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
2016-11-30 571-799-5XXX 5000–5999Assigned METROPCS, INC. 5562 LEESBURG VA
2016-11-09 571-342-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2016-11-09 571-376-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2016-11-09 571-525-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2016-11-09 571-525-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2016-11-09 571-599-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2016-11-09 571-999-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2016-11-03 571-459-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2016-11-03 571-599-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2016-11-03 571-665-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2016-11-03 571-665-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2016-11-02 571-320-3XXX 3000–3999Assigned METROPCS, INC. 5562 TRIANGLE VA
2016-11-02 571-932-9XXX 9000–9999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G LORTONMTRO VA
2016-11-01 571-252-4XXX 4000–4999Assigned METROPCS, INC. 5562 LEESBURG VA
2016-10-28 571-767-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2016-10-28 571-767-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2016-10-28 571-767-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2016-10-28 571-767-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2016-10-28 571-767-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2016-10-28 571-767-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2016-10-28 571-767-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2016-10-28 571-767-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2016-10-28 571-767-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2016-10-28 571-767-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2016-10-17 571-457-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2016-10-14 571-320-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 TRIANGLE VA
2016-10-14 571-376-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2016-10-14 571-789-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2016-10-14 571-789-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2016-10-11 571-525-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2016-09-27 571-371-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2016-09-27 571-371-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2016-09-27 571-371-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2016-09-27 571-371-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2016-09-27 571-371-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2016-09-21 571-565-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2016-09-21 571-565-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2016-09-21 571-835-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2016-09-20 571-525-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HERNDON VA
2016-09-20 571-799-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2016-09-20 571-799-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2016-09-20 571-799-3XXX 3000–3999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2016-09-20 571-799-4XXX 4000–4999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2016-09-19 571-457-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2016-09-14 571-525-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J HERNDON VA
2016-09-12 571-799-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LEESBURG VA
2016-09-07 571-260-1XXX 1000–1999Assigned NUSO, LLC 551G DALE CITY VA
2016-09-07 571-459-1XXX 1000–1999Assigned NUSO, LLC 551G WSNGTNZN19 VA
2016-09-07 571-466-1XXX 1000–1999Assigned NUSO, LLC 551G TRIANGLE VA
2016-09-07 571-486-8XXX 8000–8999Assigned NUSO, LLC 551G HAYMARKET 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.