NumberResearch Membership · Data 09/20/2026

Thousands-blocks in 573-271

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 573-271 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5
PEERLESS NETWORK OF MISSOURI, LLC - MO 1
ONVOY, LLC - MO 1
ONVOY SPECTRUM, LLC 1
LEVEL 3 COMMUNICATIONS, 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
— 573-271-0XXX 0000–0999Reserved CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CAPEGIRARD MO
— 573-271-1XXX 1000–1999Reserved CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CAPEGIRARD MO
2011-01-11 573-271-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 CAPEGIRARD MO
2013-03-27 573-271-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E CAPEGIRARD MO
— 573-271-4XXX 4000–4999Reserved CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CAPEGIRARD MO
2013-04-08 573-271-5XXX 5000–5999Assigned PEERLESS NETWORK OF MISSOURI, LLC - MO 225F CAPEGIRARD MO
— 573-271-6XXX 6000–6999Reserved CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CAPEGIRARD MO
2009-01-05 573-271-7XXX 7000–7999Assigned ONVOY, LLC - MO 093F CAPEGIRARD MO
2026-07-10 573-271-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 CAPEGIRARD MO
2024-12-19 573-271-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CAPEGIRARD 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.