NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

41 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2018-06-15 571-651-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2018-06-12 571-523-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2018-06-12 571-523-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2018-06-12 571-523-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2018-06-08 571-391-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2018-06-08 571-391-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2018-06-08 571-391-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2018-06-08 571-391-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2018-06-08 571-391-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2018-06-08 571-391-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2018-06-08 571-391-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2018-06-08 571-391-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2018-06-08 571-391-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2018-06-08 571-391-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2018-06-06 571-662-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2018-06-06 571-662-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2018-06-06 571-800-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2018-06-04 571-387-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2018-06-04 571-387-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2018-06-04 571-387-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2018-06-04 571-387-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2018-06-04 571-387-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2018-05-31 571-347-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2018-05-21 571-867-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2018-05-21 571-932-7XXX 7000–7999Assigned CORETEL VIRGINIA, LLC - VA 5832 LORTONMTRO VA
2018-05-17 571-324-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2018-05-17 571-339-0XXX 0000–0999Assigned ONVOY, LLC - VA 138E ENGLESIDE VA
2018-05-17 571-417-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEESBURG VA
2018-05-17 571-595-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E WSNGTNZN19 VA
2018-05-10 571-595-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2018-05-09 571-660-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E TRIANGLE VA
2018-05-09 571-660-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TRIANGLE VA
2018-05-09 571-662-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2018-05-09 571-662-5XXX 5000–5999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2018-05-08 571-427-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E OCCOQUAN VA
2018-05-08 571-443-8XXX 8000–8999Assigned ONVOY, LLC - VA 138E HERNDON VA
2018-05-08 571-486-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E HAYMARKET VA
2018-05-02 571-324-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2018-05-02 571-616-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ENGLESIDE VA
2018-04-27 571-369-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2018-04-27 571-752-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2018-04-27 571-752-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2018-04-13 571-649-0XXX 0000–0999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-3XXX 3000–3999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-4XXX 4000–4999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-5XXX 5000–5999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-6XXX 6000–6999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-7XXX 7000–7999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.