NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 573-768

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 573-768 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 573 blocks

Most active assignees, all time — NPA 573
NEW CINGULAR WIRELESS PCS, LLC - IL 7
TELEPORT COMMUNICATIONS AMERICA, LLC - MO 1
LEVEL 3 COMMUNICATIONS, LLC - MO 1
BANDWIDTH.COM CLEC, LLC - MO 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
— 573-768-0XXX 0000–0999Reserved NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PERRYVILLE MO
— 573-768-1XXX 1000–1999Reserved NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PERRYVILLE MO
— 573-768-2XXX 2000–2999Reserved NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PERRYVILLE MO
2003-09-11 573-768-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E PERRYVILLE MO
2004-03-08 573-768-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PERRYVILLE MO
— 573-768-5XXX 5000–5999Reserved NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PERRYVILLE MO
— 573-768-6XXX 6000–6999Reserved NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PERRYVILLE MO
2004-05-21 573-768-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 PERRYVILLE MO
2004-04-29 573-768-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 PERRYVILLE MO
2004-12-01 573-768-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PERRYVILLE MO

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.