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
2021-03-10 571-773-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E DULLESMTRO VA
2021-03-10 571-773-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E DULLESMTRO VA
2021-03-10 571-773-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E DULLESMTRO VA
2021-03-10 571-773-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E DULLESMTRO VA
2021-03-10 571-773-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E DULLESMTRO VA
2021-03-09 571-479-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2021-03-09 571-479-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2021-03-09 571-532-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2021-03-09 571-532-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2021-03-05 571-503-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F OCCOQUAN VA
2021-03-04 571-479-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E LEESBURG VA
2021-03-04 571-479-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E LEESBURG VA
2021-03-04 571-479-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E LEESBURG VA
2021-03-04 571-479-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E LEESBURG VA
2021-03-04 571-556-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E BRADDOCK VA
2021-03-04 571-556-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E BRADDOCK VA
2021-03-04 571-556-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E BRADDOCK VA
2021-03-04 571-556-8XXX 8000–8999Assigned ONVOY, LLC - VA 138E BRADDOCK VA
2021-03-04 571-556-9XXX 9000–9999Assigned ONVOY, LLC - VA 138E BRADDOCK VA
2021-03-03 571-532-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2021-03-03 571-532-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2021-03-03 571-532-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2021-03-01 571-519-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2021-03-01 571-519-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2021-03-01 571-519-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2021-02-28 571-532-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MANASSAS VA
2021-02-26 571-416-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2021-02-26 571-479-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2021-02-26 571-479-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2021-02-26 571-479-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2021-02-26 571-774-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 TRIANGLE VA
2021-02-23 571-517-0XXX 0000–0999Assigned TELNYX LLC 073H DULLES VA
2021-02-23 571-519-0XXX 0000–0999Assigned TELNYX LLC 073H HERNDON VA
2021-02-12 571-473-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2021-02-11 571-531-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2021-02-11 571-531-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2021-02-11 571-531-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2021-02-11 571-837-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J LEESBURG VA
2021-02-09 571-774-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E TRIANGLE VA
2021-02-09 571-774-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E TRIANGLE VA
2021-02-09 571-774-6XXX 6000–6999Assigned ONVOY, LLC - VA 138E TRIANGLE VA
2021-02-09 571-774-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E TRIANGLE VA
2021-02-08 571-668-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2021-02-08 571-710-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H LORTON VA
2021-02-08 571-710-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H LORTON VA
2021-02-08 571-710-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H LORTON VA
2021-02-08 571-710-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H LORTON VA
2021-02-08 571-710-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H LORTON VA
2021-02-08 571-710-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H LORTON VA
2021-02-08 571-710-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H LORTON 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.