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
2019-04-17 571-394-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TRIANGLE VA
2019-04-11 571-370-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2019-04-10 571-380-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LORTON VA
2019-04-10 571-440-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2019-04-10 571-491-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DULLES VA
2019-04-09 571-404-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F BRADDOCK VA
2019-04-01 571-697-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TRIANGLE VA
2019-04-01 571-697-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TRIANGLE VA
2019-03-29 571-833-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MANASSAS VA
2019-03-29 571-833-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MANASSAS VA
2019-03-20 571-412-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2019-03-19 571-491-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DULLES VA
2019-03-18 571-400-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J WSNGTNZN08 VA
2019-03-18 571-440-9XXX 9000–9999Assigned METROPCS, INC. 5562 LEESBURG VA
2019-03-14 571-842-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2019-03-12 571-536-3XXX 3000–3999Assigned CORETEL VIRGINIA, LLC - VA 5832 WSNGTNZN19 VA
2019-03-12 571-697-6XXX 6000–6999Assigned CORETEL VIRGINIA, LLC - VA 5832 TRIANGLE VA
2019-03-12 571-842-5XXX 5000–5999Assigned CORETEL VIRGINIA, LLC - VA 5832 WSNGTNZN08 VA
2019-03-05 571-347-4XXX 4000–4999Assigned CORETEL VIRGINIA, LLC - VA 5832 WSNGTNZN08 VA
2019-03-05 571-347-5XXX 5000–5999Assigned CORETEL VIRGINIA, LLC - VA 5832 WSNGTNZN08 VA
2019-03-05 571-347-6XXX 6000–6999Assigned CORETEL VIRGINIA, LLC - VA 5832 WSNGTNZN08 VA
2019-03-04 571-336-3XXX 3000–3999Assigned CORETEL VIRGINIA, LLC - VA 5832 ENGLESIDE VA
2019-03-04 571-336-9XXX 9000–9999Assigned CORETEL VIRGINIA, LLC - VA 5832 ENGLESIDE VA
2019-03-04 571-642-8XXX 8000–8999Assigned CORETEL VIRGINIA, LLC - VA 5832 ENGLESIDE VA
2019-03-01 571-360-9XXX 9000–9999Assigned CORETEL VIRGINIA, LLC - VA 5832 INDENDNTHL VA
2019-02-27 571-619-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2019-02-27 571-752-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J HERNDON VA
2019-02-15 571-559-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ENGLESIDE VA
2019-02-15 571-559-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ENGLESIDE VA
2019-02-15 571-559-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ENGLESIDE VA
2019-02-15 571-559-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ENGLESIDE VA
2019-02-15 571-559-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ENGLESIDE VA
2019-02-14 571-634-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2019-02-14 571-634-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2019-02-14 571-666-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2019-02-14 571-666-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2019-02-14 571-669-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2019-02-14 571-669-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2019-02-14 571-669-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2019-02-14 571-669-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2019-02-12 571-347-1XXX 1000–1999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G WSNGTNZN08 VA
2019-02-12 571-360-3XXX 3000–3999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G INDENDNTHL VA
2019-02-12 571-401-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HERNDON VA
2019-02-12 571-407-9XXX 9000–9999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G WSNGTNZN19 VA
2019-02-12 571-412-5XXX 5000–5999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G OCCOQUAN VA
2019-02-12 571-634-3XXX 3000–3999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G WSNGTNZN17 VA
2019-02-11 571-390-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F NOKESVILLE VA
2019-02-11 571-390-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F NOKESVILLE VA
2019-02-11 571-390-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F NOKESVILLE VA
2019-02-11 571-390-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F NOKESVILLE 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.