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
2019-07-16 571-360-7XXX 7000–7999Assigned CORETEL VIRGINIA, LLC - VA 5832 INDENDNTHL VA
2019-07-16 571-360-8XXX 8000–8999Assigned CORETEL VIRGINIA, LLC - VA 5832 INDENDNTHL VA
2019-07-16 571-559-5XXX 5000–5999Assigned CORETEL VIRGINIA, LLC - VA 5832 ENGLESIDE VA
2019-07-16 571-559-9XXX 9000–9999Assigned CORETEL VIRGINIA, LLC - VA 5832 ENGLESIDE VA
2019-07-16 571-666-7XXX 7000–7999Assigned CORETEL VIRGINIA, LLC - VA 5832 WSNGTNZN17 VA
2019-07-11 571-463-1XXX 1000–1999Assigned VOIP INNOVATIONS, LLC 597F ARCOLA VA
2019-07-11 571-491-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DULLES VA
2019-07-11 571-685-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 HERNDON VA
2019-07-10 571-360-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F INDENDNTHL VA
2019-07-10 571-487-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ARCOLA VA
2019-07-08 571-634-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2019-07-08 571-685-2XXX 2000–2999Assigned VOIP INNOVATIONS, LLC 597F HERNDON VA
2019-06-28 571-752-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2019-06-26 571-440-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2019-06-26 571-636-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HAYMARKET VA
2019-06-19 571-370-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ARCOLA VA
2019-06-12 571-440-3XXX 3000–3999Assigned METROPCS, INC. 5562 LEESBURG VA
2019-06-12 571-685-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2019-06-11 571-491-6XXX 6000–6999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DULLES VA
2019-06-11 571-685-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2019-06-10 571-401-9XXX 9000–9999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G HERNDON VA
2019-06-06 571-404-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BRADDOCK VA
2019-05-30 571-600-1XXX 1000–1999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G DULLESMTRO VA
2019-05-24 571-642-9XXX 9000–9999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2019-05-21 571-833-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MANASSAS VA
2019-05-17 571-370-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F ARCOLA VA
2019-05-17 571-380-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LORTON VA
2019-05-17 571-404-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F BRADDOCK VA
2019-05-17 571-440-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F LEESBURG VA
2019-05-15 571-636-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HAYMARKET VA
2019-05-14 571-833-0XXX 0000–0999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2019-05-14 571-833-1XXX 1000–1999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2019-05-14 571-833-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2019-05-14 571-833-4XXX 4000–4999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2019-05-10 571-404-7XXX 7000–7999Assigned CORETEL VIRGINIA, LLC - VA 5832 BRADDOCK VA
2019-05-10 571-404-8XXX 8000–8999Assigned CORETEL VIRGINIA, LLC - VA 5832 BRADDOCK VA
2019-05-10 571-493-2XXX 2000–2999Assigned CORETEL VIRGINIA, LLC - VA 5832 DALE CITY VA
2019-05-10 571-493-6XXX 6000–6999Assigned CORETEL VIRGINIA, LLC - VA 5832 DALE CITY VA
2019-05-10 571-493-7XXX 7000–7999Assigned CORETEL VIRGINIA, LLC - VA 5832 DALE CITY VA
2019-05-07 571-401-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F HERNDON VA
2019-05-03 571-440-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2019-05-01 571-401-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2019-05-01 571-491-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F DULLES VA
2019-05-01 571-752-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HERNDON VA
2019-04-26 571-833-3XXX 3000–3999Assigned PEERLESS NETWORK OF VIRGINIA, LLC - VA 275G MANASSAS VA
2019-04-24 571-347-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2019-04-24 571-440-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LEESBURG VA
2019-04-24 571-666-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2019-04-22 571-380-7XXX 7000–7999Assigned ONVOY, LLC - VA 138E LORTON VA
2019-04-22 571-380-8XXX 8000–8999Assigned ONVOY, LLC - VA 138E LORTON 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.