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	Count	Percent
irc	Dancer ircd		3696	18.042
http	SonicWALL		3432	16.754
http			3308	16.148
telnet	Cisco telnetd		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	372	1.816
http	MythTV Linux PVR webadmin		322	1.572
http	Microsoft IIS httpd	6.0	154	0.752
http	DrcomServer1.0		111	0.542
ssh			91	0.444
http	Apache Tomcat/Coyote JSP engine	1.1	91	0.444
http	GoAhead-Webs		84	0.41
http	thttpd	2.24 26oct2003	74	0.361
http	Avtech AVN801 network camera	1.0	71	0.347
http	Netwave IP camera http config		67	0.327
http	Apache		59	0.288
http	HHS v1.0		58	0.283
http	Microsoft IIS httpd	7.5	55	0.268
vnc	VNC		48	0.234
http	PDR-M800	1.0	47	0.229
http	Apache	2.2.14	42	0.205
oracle-tns	Oracle TNS Listener		39	0.19
http	Apache	2.2.3	37	0.181
http	mini_httpd	1.19 19dec2003	31	0.151
http	Boa HTTPd	0.94.14rc21	31	0.151
http	Microsoft IIS httpd	7.0	30	0.146
http	Linux 3.2.0-27-generic		29	0.142
http-proxy	Squid http proxy		26	0.127
http	Apache	2.2.22	26	0.127
http	Apache	1.3.28	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
http	thttpd		17	0.083
http-proxy	EZproxy web proxy		17	0.083
http	Microsoft IIS httpd	5.1	17	0.083
http	Apache	2.0.53	17	0.083
http	uTorrent WebUI		16	0.078
http	Apache	2.2.16	16	0.078
ftp	Microsoft ftpd		16	0.078
http	lighttpd	1.4.20	15	0.073
http	GeoVision GeoHttpServer for webcams		15	0.073