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
2012-06-25 571-581-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2012-06-25 571-612-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2012-06-25 571-733-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2012-06-25 571-733-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2012-06-25 571-733-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2012-06-22 571-389-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2012-06-22 571-389-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2012-06-22 571-428-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2012-06-19 571-267-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2012-06-14 571-375-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2012-06-12 571-428-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MANASSAS VA
2012-06-01 571-206-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2012-06-01 571-406-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 TRIANGLE VA
2012-06-01 571-492-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2012-05-31 571-389-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2012-05-31 571-989-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DALE CITY VA
2012-05-24 571-383-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2012-05-17 571-336-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ENGLESIDE VA
2012-05-17 571-399-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F INDENDNTHL VA
2012-05-15 571-210-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2012-05-01 571-367-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J ARCOLA VA
2012-04-24 571-581-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN17 VA
2012-04-18 571-328-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN19 VA
2012-04-18 571-441-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2012-04-16 571-399-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J INDENDNTHL VA
2012-04-09 571-428-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2012-04-04 571-423-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2012-04-02 571-383-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2012-04-02 571-383-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2012-04-02 571-383-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2012-04-02 571-385-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2012-04-02 571-385-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2012-04-02 571-385-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2012-04-02 571-385-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2012-04-02 571-385-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2012-04-02 571-419-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2012-04-02 571-835-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2012-04-02 571-835-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2012-03-28 571-447-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2012-03-21 571-835-7XXX 7000–7999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN17 VA
2012-03-14 571-512-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN19 VA
2012-03-14 571-512-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN19 VA
2012-03-14 571-733-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2012-03-07 571-441-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2012-03-07 571-445-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HAYMARKET VA
2012-02-13 571-298-9XXX 9000–9999Assigned METROPCS, INC. 5562 DALE CITY VA
2012-02-08 571-222-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HAYMARKET VA
2012-02-08 571-388-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2012-02-08 571-577-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2012-02-07 571-989-8XXX 8000–8999Assigned METROPCS, INC. 5562 DALE CITY 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.