NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

43 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2008-04-09 571-468-9XXX 9000–9999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN17 VA
2008-04-04 571-303-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2008-04-04 571-766-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN17 VA
2008-04-03 571-297-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2008-04-03 571-931-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F TRIANGLE VA
2008-04-03 571-991-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DALE CITY VA
2008-04-02 571-299-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2008-04-02 571-315-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2008-04-02 571-315-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2008-04-02 571-315-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2008-03-28 571-299-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J HERNDON VA
2008-03-28 571-299-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J HERNDON VA
2008-03-19 571-483-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2008-03-19 571-483-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2008-03-14 571-313-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2008-03-14 571-384-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2008-03-07 571-374-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E INDENDNTHL VA
2008-03-07 571-765-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2008-03-07 571-765-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2008-03-07 571-918-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2008-02-29 571-933-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E DULLESMTRO VA
2008-02-29 571-934-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E DULLES VA
2008-02-29 571-934-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. OF VIRGINIA - VA 367E DULLES VA
2008-02-15 571-248-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J HAYMARKET VA
2008-02-13 571-483-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2008-02-13 571-970-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2008-02-13 571-970-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2008-02-08 571-403-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2008-02-06 571-229-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2008-02-06 571-289-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2008-02-06 571-289-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2008-02-06 571-329-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2008-02-06 571-329-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2008-02-06 571-329-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2008-02-06 571-329-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2008-02-05 571-308-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2008-02-05 571-350-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN19 VA
2008-02-05 571-350-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN19 VA
2008-02-05 571-350-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN19 VA
2008-02-05 571-918-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2008-02-05 571-918-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2008-02-04 571-350-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2008-02-04 571-350-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2008-02-04 571-918-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEESBURG VA
2008-01-31 571-350-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN19 VA
2008-01-31 571-350-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN19 VA
2008-01-31 571-350-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN19 VA
2008-01-31 571-350-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN19 VA
2008-01-25 571-366-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2008-01-25 571-366-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.