NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 571-229

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 571-229 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 571 blocks

Most active assignees, all time — NPA 571
NEW CINGULAR WIRELESS PCS, LLC - DC 3
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 2
PAETEC ITEL, LLC 1
LEVEL 3 COMMUNICATIONS, LLC - VA 1
COMCAST IP PHONE, LLC 1
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
2004-07-13 571-229-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2004-06-07 571-229-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J MANASSAS VA
2004-07-13 571-229-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2004-09-09 571-229-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MANASSAS VA
2005-11-14 571-229-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2005-08-18 571-229-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MANASSAS VA
2008-02-06 571-229-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MANASSAS VA
2010-01-29 571-229-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - VA 079F MANASSAS VA
2005-08-16 571-229-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 MANASSAS VA
2005-03-08 571-229-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J MANASSAS 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.