NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 703
TELEPORT COMMUNICATIONS AMERICA, LLC - DC 60
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
2022-06-29 703-807-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2018-02-15 703-721-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN08 VA
2017-02-17 703-420-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 MANASSAS VA
2017-02-15 703-423-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 DULLES VA
2017-02-15 703-423-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 DULLES VA
2017-02-15 703-423-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 DULLES VA
2017-02-15 703-423-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 DULLES VA
2017-02-15 703-423-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 DULLES VA
2017-02-15 703-423-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 DULLES VA
2017-02-15 703-423-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 DULLES VA
2017-02-15 703-423-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 DULLES VA
2013-10-04 703-713-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2011-01-17 703-949-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2011-01-17 703-949-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2007-01-10 703-539-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN19 VA
2005-11-03 703-543-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 BRADDOCK VA
2005-10-17 703-462-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN17 VA
2005-10-14 703-889-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2005-09-16 703-286-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN17 VA
2005-09-14 703-663-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN17 VA
2005-05-03 703-463-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-10-21 703-342-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN17 VA
2004-08-18 703-466-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-08-18 703-466-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-08-18 703-466-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-08-13 703-336-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN17 VA
2004-06-18 703-376-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-06-15 703-291-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 TRIANGLE VA
2004-06-15 703-986-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 DALE CITY VA
2004-06-15 703-987-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 OCCOQUAN VA
2004-05-07 703-982-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 LORTON VA
2004-04-08 703-663-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN17 VA
2004-04-06 703-992-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN17 VA
2004-02-18 703-439-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-02-18 703-439-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-02-18 703-439-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-02-18 703-579-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-02-18 703-579-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-01-09 703-434-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-01-09 703-434-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-01-09 703-434-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2004-01-09 703-434-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2003-12-04 703-334-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 MANASSAS VA
2003-08-22 703-336-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSNGTNZN17 VA
2002-07-30 703-943-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2002-07-30 703-943-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2002-07-30 703-943-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2002-07-30 703-943-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2002-07-30 703-943-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 HERNDON VA
2002-06-21 703-334-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 MANASSAS VA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.