Overview of services running on Port 5550 TCP.
~36 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
arcserve	ARCserve Discovery					20982	57.865
irc	Dancer ircd					4058	11.191
no match						2915	8.039
chat	AIM or ICQ server					2329	6.423
ssl	TLSv1					1743	4.807
http						555	1.531
ssl	SSLv3					515	1.42
http	lighttpd	1.4.19				405	1.117
http	Microsoft IIS httpd					240	0.662
smtp						178	0.491
http	GoAhead-Webs httpd					155	0.427
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		137	0.378
irc-proxy	psyBNC	2.3.2-7				122	0.336
http	Boa HTTPd	0.94.14rc21				121	0.334
http	thttpd	2.24				108	0.298
vnc	VNC		protocol 3.8			105	0.29
ssh			protocol 1.5			92	0.254
http	Hikvision-Webs					58	0.16
ftp	Microsoft ftpd			Windows		53	0.146
http	thttpd	2.25b				50	0.138
ssh	OpenSSH	4.3	protocol 2.0			46	0.127
telnet						41	0.113
http			Broadband High-Performance Router			36	0.099
vnc			protocol 3			35	0.097
http	thttpd					35	0.097
ssh	OpenSSH	5.3	protocol 2.0			34	0.094
http	Apache Tomcat/Coyote JSP engine	1.1				32	0.088
vnc	RealVNC Enterprise		protocol 4.1			30	0.083
http	Boa HTTPd	0.94.13				30	0.083
http	D-Link router/Airlink NAS http config					28	0.077
http-proxy	Squid http proxy	2.6.STABLE12				23	0.063