Overview of services running on Port 6663 TCP.
~28 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
no match	-/-	13341	46.428
irc	Dancer ircd	4066	14.15
chat	AIM or ICQ server	2143	7.458
telnet	Cisco telnetd	1965	6.838
irc	Unreal ircd	1308	4.552
irc	InspIRCd	791	2.753
telnet		701	2.44
http		648	2.255
http	lighttpd	619	2.154
http	Boa HTTPd	346	1.204
http	Microsoft IIS httpd	211	0.734
http	Microsoft HTTPAPI httpd	135	0.47
http	thttpd	132	0.459
ssh	OpenSSH	123	0.428
http	GoAhead-Webs httpd	119	0.414
ssh		96	0.334
socks5		90	0.313
http	Apache Tomcat/Coyote JSP engine	81	0.282
http	Apache	72	0.251
vnc	VNC	67	0.233
http-proxy	Squid http proxy	61	0.212
irc	IRCnet ircd	54	0.188
irc		49	0.171
irc	ircu ircd	40	0.139
mysql	MySQL	36	0.125
ftp	Microsoft ftpd	25	0.087
http	Hikvision-Webs	24	0.084
irc	ratbox ircd	23	0.08
http	nginx	22	0.077
arcserve	ARCserve Discovery	21	0.073
irc-proxy	psyBNC	18	0.063
ssl	TLS	17	0.059
smtp	Microsoft ESMTP	17	0.059
ftp		17	0.059
ftp	ProFTPD	16	0.056
telnet	Linux telnetd	15	0.052
http	Jetty	15	0.052
upnp	Microsoft Windows UPnP	14	0.049
http-proxy	F5 BIG-IP load balancer http proxy	13	0.045
ftp	Pure-FTPd	13	0.045
ftp	FileZilla ftpd	13	0.045
vnc	RealVNC Enterprise	12	0.042
smtp		12	0.042
ftp	Serv-U ftpd	11	0.038
vnc	RealVNC Personal	10	0.035
telnet	EPIX Your Worldwide Internet Access	10	0.035
smtp	Microsoft Exchange smtpd	10	0.035
ftp	vsftpd (before 2.0.8) or WU-FTPD	10	0.035
ftp	vsftpd	10	0.035