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
2010-05-10 571-422-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2010-05-10 571-422-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2010-05-10 571-455-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2010-05-07 571-393-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2010-05-07 571-439-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2010-05-07 571-969-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2010-05-07 571-969-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2010-05-04 571-318-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J WSNGTNZN19 VA
2010-05-03 571-231-0XXX 0000–0999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-05-03 571-231-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-05-03 571-231-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-05-03 571-231-3XXX 3000–3999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-05-03 571-231-4XXX 4000–4999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-05-03 571-231-5XXX 5000–5999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-05-03 571-231-6XXX 6000–6999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-05-03 571-231-7XXX 7000–7999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-05-03 571-231-8XXX 8000–8999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-05-03 571-231-9XXX 9000–9999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-04-20 571-577-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2010-04-15 571-502-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-04-15 571-502-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-04-15 571-502-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-04-15 571-502-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-04-12 571-346-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J HERNDON VA
2010-04-07 571-308-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E WSNGTNZN19 VA
2010-04-07 571-393-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2010-04-07 571-422-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2010-03-31 571-422-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-03-31 571-425-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-03-31 571-425-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-03-31 571-425-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-03-31 571-425-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-03-31 571-425-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-03-24 571-483-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2010-03-10 571-405-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2010-03-10 571-449-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2010-03-08 571-425-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E WSNGTNZN17 VA
2010-03-03 571-293-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2010-03-03 571-357-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2010-03-03 571-357-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2010-03-02 571-485-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2010-03-02 571-485-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2010-02-26 571-425-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-02-26 571-425-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2010-02-18 571-409-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 OCCOQUAN VA
2010-02-16 571-306-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2010-02-16 571-306-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2010-02-16 571-306-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2010-02-16 571-306-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2010-02-16 571-445-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HAYMARKET 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.