013-05-22 571-620-4XXX 4000–4999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2013-05-21 571-302-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2013-05-21 571-458-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2013-05-20 571-551-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2013-05-20 571-551-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2013-05-16 571-386-5XXX 5000–5999Assigned IP HORIZON LLC 515J WSNGTNZN19 VA
2013-05-16 571-428-0XXX 0000–0999Assigned IP HORIZON LLC 515J MANASSAS VA
2013-05-16 571-526-5XXX 5000–5999Assigned IP HORIZON LLC 515J HERNDON VA
2013-05-15 571-699-1XXX 1000–1999Assigned NUSO, LLC 551G WSNGTNZN08 VA
2013-05-14 571-367-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 ARCOLA VA
2013-05-13 571-448-1XXX 1000–1999Assigned IP HORIZON LLC 515J ENGLESIDE VA
2013-05-01 571-353-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2013-05-01 571-386-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2013-04-22 571-302-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2013-04-17 571-458-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2013-04-08 571-298-8XXX 8000–8999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DALE CITY VA
2013-04-08 571-302-8XXX 8000–8999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G WSNGTNZN08 VA
2013-04-08 571-302-9XXX 9000–9999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G WSNGTNZN08 VA
2013-04-08 571-348-1XXX 1000–1999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G LORTON VA
2013-04-08 571-348-9XXX 9000–9999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G LORTON VA
2013-04-08 571-367-0XXX 0000–0999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G ARCOLA VA
2013-04-08 571-367-1XXX 1000–1999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G ARCOLA VA
2013-04-08 571-374-8XXX 8000–8999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G INDENDNTHL VA
2013-04-08 571-399-9XXX 9000–9999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G INDENDNTHL VA
2013-04-08 571-445-8XXX 8000–8999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G HAYMARKET VA
2013-04-08 571-445-9XXX 9000–9999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G HAYMARKET VA
2013-04-08 571-492-9XXX 9000–9999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G OCCOQUAN VA
2013-04-08 571-575-8XXX 8000–8999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G OCCOQUAN VA
2013-04-08 571-781-1XXX 1000–1999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G NOKESVILLE VA
2013-04-08 571-781-8XXX 8000–8999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G NOKESVILLE VA
2013-04-08 571-932-8XXX 8000–8999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G LORTONMTRO VA
2013-04-08 571-989-9XXX 9000–9999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DALE CITY VA
2013-04-04 571-398-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J OCCOQUAN VA
2013-03-20 571-458-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2013-03-20 571-458-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2013-03-14 571-302-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2013-03-06 571-458-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2013-02-28 571-364-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MANASSAS VA
2013-02-26 571-302-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2013-02-12 571-364-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2013-01-28 571-364-0XXX 0000–0999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G MANASSAS VA
2013-01-28 571-386-0XXX 0000–0999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G WSNGTNZN19 VA
2013-01-23 571-348-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LORTON VA
2013-01-22 571-326-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN17 VA
2013-01-22 571-326-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN17 VA
2013-01-22 571-620-0XXX 0000–0999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G WSNGTNZN17 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.