Overview of services running on Port 6661 TCP.
~18 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
irc	Dancer ircd					4039	22.123
no match						2970	16.268
chat	AIM or ICQ server					2155	11.804
telnet	Cisco telnetd			IOS	router	2005	10.982
irc	Unreal ircd					1382	7.57
irc	InspIRCd					815	4.464
telnet						711	3.894
http						534	2.925
http	lighttpd	1.4.19				426	2.333
http	Microsoft IIS httpd					232	1.271
http	lighttpd	1.4.29				172	0.942
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		160	0.876
http	GoAhead-Webs httpd					118	0.646
ssh			protocol 1.5			95	0.52
http	thttpd	2.24				70	0.383
http	Boa HTTPd	0.94.14rc21				64	0.351
http	Apache Tomcat/Coyote JSP engine	1.1				63	0.345
vnc	VNC		protocol 3.8			62	0.34
socks5						48	0.263
irc						47	0.257
irc	ircu ircd					46	0.252
irc	IRCnet ircd					37	0.203
ssh	OpenSSH	4.3	protocol 2.0			30	0.164
http	thttpd	2.25b				29	0.159
ftp	Microsoft ftpd			Windows		27	0.148
http-proxy	Squid http proxy	2.7.STABLE9				25	0.137
irc	ratbox ircd					24	0.131
arcserve	ARCserve Discovery					23	0.126
http	Hikvision-Webs					21	0.115