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
2021-07-08 571-910-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2021-07-08 571-910-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2021-07-02 571-410-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2021-07-02 571-498-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2021-07-02 571-573-9XXX 9000–9999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G NOKESVILLE VA
2021-07-02 571-667-9XXX 9000–9999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G LORTON VA
2021-07-02 571-910-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2021-07-02 571-910-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2021-07-02 571-910-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2021-07-02 571-910-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2021-06-30 571-473-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2021-06-30 571-473-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2021-06-30 571-771-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2021-06-30 571-866-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2021-06-30 571-866-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2021-06-30 571-866-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2021-06-30 571-895-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2021-06-30 571-895-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2021-06-29 571-934-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E DULLES VA
2021-06-23 571-328-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2021-06-23 571-532-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2021-06-23 571-544-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2021-06-23 571-619-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2021-06-21 571-307-9XXX 9000–9999Assigned TELNYX LLC 073H WSNGTNZN19 VA
2021-06-21 571-837-5XXX 5000–5999Assigned COMMIO, LLC 939H LEESBURG VA
2021-06-21 571-837-7XXX 7000–7999Assigned COMMIO, LLC 939H LEESBURG VA
2021-06-21 571-837-9XXX 9000–9999Assigned COMMIO, LLC 939H LEESBURG VA
2021-06-10 571-307-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2021-06-10 571-307-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2021-06-10 571-307-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2021-06-10 571-307-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2021-06-10 571-307-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2021-06-10 571-513-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2021-06-10 571-513-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2021-06-10 571-513-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2021-06-10 571-513-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2021-06-10 571-513-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2021-06-10 571-668-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2021-06-04 571-507-0XXX 0000–0999Assigned COMMIO, LLC 939H WSNGTNZN17 VA
2021-06-04 571-507-1XXX 1000–1999Assigned COMMIO, LLC 939H WSNGTNZN17 VA
2021-06-04 571-507-8XXX 8000–8999Assigned COMMIO, LLC 939H WSNGTNZN17 VA
2021-06-04 571-507-9XXX 9000–9999Assigned COMMIO, LLC 939H WSNGTNZN17 VA
2021-06-04 571-686-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E BRADDOCK VA
2021-06-04 571-686-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E BRADDOCK VA
2021-06-04 571-686-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E BRADDOCK VA
2021-06-04 571-686-8XXX 8000–8999Assigned ONVOY, LLC - VA 138E BRADDOCK VA
2021-05-29 571-837-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 LEESBURG VA
2021-05-21 571-837-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2021-05-18 571-866-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 OCCOQUAN VA
2021-05-08 571-307-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 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.