Overview of services running on Port 31337 TCP.
~84 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
telnet	Netgear broadband router or ZyXel VoIP adapter telnetd		39992	47.514
http			10401	12.357
no match	-/-	-/-	4741	5.633
irc	Dancer ircd		4025	4.782
http	SonicWALL		3642	4.327
http	Microsoft HTTPAPI httpd	2.0	3554	4.223
irc-proxy	psyBNC	2.3.2-7	3499	4.157
chat	AIM or ICQ server		2209	2.625
eggdrop	Eggdrop IRC bot console	1.6.21	1884	2.238
http	streamts (ps)		1811	2.152
irc-proxy	psyBNC	2.3.2-9	658	0.782
http	AIM	1.0	646	0.768
irc-proxy	psyBNC	2.3.2-4	561	0.667
irc-proxy	psyBNC	2.3.1	452	0.537
http	lighttpd	1.4.19	410	0.487
irc-proxy	psyBNC	2.3BETA	358	0.425
http	ServerView Remote Management iRMC S3 Webserver		236	0.28
http	lighttpd	1.4.29	198	0.235
http	Microsoft IIS httpd	6.0	124	0.147
http-proxy	Squid http proxy	3.1.19	115	0.137
ssh	OpenSSH	5.1p1	110	0.131
http	GoAhead-Webs httpd		103	0.122
http	Apache Tomcat/Coyote JSP engine	1.1	102	0.121
ssh			98	0.116
irc-proxy	ShroudBNC irc-proxy	1.1 revision 371	97	0.115
http	ZNC IRC bouncer http config	0.097 or later	85	0.101
http	Apache		85	0.101
ssh	OpenSSH	4.3	76	0.09
http-proxy	Squid http proxy		69	0.082
vnc	VNC		65	0.077
irc-proxy	psyBNC	2.2.1	62	0.074
ssh	OpenSSH	4.5p1	61	0.072
telnet			60	0.071
ssh	Dropbear sshd	0.52	60	0.071
http	uTorrent WebUI		59	0.07
http	Netwave IP camera http config		57	0.068
ssh	OpenSSH	5.3	56	0.067
http	Avtech AVN801 network camera	1.0	53	0.063
smtp	Postfix smtpd		51	0.061
irc	Unreal ircd		51	0.061
ssh	OpenSSH	4.4	49	0.058
http	DrayTek Vigor 2800-series ADSL router httpd		49	0.058
http	ZNC IRC bouncer httpd	0.090 - 0.096	48	0.057
http	Apache	2.2.14	48	0.057
irc-proxy	psyBNC		47	0.056
ssh	OpenSSH	5.9p1 Debian 5ubuntu1	46	0.055
irc-proxy	psyBNC	2.3.2-6BETA5	43	0.051
http	Apache	2.2.22	43	0.051
ssh	OpenSSH	5.5p1 Debian 6+squeeze2	41	0.049
http	GoAhead-Webs		40	0.048
irc-proxy	ShroudBNC irc-proxy	1.2 revision 1080	39	0.046
http-proxy	Squid http proxy	3.1.16	38	0.045
ftp			37	0.044
http-proxy	3Proxy http proxy		36	0.043
http	Apache	2.2.3	36	0.043
http	Apache	1.3.28	35	0.042
http	PDR-M800	1.0	34	0.04
http	FLPS		33	0.039
http	Icecast streaming media server		32	0.038
directconnect	Direct Connect P2P		31	0.037
shell	w4ck1ng-shell	0.3	30	0.036
http	Boa HTTPd	0.94.14rc21	30	0.036
http	Apache	2.2.15	28	0.033
ssh	OpenSSH	5.1p1 Debian 5	25	0.03
meterpreter	Metasploit meterpreter metsvc		25	0.03
http	Hikvision-Webs		24	0.029
http	Microsoft IIS httpd	7.5	23	0.027
http	Apache	2.2.16	23	0.027
irc-proxy	ShroudBNC irc-proxy	1.2 revision 1045	22	0.026
sip	mini_httpd/1.19 19dec2003		21	0.025
http	Apache	2.2.9	21	0.025
ftp	Microsoft ftpd		21	0.025
ssh	SCS sshd	2.0.13	19	0.023
http	nginx		19	0.023
ssh	AllegroSoft RomSShell sshd	4.61	18	0.021
ftp	Pure-FTPd		18	0.021
http-proxy	Squid http proxy	2.7.STABLE9	17	0.02
http	mini_httpd	1.19 19dec2003	17	0.02
http	Microsoft IIS httpd	5.1	17	0.02
http	Microsoft IIS httpd		17	0.02
http	Intoto httpd	1.0	17	0.02
ssh	OpenSSH	5.8p2_hpn13v11	16	0.019
http	thttpd		16	0.019
sip	thttpd/2.25b 29dec2003		15	0.018
http	GeoVision GeoHttpServer for webcams		15	0.018