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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2011-06-06 571-447-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2011-06-06 571-512-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2011-06-06 571-512-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2011-06-01 571-222-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HAYMARKET VA
2011-05-27 571-306-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2011-05-25 571-306-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2011-05-25 571-306-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2011-05-25 571-346-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2011-05-25 571-447-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2011-05-25 571-447-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2011-05-25 571-553-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2011-05-25 571-553-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2011-05-25 571-553-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2011-05-25 571-553-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2011-05-25 571-553-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2011-05-25 571-553-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2011-05-25 571-553-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2011-05-25 571-553-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2011-05-25 571-553-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2011-05-25 571-553-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2011-05-19 571-488-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2011-05-19 571-488-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2011-05-18 571-266-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2011-05-18 571-266-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2011-05-16 571-447-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2011-05-11 571-388-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2011-05-11 571-388-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2011-05-10 571-419-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2011-05-10 571-455-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2011-05-05 571-535-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MANASSAS VA
2011-04-29 571-442-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEESBURG VA
2011-04-27 571-306-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2011-04-27 571-421-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2011-04-27 571-814-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2011-04-27 571-814-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2011-04-27 571-858-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2011-04-27 571-858-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2011-04-27 571-858-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2011-04-27 571-858-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2011-04-20 571-305-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2011-04-20 571-305-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2011-04-20 571-429-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2011-04-20 571-429-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2011-04-20 571-429-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2011-04-20 571-429-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2011-04-20 571-429-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2011-04-20 571-429-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2011-04-20 571-429-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2011-04-20 571-482-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2011-04-20 571-533-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN17 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.