Overview of services running on Port 3900 TCP.
~9 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					3633	36.48
chat	AIM or ICQ server					1795	18.024
no match						1715	17.221
vnc	VNC		protocol 3.3			399	4.006
http	lighttpd	1.4.19				381	3.826
http						309	3.103
mysql	MySQL	4.1.18				217	2.179
http	Microsoft IIS httpd					167	1.677
vnc	VNC		protocol 3.8			152	1.526
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		115	1.155
ssh			protocol 1.5			84	0.843
http	thttpd	2.24				79	0.793
telnet						49	0.492
vnc	RealVNC Enterprise		protocol 4.1			36	0.361
vnc			protocol 3			36	0.361
vnc	RealVNC Personal		protocol 4.0			35	0.351
arcserve	ARCserve Discovery					35	0.351
http	Boa HTTPd	0.94.14rc21				32	0.321
http	thttpd	2.25b				28	0.281
ftp						25	0.251
msrpc	Microsoft Windows RPC			Windows		23	0.231
nntp	INN nntpd		posting ok			22	0.221
ftp	Microsoft ftpd			Windows		22	0.221
telnet	the MRV Communications' LX Series Server					20	0.201