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Introduction
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 NT, 2000 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.TCPView works on Windows NT/2000/XP and Windows 98/Me. You can use TCPView on Windows 95 if you get the Windows 95 Winsock 2 Update from Microsoft.
Using TCPView
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 atoolbar button or menu item to toggle the display of resolved names. On Windows XP systems, TCPView shows the name of the process that owns each endpoint.By default, TCPView updates every second, but you can use the Options|Refresh Rate 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.
You can close established TCP/IP connections (those labeled with a state of ESTABLISHED) by selecting File|Close Connections, or by right-clicking on a connection and choosing Close Connections from the resulting context menu.
You can save TCPView's output window to a file using the Save menu item.
Source Code to Netstatp
Wonder how TCPView works? Previous versions relied on SNMP (Simple Network Management Protocol) interfaces to obtain TCP/IP information. Starting with version 2.0, TCPVIew uses the IP Helper interfaces documented in MSDN. The complete source for the command-line version of TCPView, netstatp, demonstrate the IP Helper interface and is available here for download.Related Utility
TDImon shows you TCP and UDP activity in real-time.
If you like TCPView, you'll love TCPView Pro. TCPView Pro, a Winternals Software product, has a number of features that make it much more powerful and useful than TCPView: See what process has each endpoint opened (on Win9x as well)
- Watch the TCP and UDP activity processes perform in realtime
- Used advanced filtering to narrow in on what you want to see
- And much more...
Download TCPView (35 KB)
Download Netstatp with Source Code (42 KB)