Overview of services running on Port 6646 TCP.
~22 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
http						5318	23.332
irc	Dancer ircd					3894	17.084
http	SonicWALL				firewall	3670	16.101
chat	AIM or ICQ server					1921	8.428
telnet	Cisco telnetd			IOS	router	1576	6.914
no match						1102	4.835
http	AIM	1.0				646	2.834
telnet						563	2.47
ssl	SSLv3					486	2.132
http	lighttpd	1.4.29				432	1.895
http	lighttpd	1.4.19				427	1.873
http-proxy	Squid http proxy	2.7.STABLE9				385	1.689
http	Microsoft IIS httpd	6.0		Windows		127	0.557
ssh			protocol 1.5			93	0.408
http	Apache Tomcat/Coyote JSP engine	1.1				75	0.329
http	Netwave IP camera http config				webcam	70	0.307
http	mini_httpd	1.19 19dec2003				68	0.298
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		62	0.272
http	GoAhead-Webs httpd					61	0.268
http	PDR-M800	1.0				58	0.254
http	Avtech AVN801 network camera	1.0	UPnP 1.0		webcam	55	0.241
http	GoAhead-Webs					52	0.228
http	thttpd	2.24				43	0.189
http	Microsoft IIS httpd					41	0.18
http	Apache					40	0.175
vnc	VNC		protocol 3.8			38	0.167
http	thttpd	2.24 26oct2003				34	0.149
http	Boa HTTPd	0.94.14rc21				30	0.132
ftp	Microsoft ftpd			Windows		26	0.114
http-proxy	Squid http proxy					25	0.11
http	Microsoft IIS httpd	7.5		Windows		24	0.105
http	Apache		SSL-only mode			22	0.097
http	Apache	2.2.3	(CentOS)			22	0.097
http	Hikvision-Webs					21	0.092
http	uTorrent WebUI			Windows		20	0.088