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	Count	Percent
cvspserver	cvs pserver	10913	39.45
irc	Dancer ircd	3652	13.202
telnet	Cisco IOS telnetd	2190	7.917
http		2032	7.346
no match	-/-	1597	5.773
chat	AIM or ICQ server	1476	5.336
telnet		1391	5.028
cvspserver	CVSNT cvs pserver	1232	4.454
http	lighttpd	347	1.254
http	Microsoft IIS httpd	177	0.64
telnet	Cisco 1721 router telnetd	171	0.618
http	GoAhead-Webs httpd	165	0.596
ssh	OpenSSH	160	0.578
http	Gateway-Webs	142	0.513
http	thttpd	138	0.499
http	Microsoft HTTPAPI httpd	123	0.445
http	WangWnagSimpleServer	120	0.434
ssh		92	0.333
vnc	VNC	82	0.296
http	Apache	79	0.286
http	Boa HTTPd	50	0.181
tcpwrapped	BSD TCP Wrappers	37	0.134
http	Apache Tomcat/Coyote JSP engine	37	0.134
arcserve	ARCserve Discovery	35	0.127
smtp	Microsoft Exchange smtpd	29	0.105
http-proxy	Squid http proxy	28	0.101
ftp	Microsoft ftpd	27	0.098
telnet	Cisco router telnetd	25	0.09
nntp	INN nntpd	25	0.09
http	nginx	25	0.09
cvspserver	SunOS cvs pserver	25	0.09
http	Hikvision-Webs	24	0.087
ssh	Dropbear sshd	20	0.072
mysql	MySQL	19	0.069
achat	AChat chat system	19	0.069
ftp	ProFTPD	18	0.065
ftp	vsftpd	16	0.058
ssl	TLS	15	0.054
smtp	Microsoft ESMTP	15	0.054
bittorrent	Bittorrent P2P client	15	0.054
svnserve	Subversion	14	0.051
ftp	FileZilla ftpd	12	0.043
directconnect	Direct Connect P2P	12	0.043
cvspserver	CVS pserver	12	0.043
http	http server 1.0	10	0.036
ftp	Pure-FTPd	10	0.036