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
2014-11-07 571-585-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2014-11-07 571-585-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2014-11-05 571-489-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2014-11-05 571-730-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2014-10-27 571-589-9XXX 9000–9999Assigned METROPCS, INC. 5562 DALE CITY VA
2014-10-23 571-919-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2014-10-22 571-919-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2014-10-22 571-919-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2014-10-15 571-489-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2014-10-15 571-645-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2014-10-15 571-645-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2014-10-15 571-645-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2014-10-15 571-645-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2014-10-15 571-645-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2014-10-15 571-645-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2014-10-15 571-645-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2014-10-13 571-598-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MANASSAS VA
2014-10-09 571-341-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2014-10-09 571-343-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2014-10-09 571-343-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2014-10-09 571-351-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2014-10-09 571-777-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E WSNGTNZN08 VA
2014-10-03 571-279-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN19 VA
2014-10-03 571-349-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 ARCOLA VA
2014-10-01 571-349-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J ARCOLA VA
2014-10-01 571-510-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEESBURG VA
2014-09-30 571-298-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DALE CITY VA
2014-09-30 571-598-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MANASSAS VA
2014-09-29 571-349-3XXX 3000–3999Assigned VERIZON SOUTH, INC. - VA (CONTEL) 0233 ARCOLA VA
2014-09-24 571-341-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2014-09-24 571-341-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2014-09-24 571-446-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2014-09-24 571-446-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2014-09-16 571-919-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2014-09-15 571-598-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2014-09-15 571-598-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2014-09-15 571-598-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2014-09-15 571-719-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2014-09-12 571-446-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2014-09-11 571-261-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAYMARKET VA
2014-09-11 571-446-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2014-09-11 571-446-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2014-09-11 571-446-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2014-09-11 571-446-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HERNDON VA
2014-09-10 571-510-1XXX 1000–1999Assigned METROPCS, INC. 5562 LEESBURG VA
2014-09-09 571-398-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 OCCOQUAN VA
2014-08-29 571-919-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LEESBURG VA
2014-08-26 571-494-6XXX 6000–6999Assigned METROPCS, INC. 5562 TRIANGLE VA
2014-08-22 571-290-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2014-08-22 571-290-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 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.