NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

41 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
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2014-05-05 571-620-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2014-05-05 571-758-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DULLES VA
2014-04-30 571-551-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2014-04-24 571-458-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2014-04-23 571-317-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2014-04-23 571-982-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2014-04-18 571-290-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2014-04-18 571-298-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DALE CITY VA
2014-04-16 571-919-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2014-04-14 571-284-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAYMARKET VA
2014-04-14 571-284-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAYMARKET VA
2014-04-14 571-284-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAYMARKET VA
2014-04-14 571-510-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 LEESBURG VA
2014-04-11 571-325-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2014-04-11 571-325-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2014-04-11 571-445-2XXX 2000–2999Assigned METROPCS, INC. 5562 HAYMARKET VA
2014-04-11 571-510-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LEESBURG VA
2014-04-11 571-581-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2014-04-10 571-325-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2014-04-10 571-982-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2014-03-31 571-494-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 TRIANGLE VA
2014-03-21 571-325-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2014-03-19 571-317-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2014-03-19 571-325-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E HERNDON VA
2014-03-19 571-375-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2014-03-14 571-279-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2014-03-14 571-279-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2014-03-14 571-279-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2014-03-11 571-317-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2014-03-06 571-458-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2014-03-04 571-298-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DALE CITY VA
2014-03-04 571-343-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OCCOQUAN VA
2014-03-04 571-348-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LORTON VA
2014-02-26 571-210-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2014-02-26 571-406-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F TRIANGLE VA
2014-02-26 571-550-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2014-02-26 571-781-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F NOKESVILLE VA
2014-02-24 571-279-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2014-02-24 571-279-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2014-02-24 571-325-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2014-02-24 571-325-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2014-02-20 571-364-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2014-02-18 571-375-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2014-02-03 571-279-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2014-02-03 571-317-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2014-02-03 571-325-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2014-02-03 571-758-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DULLES VA
2014-01-29 571-325-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2014-01-29 571-528-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2014-01-28 571-304-0XXX 0000–0999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON 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.