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
2005-12-28 571-451-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2005-12-28 571-451-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2005-12-28 571-451-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-12-28 571-451-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-12-28 571-451-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-12-28 571-451-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-12-22 571-248-6XXX 6000–6999Assigned VERIZON SOUTH, INC. - VA (CONTEL) 0233 HAYMARKET VA
2005-11-14 571-229-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2005-11-10 571-438-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-11-10 571-438-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-11-10 571-451-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-11-10 571-451-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-11-01 571-209-6XXX 6000–6999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2005-10-28 571-209-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2005-09-30 571-209-4XXX 4000–4999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2005-09-02 571-641-7XXX 7000–7999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2005-08-26 571-209-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 LEESBURG VA
2005-08-18 571-229-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MANASSAS VA
2005-08-16 571-229-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2005-08-08 571-271-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2005-07-22 571-252-0XXX 0000–0999Assigned METROPCS, INC. 5562 LEESBURG VA
2005-07-21 571-431-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN08 VA
2005-07-20 571-265-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2005-07-13 571-435-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J WSNGTNZN19 VA
2005-06-29 571-223-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2005-06-29 571-223-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2005-06-27 571-224-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J WSNGTNZN19 VA
2005-06-20 571-451-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2005-06-09 571-201-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2005-06-08 571-209-0XXX 0000–0999Assigned METROPCS, INC. 5562 LEESBURG VA
2005-06-08 571-258-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEESBURG VA
2005-06-08 571-345-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-06-08 571-438-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-06-08 571-438-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-06-08 571-438-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-06-01 571-291-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2005-05-31 571-382-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2005-05-12 571-201-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2005-05-12 571-201-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2005-05-10 571-222-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J HAYMARKET VA
2005-05-02 571-234-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2005-05-02 571-234-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2005-04-26 571-252-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2005-04-18 571-642-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 ENGLESIDE VA
2005-04-14 571-234-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2005-04-04 571-748-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN19 VA
2005-04-04 571-748-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN19 VA
2005-03-30 571-292-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J MANASSAS VA
2005-03-30 571-292-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J MANASSAS VA
2005-03-22 571-252-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG 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.