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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2013-08-14 571-302-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2013-08-14 571-302-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2013-08-14 571-359-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2013-08-14 571-364-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2013-08-14 571-386-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2013-08-14 571-386-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2013-08-14 571-386-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2013-08-14 571-835-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2013-08-14 571-835-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2013-08-14 571-982-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2013-08-08 571-206-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2013-08-08 571-210-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2013-08-06 571-374-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J INDENDNTHL VA
2013-08-06 571-428-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MANASSAS VA
2013-08-06 571-526-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HERNDON VA
2013-08-02 571-526-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2013-08-02 571-551-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2013-08-02 571-551-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2013-08-02 571-551-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2013-08-02 571-620-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2013-08-02 571-620-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2013-07-30 571-326-0XXX 0000–0999Assigned IP HORIZON LLC 515J WSNGTNZN17 VA
2013-07-30 571-492-0XXX 0000–0999Assigned IP HORIZON LLC 515J OCCOQUAN VA
2013-07-30 571-551-0XXX 0000–0999Assigned IP HORIZON LLC 515J WSNGTNZN08 VA
2013-07-17 571-253-0XXX 0000–0999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2013-07-17 571-253-9XXX 9000–9999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2013-07-17 571-348-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LORTON VA
2013-07-17 571-364-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2013-07-17 571-386-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2013-07-17 571-581-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2013-07-17 571-758-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DULLES VA
2013-07-16 571-359-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MANASSAS VA
2013-07-16 571-398-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J OCCOQUAN VA
2013-07-11 571-465-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2013-07-02 571-206-9XXX 9000–9999Assigned METROPCS, INC. 5562 LEESBURG VA
2013-07-02 571-465-8XXX 8000–8999Assigned METROPCS, INC. 5562 LEESBURG VA
2013-07-02 571-758-1XXX 1000–1999Assigned METROPCS, INC. 5562 DULLES VA
2013-07-02 571-835-1XXX 1000–1999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2013-07-02 571-835-2XXX 2000–2999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2013-07-02 571-835-3XXX 3000–3999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2013-06-26 571-406-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 TRIANGLE VA
2013-06-26 571-581-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2013-06-17 571-375-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2013-06-06 571-526-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J HERNDON VA
2013-06-06 571-526-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J HERNDON VA
2013-06-05 571-398-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J OCCOQUAN VA
2013-06-05 571-733-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2013-06-05 571-733-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2013-05-31 571-398-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2013-05-31 571-398-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN 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.