Overview of services running on Port 6666 TCP.
~116 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
socks5		43714	37.624
no match	-/-	19125	16.46
socks-proxy	Socks4A	7727	6.65
irc	Unreal ircd	5357	4.611
irc	Dancer ircd	4142	3.565
http		3755	3.232
ssh	OpenSSH	3332	2.868
melange	Melange Chat Server	2724	2.344
chat	AIM or ICQ server	2569	2.211
telnet	Cisco telnetd	2058	1.771
http	Microsoft IIS httpd	1898	1.634
http-proxy	Squid http proxy	1248	1.074
vnc	VNC	1139	0.98
irc	InspIRCd	1095	0.942
http	Microsoft HTTPAPI httpd	815	0.701
telnet		790	0.68
http	lighttpd	739	0.636
http	Boa HTTPd	729	0.627
http	thttpd	584	0.503
irc	ircu ircd	527	0.454
http	Apache Tomcat/Coyote JSP engine	500	0.43
http	GoAhead-Webs httpd	450	0.387
http	Apache	416	0.358
http	Virata-EmWeb	381	0.328
irc		379	0.326
ca-mq	CA Message Queuing Server	349	0.3
remoting	MS .NET Remoting services	334	0.287
http	nginx	299	0.257
eggdrop	Eggdrop irc bot console	290	0.25
irc	IRCnet ircd	286	0.246
irc	ratbox ircd	272	0.234
ssh	MikroTik RouterOS sshd	253	0.218
ssl	TLS	236	0.203
http	Hikvision-Webs	200	0.172
http	ProLinux	197	0.17
ftp	FileZilla ftpd	187	0.161
ftp	Serv-U ftpd	179	0.154
directconnect	Direct Connect P2P	175	0.151
vnc	RealVNC Personal	174	0.15
http	Router	168	0.145
vnc	RealVNC Enterprise	158	0.136
http	PROLinux	146	0.126
smtp		141	0.121
ftp	Microsoft ftpd	139	0.12
ssh	Dropbear sshd	137	0.118
mysql	MySQL	137	0.118
http	Jetty	129	0.111
ftp		122	0.105
irc	IRCnet-based ircd	116	0.1
http	TP-LINK Router	114	0.098
arcserve	ARCserve Discovery	114	0.098
ssh		110	0.095
ftp	ProFTPD	110	0.095
ftp	vsftpd	109	0.094
intranetchat	Intranet Chat Server	108	0.093
http	MiniServ	96	0.083
irc	BitlBee IRCd	94	0.081
http	micro_httpd	94	0.081
ovm-manager	Oracle VM Manager	89	0.077
telnet	CircleMUD telnetd	81	0.07
irc-proxy	psyBNC	75	0.065
vnc		70	0.06
eggdrop	Eggdrop IRC bot console	70	0.06
lexlm	Lexmark language monitor	66	0.057
upnp	Microsoft Windows UPnP	65	0.056
http	MpVodServer	65	0.056
mongodb	MongoDB	62	0.053
http	http server 1.0	62	0.053
xml		59	0.051
napster	WinMX or Lopster Napster P2P client	54	0.046
ftp	Pure-FTPd	53	0.046
http	Ubicom	51	0.044
http	Linksys router http config	49	0.042
http	Allegro RomPager	48	0.041
http	Boa httpd	46	0.04
ftp	Gene6 ftpd	45	0.039
http-proxy	MikroTik http proxy	44	0.038
jabber	Jabber instant messaging server	41	0.035
svnserve	Subversion	40	0.034
http	GeoVision GeoHttpServer for webcams	39	0.034
ssh	WeOnlyDo sshd	36	0.031
http	webserver	36	0.031
smtp	Postfix smtpd	33	0.028
shell	w4ck1ng-shell	33	0.028
irc	Hybrid-based ircd	33	0.028
http	WYM httpd	32	0.028
smtp	Microsoft ESMTP	31	0.027
http	uTorrent http admin	29	0.025
http	Router Webserver	29	0.025
http-proxy	Haproxy http proxy	29	0.025
http	InterSect Alliance SNARE http config	28	0.024
http	H3C-Miniware-Webs	28	0.024
vnc	Apple remote desktop vnc	26	0.022
mpd	Music Player Daemon	26	0.022
irc-proxy	ShroudBNC irc-proxy	26	0.022
telnet	Linux telnetd	25	0.022
ntop-http	Ntop web interface	25	0.022
smtp	Microsoft Exchange smtpd	24	0.021
ssh	SCS sshd	23	0.02
http	RealVNC	22	0.019
http	Microsoft ISA httpd	22	0.019
http	httpd 1.1	22	0.019
http	AR7 embedded httpd	22	0.019
ftp	Synology DiskStation NAS ftpd	22	0.019
socks4	Connection ok	21	0.018
openvpn	OpenVPN	21	0.018
netbios-ssn		21	0.018
irc	ngircd	20	0.017
soap	gSOAP soap	19	0.016
java-rmi	Java RMI	19	0.016
http	WebLogic httpd	19	0.016
http	Cisco IOS http config	19	0.016
ftp	Dreambox ftpd	19	0.016
ssh	Cisco SSH	18	0.015
http	MS .NET Remoting httpd	18	0.015
ftp	IndiFTPD	18	0.015
upnp	Conexant-EmWeb	17	0.015
http	uTorrent WebUI	17	0.015
http	Sagem F@st router httpd	17	0.015
tcpwrapped	BSD TCP Wrappers	16	0.014
smtp	Exim smtpd	16	0.014
http-proxy	CCProxy http proxy	16	0.014
http	Network Camera	16	0.014
http	monit httpd	16	0.014
ftp	SHARP MX-4100N printer ftpd	16	0.014
ssh	Bitvise WinSSHD	15	0.013
http-proxy	Tinyproxy	14	0.012
ssl	TLSv1	13	0.011
ssh	NetScreen sshd	12	0.01
imap	Microsoft Exchange 2007-2010 imapd	12	0.01
http	Oracle XML DB Enterprise Edition httpd	12	0.01
http	Caucho Resin JSP engine	12	0.01
spotify-login	Spotify login server	11	0.009
http	World Client WDaemon httpd	11	0.009
http	WindWeb	11	0.009
http	wg_httpd	11	0.009
http	uhttpd	11	0.009
http	Transmission BitTorrent management httpd	11	0.009
damewaremr	DameWare Mini Remote Control	11	0.009
vtun	Vtun Virtual Tunnel	10	0.009
telnet	EPIX Your Worldwide Internet Access	10	0.009
telnet	BusyBox telnetd	10	0.009
rtsp		10	0.009
netsupport	NetSupport PC remote control	10	0.009
http	uc-httpd	10	0.009
http	linux	10	0.009
http	Embedded HTTP Server.	10	0.009