NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

43 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
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
2023-05-05 571-638-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2023-04-26 571-637-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2023-04-26 571-637-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2023-04-21 571-504-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ENGLESIDE VA
2023-04-20 571-618-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-04-20 571-618-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-04-20 571-618-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-04-20 571-618-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-04-20 571-618-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-04-20 571-618-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-04-20 571-618-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-04-18 571-506-0XXX 0000–0999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2023-04-18 571-506-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2023-04-18 571-506-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2023-04-18 571-506-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2023-04-18 571-506-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2023-04-18 571-506-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2023-04-18 571-592-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E OCCOQUAN VA
2023-04-18 571-593-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E LEESBURG VA
2023-04-17 571-646-0XXX 0000–0999Assigned TELNYX LLC 073H ENGLESIDE VA
2023-04-07 571-573-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J NOKESVILLE VA
2023-03-24 571-597-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2023-03-24 571-603-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2023-03-22 571-583-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E BRADDOCK VA
2023-03-22 571-604-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E WSNGTNZN19 VA
2023-03-22 571-604-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E WSNGTNZN19 VA
2023-03-22 571-605-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E DALE CITY VA
2023-03-21 571-504-3XXX 3000–3999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2023-03-16 571-596-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-03-16 571-596-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-03-16 571-603-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-03-16 571-603-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-03-16 571-603-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2023-03-15 571-773-0XXX 0000–0999Assigned TELNYX LLC 073H DULLESMTRO VA
2023-03-02 571-742-0XXX 0000–0999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DULLESMTRO VA
2023-03-02 571-742-1XXX 1000–1999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DULLESMTRO VA
2023-03-02 571-742-2XXX 2000–2999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DULLESMTRO VA
2023-03-02 571-742-3XXX 3000–3999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DULLESMTRO VA
2023-03-02 571-742-4XXX 4000–4999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DULLESMTRO VA
2023-03-02 571-742-5XXX 5000–5999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DULLESMTRO VA
2023-03-02 571-742-7XXX 7000–7999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DULLESMTRO VA
2023-02-22 571-751-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 ARCOLA VA
2023-02-21 571-506-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2023-02-21 571-506-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2023-02-21 571-506-8XXX 8000–8999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2023-02-16 571-593-0XXX 0000–0999Assigned TELNYX LLC 073H LEESBURG VA
2023-02-15 571-603-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E WSNGTNZN17 VA
2023-02-15 571-603-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E WSNGTNZN17 VA
2023-02-13 571-617-1XXX 1000–1999Assigned NUSO, LLC 732J LEESBURG VA
2023-02-10 571-603-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J 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.