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	Version	Count	Percent
ssl	SSLv3		35591	60.235
http			9248	15.651
http	SonicWALL		3689	6.243
chat	AIM or ICQ server		2172	3.676
http	a_63		1159	1.962
http	Apache	1.3.27	1042	1.764
no match	-/-	-/-	1011	1.711
http	Apache	2.2.8	724	1.225
http	AIM	1.0	609	1.031
http	lighttpd	1.4.19	462	0.782
http	lighttpd	1.4.29	419	0.709
http	Apache	1.3.26	161	0.272
http	Microsoft IIS httpd	6.0	146	0.247
http	GoAhead-Webs httpd		113	0.191
ssh			100	0.169
http	Microsoft HTTPAPI httpd	2.0	93	0.157
http	Apache Tomcat/Coyote JSP engine	1.1	92	0.156
http	Netwave IP camera http config		88	0.149
http	Avtech AVN801 network camera	1.0	69	0.117
http	thttpd	2.24	66	0.112
http	Microsoft IIS httpd		62	0.105
directconnect	Direct Connect P2P		62	0.105
http	Apache		61	0.103
http	MiniServ	1.580	54	0.091
vnc	VNC		51	0.086
telnet			51	0.086
http	PDR-M800	1.0	43	0.073
http	Apache	2.2.3	39	0.066
http	Apache	2.2.14	34	0.058
http	Boa HTTPd	0.94.14rc21	33	0.056
arcserve	ARCserve Discovery		32	0.054
http	mini_httpd	1.19 19dec2003	31	0.052
http-proxy	Squid http proxy	2.6.STABLE12	30	0.051
http	Apache	2.2.16	27	0.046
http-proxy	Squid http proxy	2.7.STABLE9	24	0.041
http	Hikvision-Webs		24	0.041
ssh	OpenSSH	4.3	21	0.036
ftp	Microsoft ftpd		21	0.036
http	thttpd		20	0.034
http	Mbedthis-Appweb	2.0.4	19	0.032
http	Apache	2.2.22	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	1.0.0	17	0.029
http	thttpd	2.24 26oct2003	17	0.029
http	Apache	2.0.53	17	0.029
ftp	vsftpd	2.0.8 or later	17	0.029
http	thttpd	2.25b	16	0.027
http	lighttpd	1.4.20	16	0.027
http	Gadspot/Avtech AV787 webcam http config		16	0.027
http	Apache	2.2.21	16	0.027