Overview of services running on Port 6600 TCP.
~25 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
irc	Dancer ircd		3655	14.509
http	SonicWALL		3477	13.802
http			3252	12.909
no match	-/-	-/-	2935	11.651
irc	Unreal ircd		1604	6.367
chat	AIM or ICQ server		1598	6.343
telnet	Cisco telnetd		1516	6.018
vnc	VNC		730	2.898
http	AIM	1.0	666	2.644
ssh	Dropbear sshd	0.52	608	2.413
telnet			548	2.175
http	lighttpd	1.4.29	441	1.751
http	lighttpd	1.4.19	372	1.477
http	Indy	9.00.10	219	0.869
http	Microsoft IIS httpd	6.0	215	0.853
http	Apache Tomcat/Coyote JSP engine	1.1	127	0.504
soap	gSOAP soap	2.7	125	0.496
http	DrcomServer1.0		122	0.484
ssh			89	0.353
http	GoAhead-Webs		82	0.326
http	Netwave IP camera http config		75	0.298
http	Avtech AVN801 network camera	1.0	75	0.298
telnet	the MRV Communications' LX Series Server		74	0.294
http	thttpd	2.24 26oct2003	73	0.29
http	Apache		73	0.29
http	Microsoft IIS httpd	7.5	70	0.278
http	Microsoft IIS httpd	7.0	59	0.234
http	Boa HTTPd	0.94.14rc21	55	0.218
http	PDR-M800	1.0	52	0.206
http	Apache	2.2.14	49	0.195
http	Apache	2.2.22	43	0.171
ssl	TLS	1.0	42	0.167
http	Apache	2.2.3	41	0.163
vnc	RealVNC Enterprise		39	0.155
http	thttpd	2.25b 29dec2003	38	0.151
vnc			36	0.143
http	mini_httpd	1.19 19dec2003	36	0.143
http	uc-httpd	1.0.0	33	0.131
http	Apache	2.0.53	33	0.131
vnc-http	Ultr@VNC		31	0.123
http	GoAhead-Webs embedded httpd		31	0.123
ftp	Microsoft ftpd		26	0.103
ssh	OpenSSH	4.3	24	0.095
http-proxy	Squid http proxy	2.7.STABLE9	24	0.095
vnc	RealVNC Personal		23	0.091
http	Apache	2.2.9	23	0.091
xml			22	0.087
http-proxy	Squid http proxy		22	0.087
ftp	vsftpd (before 2.0.8) or WU-FTPD		22	0.087
shoutcast	SHOUTcast server	1.9.8	21	0.083
http	Gadspot/Avtech AV787 webcam http config		21	0.083
vnc-http	RealVNC	4.0	20	0.079
http	thttpd		20	0.079
http	DVR Systems webcam http interface		20	0.079
http	Apache	2.2.16	20	0.079
http-proxy	EZproxy web proxy		19	0.075
http	Microsoft IIS httpd		19	0.075
http	Hikvision-Webs		19	0.075
http	uTorrent WebUI		18	0.071
http	lighttpd	1.4.20	18	0.071
http	Mbedthis-Appweb	2.0.4	16	0.064
http	Apache	2.2.17	16	0.064
http	Microsoft IIS httpd	5.1	15	0.06
http	Apache	1.3.28	15	0.06