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
2021-09-13 571-513-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DALE CITY VA
2021-09-13 571-567-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2021-09-13 571-567-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2021-09-13 571-567-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2021-09-13 571-567-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2021-09-13 571-567-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2021-09-13 571-567-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN19 VA
2021-09-08 571-504-9XXX 9000–9999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2021-09-08 571-646-8XXX 8000–8999Assigned METROPCS, INC. 5562 ENGLESIDE VA
2021-09-07 571-567-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J WSNGTNZN19 VA
2021-08-30 571-646-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ENGLESIDE VA
2021-08-26 571-567-8XXX 8000–8999Assigned FRACTEL, LLC 965H WSNGTNZN19 VA
2021-08-16 571-541-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2021-08-16 571-541-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2021-08-16 571-541-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2021-08-12 571-518-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2021-08-12 571-518-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2021-08-12 571-518-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2021-08-12 571-518-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2021-08-12 571-686-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRADDOCK VA
2021-08-12 571-686-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRADDOCK VA
2021-08-11 571-507-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2021-08-11 571-507-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2021-08-11 571-507-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2021-08-10 571-504-8XXX 8000–8999Assigned FRACTEL, LLC 965H ENGLESIDE VA
2021-08-10 571-576-0XXX 0000–0999Assigned COMMIO, LLC 939H MANASSAS VA
2021-08-10 571-576-1XXX 1000–1999Assigned COMMIO, LLC 939H MANASSAS VA
2021-08-10 571-576-8XXX 8000–8999Assigned COMMIO, LLC 939H MANASSAS VA
2021-08-10 571-576-9XXX 9000–9999Assigned COMMIO, LLC 939H MANASSAS VA
2021-08-10 571-786-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J HERNDON VA
2021-08-09 571-519-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2021-08-09 571-519-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2021-08-03 571-576-2XXX 2000–2999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2021-08-03 571-576-3XXX 3000–3999Assigned ONVOY, LLC - VA 138E MANASSAS VA
2021-07-29 571-573-0XXX 0000–0999Assigned IP HORIZON LLC 515J NOKESVILLE VA
2021-07-29 571-615-1XXX 1000–1999Assigned IP HORIZON LLC 515J INDENDNTHL VA
2021-07-29 571-877-0XXX 0000–0999Assigned IP HORIZON LLC 515J LORTONMTRO VA
2021-07-29 571-934-5XXX 5000–5999Assigned IP HORIZON LLC 515J DULLES VA
2021-07-28 571-288-0XXX 0000–0999Assigned IP HORIZON LLC 515J DALE CITY VA
2021-07-28 571-462-0XXX 0000–0999Assigned IP HORIZON LLC 515J OCCOQUAN VA
2021-07-28 571-507-2XXX 2000–2999Assigned IP HORIZON LLC 515J WSNGTNZN17 VA
2021-07-28 571-519-5XXX 5000–5999Assigned IP HORIZON LLC 515J HERNDON VA
2021-07-28 571-561-0XXX 0000–0999Assigned IP HORIZON LLC 515J HAYMARKET VA
2021-07-28 571-646-1XXX 1000–1999Assigned IP HORIZON LLC 515J ENGLESIDE VA
2021-07-28 571-667-1XXX 1000–1999Assigned IP HORIZON LLC 515J LORTON VA
2021-07-28 571-686-0XXX 0000–0999Assigned IP HORIZON LLC 515J BRADDOCK VA
2021-07-28 571-773-1XXX 1000–1999Assigned IP HORIZON LLC 515J DULLESMTRO VA
2021-07-28 571-774-1XXX 1000–1999Assigned IP HORIZON LLC 515J TRIANGLE VA
2021-07-16 571-544-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2021-07-08 571-910-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON 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.