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
2006-11-10 571-252-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2006-11-10 571-252-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2006-11-09 571-484-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2006-11-07 571-226-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2006-11-07 571-226-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN17 VA
2006-10-30 571-484-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2006-10-27 571-312-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2006-10-27 571-830-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2006-10-25 571-918-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J LEESBURG VA
2006-10-24 571-722-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WSNGTNZN17 VA
2006-10-23 571-252-6XXX 6000–6999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2006-10-23 571-481-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2006-10-19 571-258-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEESBURG VA
2006-10-17 571-288-7XXX 7000–7999Assigned METROPCS, INC. 5562 DALE CITY VA
2006-10-17 571-288-8XXX 8000–8999Assigned METROPCS, INC. 5562 DALE CITY VA
2006-10-17 571-288-9XXX 9000–9999Assigned METROPCS, INC. 5562 DALE CITY VA
2006-10-12 571-484-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2006-10-03 571-991-4XXX 4000–4999Assigned METROPCS, INC. 5562 DALE CITY VA
2006-10-03 571-991-5XXX 5000–5999Assigned METROPCS, INC. 5562 DALE CITY VA
2006-10-03 571-991-6XXX 6000–6999Assigned METROPCS, INC. 5562 DALE CITY VA
2006-09-28 571-366-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2006-09-27 571-926-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2006-09-27 571-926-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2006-09-27 571-926-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2006-09-22 571-313-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2006-09-22 571-484-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2006-09-22 571-484-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2006-09-18 571-970-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2006-09-18 571-970-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2006-09-18 571-970-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2006-09-18 571-970-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2006-09-18 571-970-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2006-09-14 571-970-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2006-09-07 571-329-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2006-09-07 571-329-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2006-08-23 571-271-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2006-07-24 571-309-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2006-07-24 571-309-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2006-07-24 571-309-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2006-07-24 571-309-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2006-07-24 571-309-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2006-07-24 571-309-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2006-07-24 571-309-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2006-07-24 571-309-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2006-07-11 571-271-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2006-07-07 571-481-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2006-07-07 571-481-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2006-07-05 571-258-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEESBURG VA
2006-06-19 571-281-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 BRADDOCK VA
2006-06-13 571-223-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 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.