Overview of services running on Port 646 TCP.
~33 Thousand IP addresses observed from May to December 2012
To get raw lists of the data go to Download. For an explanation of what this data is and how it was obtained, see Paper.

Servicename Product Version Count Percent
no match-/--/-1393941.371
http896726.614
httpSonicWALL363010.774
chatAIM or ICQ server21806.47
sslSSLv37712.288
httpAIM1.05981.775
telnetLinux telnetd4861.442
httplighttpd1.4.294171.238
httplighttpd1.4.194091.214
httpMicrosoft IIS httpd6.01160.344
httpGoAhead-Webs httpd1060.315
ssh950.282
httpApache Tomcat/Coyote JSP engine1.1810.24
httpMicrosoft HTTPAPI httpd2.0760.226
httpthttpd2.24700.208
httpNetwave IP camera http config680.202
httpMicrosoft IIS httpd610.181
httpAvtech AVN801 network camera1.0610.181
httpApache550.163
telnet540.16
vncVNC430.128
httpPDR-M8001.0380.113
httpApache2.2.3370.11
httpApache2.2.14340.101
http-proxySquid http proxy2.6.STABLE12300.089
arcserveARCserve Discovery300.089
httpBoa HTTPd0.94.14rc21270.08
httpmini_httpd1.19 19dec2003250.074
httpApache2.2.22240.071
httpHikvision-Webs230.068
httpGoAhead-Webs230.068
httpthttpd2.25b210.062
httpMbedthis-Appweb2.0.4200.059
ftpMicrosoft ftpd190.056
httpthttpd2.24 26oct2003180.053
httpthttpd180.053
http-proxySquid http proxy2.7.STABLE9170.05
httpApache2.2.16150.045