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
2008-01-22 571-252-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2008-01-22 571-374-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 INDENDNTHL VA
2008-01-22 571-934-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DULLES VA
2008-01-17 571-379-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J MANASSAS VA
2008-01-17 571-379-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MANASSAS VA
2008-01-17 571-918-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEESBURG VA
2008-01-07 571-291-6XXX 6000–6999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2007-12-14 571-991-0XXX 0000–0999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-12-14 571-991-1XXX 1000–1999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-12-14 571-991-2XXX 2000–2999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-12-11 571-766-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN17 VA
2007-12-11 571-766-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN17 VA
2007-12-10 571-296-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-12-10 571-296-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-12-10 571-296-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-12-10 571-296-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-12-10 571-296-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-12-10 571-296-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-12-10 571-379-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2007-12-10 571-379-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2007-12-03 571-307-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2007-12-03 571-307-3XXX 3000–3999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2007-11-21 571-285-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J DALE CITY VA
2007-11-19 571-291-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2007-11-19 571-303-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2007-11-13 571-339-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ENGLESIDE VA
2007-11-12 571-294-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-11-12 571-294-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-11-12 571-294-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-11-12 571-294-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-11-12 571-294-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-11-12 571-294-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-11-12 571-294-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-11-12 571-294-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-11-12 571-294-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-11-12 571-294-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2007-11-12 571-918-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2007-11-12 571-918-3XXX 3000–3999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2007-11-12 571-918-5XXX 5000–5999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2007-11-06 571-222-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HAYMARKET VA
2007-11-02 571-384-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-11-02 571-482-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2007-11-02 571-765-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2007-10-30 571-257-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2007-10-30 571-303-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2007-10-25 571-205-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2007-10-16 571-257-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2007-10-11 571-350-0XXX 0000–0999Assigned ONVOY, LLC - VA 138E WSNGTNZN19 VA
2007-10-09 571-432-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2007-10-09 571-490-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 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.