Network Stumbler (also known as NetStumbler) is a tool for Winows that facilitates detection of Wireless LANs using the 802.11b, 802.11a and 802.11g WLAN standards. It runs on Microsoft Windows operating systems from Windows 98 on up to Windows Vista (under compatibility mode). A trimmed-down version called MiniStumbler is available for the handheld Windows CE operating system.