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
2007-05-14 571-313-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2007-05-09 571-291-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LEESBURG VA
2007-05-09 571-730-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN17 VA
2007-05-08 571-830-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2007-05-08 571-926-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2007-05-07 571-483-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2007-05-04 571-289-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-05-04 571-289-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-05-04 571-926-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2007-04-26 571-480-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2007-04-25 571-268-0XXX 0000–0999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-04-25 571-268-1XXX 1000–1999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-04-25 571-268-2XXX 2000–2999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-04-25 571-268-3XXX 3000–3999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-04-25 571-268-4XXX 4000–4999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-04-25 571-268-5XXX 5000–5999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-04-25 571-268-6XXX 6000–6999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-04-25 571-268-7XXX 7000–7999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2007-04-25 571-268-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2007-04-25 571-268-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2007-04-23 571-289-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-04-18 571-208-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J MANASSAS VA
2007-04-18 571-481-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2007-04-12 571-313-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2007-04-12 571-481-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-04-12 571-481-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-04-12 571-481-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN08 VA
2007-04-10 571-730-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2007-04-10 571-730-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2007-04-05 571-730-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2007-04-04 571-481-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2007-03-30 571-282-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J WSNGTNZN17 VA
2007-03-30 571-730-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN17 VA
2007-03-30 571-730-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN17 VA
2007-03-26 571-313-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2007-03-16 571-285-6XXX 6000–6999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-03-16 571-285-7XXX 7000–7999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-03-16 571-285-8XXX 8000–8999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-03-16 571-285-9XXX 9000–9999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-03-06 571-271-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2007-03-06 571-288-1XXX 1000–1999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-03-06 571-288-2XXX 2000–2999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-03-06 571-288-3XXX 3000–3999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-03-06 571-288-4XXX 4000–4999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-03-06 571-288-5XXX 5000–5999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-03-06 571-288-6XXX 6000–6999Assigned METROPCS, INC. 5562 DALE CITY VA
2007-02-26 571-303-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2007-02-26 571-303-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2007-02-26 571-303-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2007-02-26 571-303-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 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.