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<h1 id="tcpview-v417">TCPView v4.17</h1>
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<time class="" data-article-date="" aria-label="Article review date" datetime="2022-01-27T23:12:00.000Z" data-article-date-source="git">01/27/2022</time>
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<h2 id="ms--in-this-article" class="title is-6 margin-block-xs"><!---->In this article<!----></h2>
<ol>
<!---->
<li>
<a href="#introduction"><!---->Introduction<!----></a>
</li>
<!---->
<li>
<a href="#using-tcpview"><!---->Using TCPView<!----></a>
</li>
<!---->
<li>
<a href="#using-tcpvcon"><!---->Using Tcpvcon<!----></a>
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<p><strong>By Mark Russinovich</strong></p>
<p>Published: January 27, 2022</p>
<p><a href="https://download.sysinternals.com/files/TCPView.zip" data-linktype="external"><img src="media/shared/download_sm.png" alt="Download" data-linktype="relative-path"></a> <a href="https://download.sysinternals.com/files/TCPView.zip" data-linktype="external"><strong>Download TCPView</strong></a> <strong>(2.1 MB)</strong><br>
<strong>Run now</strong> from <a href="https://live.sysinternals.com/Tcpview.exe" data-linktype="external">Sysinternals Live</a>.</p>
<div class="heading-wrapper" data-heading-level="h2"><a class="anchor-link docon docon-link" href="#introduction" aria-label="Section titled: Introduction"></a><h2 id="introduction" class="heading-anchor">Introduction</h2></div>
<p>TCPView is a Windows program that will show you detailed listings of all
TCP and UDP endpoints on your system, including the local and remote
addresses and state of TCP connections. On Windows Server 2008, Vista,
and XP, TCPView also reports the name of the process that owns the
endpoint. TCPView provides a more informative and conveniently presented
subset of the Netstat program that ships with Windows. The TCPView
download includes Tcpvcon, a command-line version with the same
functionality.</p>
<p><img src="media/tcpview/tcpview.png" alt="TCP View screenshot" data-linktype="relative-path"></p>
<div class="heading-wrapper" data-heading-level="h2"><a class="anchor-link docon docon-link" href="#using-tcpview" aria-label="Section titled: Using TCPView"></a><h2 id="using-tcpview" class="heading-anchor">Using TCPView</h2></div>
<p>When you start TCPView it will enumerate all active TCP and UDP
endpoints, resolving all IP addresses to their domain name versions. You
can use a toolbar button or menu item to toggle the display of resolved
names. TCPView shows the name of the process that owns each endpoint, including the service name (if any).</p>
<p>By default, TCPView updates every second, but you can use the
<strong>Options|Refresh Rate</strong> menu item to change the rate. Endpoints that
change state from one update to the next are highlighted in yellow;
those that are deleted are shown in red, and new endpoints are shown in
green.</p>
<p>You can close established TCP/IP connections (those labeled with a state
of ESTABLISHED) by selecting <strong>File|Close Connections</strong>, or by
right-clicking on a connection and choosing <strong>Close Connections</strong> from
the resulting context menu.</p>
<p>You can save TCPView's output window to a file using the <strong>Save</strong> menu
item.</p>
<div class="heading-wrapper" data-heading-level="h2"><a class="anchor-link docon docon-link" href="#using-tcpvcon" aria-label="Section titled: Using Tcpvcon"></a><h2 id="using-tcpvcon" class="heading-anchor">Using Tcpvcon</h2></div>
<p>Tcpvcon usage is similar to that of the built-in Windows netstat
utility:</p>
<p><strong>Usage:</strong></p>
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</div><pre tabindex="0" class="has-inner-focus"><code class="lang-Shell" data-author-content="tcpvcon [-a] [-c] [-n] [process name or PID]
"><span>tcpvcon [-a] [-c] [-n] [process name or PID]
</span></code></pre>
<div class="has-inner-focus"><table aria-label="Table 1" class="table table-sm">
<thead>
<tr>
<th>Parameter</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>-a</strong></td>
<td>Show all endpoints (default is to show established TCP connections).</td>
</tr>
<tr>
<td><strong>-c</strong></td>
<td>Print output as CSV.</td>
</tr>
<tr>
<td><strong>-n</strong></td>
<td>Don't resolve addresses.</td>
</tr>
</tbody>
</table></div>
<p><a href="https://download.sysinternals.com/files/TCPView.zip" data-linktype="external"><img src="media/shared/download_sm.png" alt="Download" data-linktype="relative-path"></a> <a href="https://download.sysinternals.com/files/TCPView.zip" data-linktype="external"><strong>Download TCPView</strong></a> <strong>(2.1 MB)</strong></p>
<p><strong>Run now</strong> from <a href="https://live.sysinternals.com/Tcpview.exe" data-linktype="external">Sysinternals Live</a>.</p>
<p><strong>Runs on:</strong></p>
<ul>
<li>Client: Windows 8.1 and higher.</li>
<li>Server: Windows Server 2012 and higher.</li>
</ul>
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