Overview of services running on Port 311 TCP.
~59 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	Count	Percent
ssl	SSLv3	35591	60.235
http		9248	15.651
http	SonicWALL	3689	6.243
http	Apache	2270	3.842
chat	AIM or ICQ server	2172	3.676
http	a_63	1159	1.962
no match	-/-	1011	1.711
http	lighttpd	926	1.567
http	AIM	609	1.031
http	Microsoft IIS httpd	249	0.421
http	thttpd	143	0.242
http	GoAhead-Webs httpd	113	0.191
ssh	OpenSSH	111	0.188
ssh		100	0.169
http	Microsoft HTTPAPI httpd	93	0.157
http	Apache Tomcat/Coyote JSP engine	92	0.156
http	Netwave IP camera http config	88	0.149
http	Avtech AVN801 network camera	69	0.117
http-proxy	Squid http proxy	67	0.113
directconnect	Direct Connect P2P	62	0.105
http	MiniServ	57	0.096
http	Boa HTTPd	53	0.09
vnc	VNC	51	0.086
telnet		51	0.086
http	PDR-M800	43	0.073
http	mini_httpd	32	0.054
arcserve	ARCserve Discovery	32	0.054
mysql	MySQL	26	0.044
http	Hikvision-Webs	24	0.041
http	nginx	22	0.037
http	AppleShareIP	22	0.037
ftp	Microsoft ftpd	22	0.037
http	Mbedthis-Appweb	20	0.034
ftp	vsftpd	19	0.032
ftp	FileZilla ftpd	19	0.032
ftp		19	0.032
http	GoAhead-Webs	18	0.03
http	Apple Server Monitor http interface	18	0.03
http	uc-httpd	17	0.029
http	Gadspot/Avtech AV787 webcam http config	16	0.027
ftp	ProFTPD	16	0.027
http	GeoVision GeoHttpServer for webcams	14	0.024
http	uTorrent WebUI	13	0.022
http-proxy	F5 BIG-IP load balancer http proxy	12	0.02
ftp	Pure-FTPd	12	0.02
smtp	Microsoft Exchange smtpd	11	0.019
http	DVR Systems webcam http interface	11	0.019
http	Cross Web Server	11	0.019
http	AIM HTTP	10	0.017