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
2022-01-26 571-538-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2022-01-26 571-538-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2022-01-26 571-538-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2022-01-19 571-516-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E TRIANGLE VA
2022-01-19 571-545-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E WSNGTNZN17 VA
2022-01-19 571-587-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E WSNGTNZN19 VA
2022-01-19 571-622-0XXX 0000–0999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2022-01-19 571-622-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2022-01-18 571-755-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E HAYMARKET VA
2022-01-18 571-755-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E HAYMARKET VA
2022-01-18 571-866-9XXX 9000–9999Assigned ONVOY, LLC - VA 138E OCCOQUAN VA
2022-01-14 571-538-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2022-01-14 571-538-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2022-01-14 571-538-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2022-01-14 571-538-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2022-01-14 571-541-9XXX 9000–9999Assigned ONVOY, LLC - VA 138E LEESBURG VA
2022-01-14 571-622-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H WSNGTNZN08 VA
2022-01-14 571-622-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H WSNGTNZN08 VA
2022-01-14 571-837-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E LEESBURG VA
2022-01-14 571-837-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E LEESBURG VA
2022-01-10 571-543-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2022-01-10 571-543-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2022-01-10 571-543-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2022-01-10 571-543-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2022-01-10 571-543-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2022-01-07 571-534-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F OCCOQUAN VA
2022-01-07 571-534-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F OCCOQUAN VA
2022-01-07 571-686-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H BRADDOCK VA
2022-01-04 571-622-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2021-12-22 571-516-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H TRIANGLE VA
2021-12-22 571-516-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H TRIANGLE VA
2021-12-21 571-504-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H ENGLESIDE VA
2021-12-21 571-504-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H ENGLESIDE VA
2021-12-21 571-541-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2021-12-15 571-587-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2021-12-15 571-587-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2021-12-15 571-587-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2021-12-15 571-685-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2021-12-15 571-910-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2021-12-14 571-516-2XXX 2000–2999Assigned METROPCS, INC. 5562 TRIANGLE VA
2021-12-14 571-686-3XXX 3000–3999Assigned METROPCS, INC. 5562 BRADDOCK VA
2021-12-14 571-686-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BRADDOCK VA
2021-12-08 571-531-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2021-12-08 571-531-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2021-12-08 571-531-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2021-12-08 571-531-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2021-12-08 571-531-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2021-12-07 571-478-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2021-12-07 571-478-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2021-12-07 571-478-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 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.