NumberResearch Membership · Data 09/23/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/23/2026

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, all time — NPA 571
VERIZON VIRGINIA, INC. 120
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
2021-03-10 571-506-9XXX 9000–9999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2018-04-13 571-649-0XXX 0000–0999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-3XXX 3000–3999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-4XXX 4000–4999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-5XXX 5000–5999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-6XXX 6000–6999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-7XXX 7000–7999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-8XXX 8000–8999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2018-04-13 571-649-9XXX 9000–9999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN19 VA
2016-09-20 571-799-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2016-09-20 571-799-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2016-09-20 571-799-3XXX 3000–3999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2016-09-20 571-799-4XXX 4000–4999Assigned VERIZON VIRGINIA, INC. 9213 LEESBURG VA
2014-01-28 571-304-0XXX 0000–0999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON VA
2014-01-28 571-304-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON VA
2014-01-28 571-304-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON VA
2014-01-28 571-304-3XXX 3000–3999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON VA
2014-01-28 571-304-4XXX 4000–4999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON VA
2014-01-28 571-304-5XXX 5000–5999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON VA
2014-01-28 571-304-6XXX 6000–6999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON VA
2014-01-28 571-304-7XXX 7000–7999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON VA
2014-01-28 571-304-8XXX 8000–8999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON VA
2014-01-28 571-304-9XXX 9000–9999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON VA
2013-11-27 571-452-0XXX 0000–0999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2013-11-27 571-452-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2013-11-27 571-452-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2013-11-27 571-452-3XXX 3000–3999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2013-11-27 571-452-4XXX 4000–4999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2013-11-27 571-452-5XXX 5000–5999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2013-11-27 571-452-6XXX 6000–6999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2013-11-27 571-452-7XXX 7000–7999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2013-11-27 571-452-8XXX 8000–8999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2013-11-27 571-452-9XXX 9000–9999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2012-03-21 571-835-7XXX 7000–7999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN17 VA
2011-02-11 571-287-4XXX 4000–4999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON VA
2011-02-11 571-287-5XXX 5000–5999Assigned VERIZON VIRGINIA, INC. 9213 HERNDON VA
2010-11-29 571-372-0XXX 0000–0999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-11-29 571-372-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-11-29 571-372-2XXX 2000–2999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-11-29 571-372-3XXX 3000–3999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-11-29 571-372-4XXX 4000–4999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-11-29 571-372-5XXX 5000–5999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-11-29 571-372-6XXX 6000–6999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-11-29 571-372-7XXX 7000–7999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-11-29 571-372-8XXX 8000–8999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-11-29 571-372-9XXX 9000–9999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-05-03 571-231-0XXX 0000–0999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA
2010-05-03 571-231-1XXX 1000–1999Assigned VERIZON VIRGINIA, INC. 9213 WSNGTNZN08 VA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.