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	Info	OS	Devicetype	Count	Percent
ssl	SSLv3					35591	60.235
http						9225	15.613
http	SonicWALL				firewall	3689	6.243
chat	AIM or ICQ server					2172	3.676
http	a_63					1159	1.962
no match						1011	1.711
http	Apache	1.3.27	(Darwin) mod_ssl/2.8.12 OpenSSL/0.9.7l			849	1.437
http	AIM	1.0				609	1.031
http	Apache	2.2.8	PHP/5.2.4-2ubuntu5.19 with Suhosin-Patch			539	0.912
http	lighttpd	1.4.19				461	0.78
http	lighttpd	1.4.29				419	0.709
http	Apache	1.3.27	(Darwin) mod_ssl/2.8.12 OpenSSL/0.9.7b			193	0.327
http	Apache	2.2.8	(Ubuntu) PHP/5.2.4-2ubuntu5.19 with Suhosin-Patch			178	0.301
http	Apache	1.3.26	(Darwin) mod_ssl/2.8.10 OpenSSL/0.9.6e			161	0.272
http	Microsoft IIS httpd	6.0		Windows		146	0.247
http	GoAhead-Webs httpd					112	0.19
ssh			protocol 1.5			97	0.164
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		93	0.157
http	Apache Tomcat/Coyote JSP engine	1.1				90	0.152
http	Netwave IP camera http config				webcam	88	0.149
http	Avtech AVN801 network camera	1.0	UPnP 1.0		webcam	69	0.117
http	thttpd	2.24				66	0.112
http	Microsoft IIS httpd					62	0.105
directconnect	Direct Connect P2P			Windows		62	0.105
http	MiniServ	1.580	Webmin httpd			54	0.091
telnet						50	0.085
http	PDR-M800	1.0				43	0.073
http	Apache					38	0.064
vnc	VNC		protocol 3.8			35	0.059
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-proxy	Squid http proxy	2.7.STABLE9				24	0.041
http	Hikvision-Webs					24	0.041
http	Apache		SSL-only mode			23	0.039
ftp	Microsoft ftpd			Windows		21	0.036
ssh	OpenSSH	4.3	protocol 2.0			20	0.034