Overview of services running on Port 6544 TCP.
~20 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					3696	18.042
http	SonicWALL				firewall	3432	16.754
http						3281	16.017
telnet	Cisco telnetd			IOS	router	1667	8.138
chat	AIM or ICQ server					1517	7.405
no match						1240	6.053
telnet						683	3.334
http	AIM	1.0				663	3.237
http	lighttpd	1.4.29				440	2.148
http	lighttpd	1.4.19				371	1.811
http	MythTV Linux PVR webadmin			Linux		322	1.572
http	Microsoft IIS httpd	6.0		Windows		154	0.752
http	DrcomServer1.0					111	0.542
ssh			protocol 1.5			88	0.43
http	Apache Tomcat/Coyote JSP engine	1.1				87	0.425
http	GoAhead-Webs					84	0.41
http	thttpd	2.24 26oct2003				74	0.361
http	Avtech AVN801 network camera	1.0	UPnP 1.0		webcam	71	0.347
http	Netwave IP camera http config				webcam	67	0.327
http	Microsoft IIS httpd	7.5		Windows		55	0.268
http	PDR-M800	1.0				47	0.229
http	HHS v1.0		IRX Configuration			46	0.225
vnc	VNC		protocol 3.8			40	0.195
oracle-tns	Oracle TNS Listener					39	0.19
http	Apache					33	0.161
http	mini_httpd	1.19 19dec2003				31	0.151
http	Boa HTTPd	0.94.14rc21				31	0.151
http	Microsoft IIS httpd	7.0		Windows		30	0.146
http	Linux 3.2.0-27-generic					29	0.142
http-proxy	Squid http proxy					26	0.127
http	Apache		SSL-only mode			26	0.127
http	Apache	2.2.3	(CentOS)			24	0.117
http	thttpd	2.25b 29dec2003				23	0.112
http	Hikvision-Webs					21	0.103
http	uc-httpd	1.0.0				20	0.098