Overview of services running on Port 2401 TCP.
~27 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
cvspserver	cvs pserver					10913	39.45
irc	Dancer ircd					3652	13.202
telnet	Cisco IOS telnetd			IOS	switch	2190	7.917
http						2032	7.346
no match						1597	5.773
chat	AIM or ICQ server					1476	5.336
telnet						1390	5.025
cvspserver	CVSNT cvs pserver					1232	4.454
http	lighttpd	1.4.19				347	1.254
http	Microsoft IIS httpd					177	0.64
telnet	Cisco 1721 router telnetd			IOS	router	171	0.618
http	GoAhead-Webs httpd					165	0.596
http	Gateway-Webs					142	0.513
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		123	0.445
http	WangWnagSimpleServer	1.0				120	0.434
ssh			protocol 1.5			90	0.325
http	thttpd	2.24				77	0.278
vnc	VNC		protocol 3.8			59	0.213
http	Apache Tomcat/Coyote JSP engine	1.1				37	0.134
arcserve	ARCserve Discovery					35	0.127
http	thttpd	2.25b				33	0.119
http	Boa HTTPd	0.94.14rc21				29	0.105
ftp	Microsoft ftpd			Windows		26	0.094
telnet	Cisco router telnetd			IOS	router	25	0.09
nntp	INN nntpd		posting ok			25	0.09
cvspserver	SunOS cvs pserver			SunOS		25	0.09
http	Hikvision-Webs					24	0.087
tcpwrapped	BSD TCP Wrappers		cvs			23	0.083
smtp	Microsoft Exchange smtpd	6.0.3790.1830		Windows		20	0.072