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
2005-03-22 571-252-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2005-03-08 571-201-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN19 VA
2005-03-08 571-222-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J HAYMARKET VA
2005-03-08 571-229-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J MANASSAS VA
2005-03-04 571-209-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2005-03-04 571-209-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J LEESBURG VA
2005-02-25 571-931-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J TRIANGLE VA
2005-01-26 571-201-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2005-01-26 571-749-7XXX 7000–7999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2005-01-26 571-749-8XXX 8000–8999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2005-01-18 571-225-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-01-18 571-232-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-01-18 571-242-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-01-18 571-242-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-01-18 571-274-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2005-01-11 571-248-4XXX 4000–4999Assigned VERIZON SOUTH, INC. - VA (CONTEL) 0233 HAYMARKET VA
2005-01-07 571-527-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2004-12-28 571-204-0XXX 0000–0999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2004-12-28 571-204-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2004-12-28 571-204-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2004-12-28 571-204-3XXX 3000–3999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2004-12-28 571-204-4XXX 4000–4999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2004-12-28 571-204-5XXX 5000–5999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2004-12-28 571-204-6XXX 6000–6999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2004-12-28 571-204-7XXX 7000–7999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2004-12-28 571-204-8XXX 8000–8999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2004-12-28 571-204-9XXX 9000–9999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2004-12-14 571-281-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 BRADDOCK VA
2004-12-14 571-281-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 BRADDOCK VA
2004-12-08 571-271-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 LEESBURG VA
2004-12-01 571-438-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2004-11-22 571-921-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MANASSAS VA
2004-10-06 571-262-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2004-09-28 571-246-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2004-09-24 571-271-0XXX 0000–0999Assigned CORETEL VIRGINIA, LLC - VA 5832 LEESBURG VA
2004-09-13 571-201-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2004-09-09 571-229-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2004-09-08 571-722-9XXX 9000–9999Assigned METROPCS, INC. 5562 WSNGTNZN17 VA
2004-09-07 571-262-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2004-09-07 571-283-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2004-08-05 571-344-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2004-08-05 571-431-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2004-08-05 571-431-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSNGTNZN08 VA
2004-08-03 571-265-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2004-07-30 571-248-8XXX 8000–8999Assigned VERIZON SOUTH, INC. - VA (CONTEL) 0233 HAYMARKET VA
2004-07-13 571-229-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2004-07-13 571-229-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2004-07-07 571-265-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2004-06-21 571-246-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LEESBURG VA
2004-06-07 571-229-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J MANASSAS 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.