Overview of services running on Port 4001 TCP.
~294 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	Cisco router telnetd		134782	45.756
no match	-/-	-/-	107633	36.54
http			12429	4.219
ftp	vsftpd	2.0.8 or later	7392	2.509
telnet	Cisco telnetd		4965	1.686
irc	Dancer ircd		4045	1.373
http	SonicWALL		3361	1.141
chat	AIM or ICQ server		2301	0.781
eggdrop	Eggdrop IRC bot console	1.6.21	2197	0.746
ssl	SSLv3		1742	0.591
donkey	MLDonkey multi-network P2P server		786	0.267
upnp	Portable SDK for UPnP devices	1.3.1	716	0.243
http	lighttpd		688	0.234
http	AIM	1.0	562	0.191
http	SNF	0.1	423	0.144
http	lighttpd	1.4.29	419	0.142
http	lighttpd	1.4.19	408	0.139
mysql	MySQL	5.0.51a-24+lenny5-log	385	0.131
http	Microsoft HTTPAPI httpd	2.0	383	0.13
http	Microsoft IIS httpd	6.0	309	0.105
http	Netwave IP camera http config		242	0.082
irc-proxy	psyBNC	2.3.2-7	217	0.074
telnet			208	0.071
http	Microsoft IIS httpd		208	0.071
mysql	MySQL	4.1.18	191	0.065
http	Apache Tomcat/Coyote JSP engine	1.1	169	0.057
http	Boa HTTPd	0.94.14rc21	159	0.054
http	GoAhead-Webs httpd		153	0.052
http	Apache		148	0.05
vnc	VNC		139	0.047
http	wg_httpd	1.0(based Boa	135	0.046
ssh	OpenSSH	4.3	127	0.043
ssh			122	0.041
http	WangWnagSimpleServer	1.0	113	0.038
remoting	MS .NET Remoting services		106	0.036
ftp	Microsoft ftpd		101	0.034
http	lighttpd	1.4.26	100	0.034
http	Mongrel httpd	1.1.5	98	0.033
irc-proxy	psyBNC	2.3.2-4.6-EuShells.com	97	0.033
http	TBS	R2 UPnP	96	0.033
http	Avtech AVN801 network camera	1.0	93	0.032
http	thttpd		88	0.03
http	Apache	2.2.22	85	0.029
rtsp			81	0.027
http	OracleAS Web Cache 10g	9.0.4.0.0	81	0.027
oracle-tns	Oracle TNS Listener		80	0.027
http	Apache	2.2.3	72	0.024
http	Z-World Rabbit		69	0.023
ice	Internet Communications Engine		67	0.023
http	thttpd	2.24	65	0.022
http	Microsoft IIS httpd	7.5	65	0.022
http-proxy	EZproxy web proxy		64	0.022
http	Ubuntu	lucid UPnP	59	0.02
http	Secure Computing Sidewinder firewall http admin		59	0.02
http	PDR-M800	1.0	59	0.02
http	mini_httpd	1.19 19dec2003	56	0.019
http	Apache	2.2.14	55	0.019
http	Indy	10.0.52	54	0.018
http	Apache	2.2.13	54	0.018
secure-socket	CA Secure Socket Adapter		52	0.018
arcserve	ARCserve Discovery		52	0.018
ssl	TLSv1		51	0.017
http	thttpd	2.19-MX Sep 9 2010	50	0.017
http	Hikvision-Webs		50	0.017
http	nginx	1.0.10	48	0.016
http	Thin	1.3.1	46	0.016
http	thttpd	2.25b	43	0.015
vnc			36	0.012
http-proxy	Squid http proxy	2.7.STABLE9	36	0.012
http	Cisco IOS http config		36	0.012
http	Boa HTTPd	0.94.13	36	0.012
http	uc-httpd	1.0.0	34	0.012
http	Microsoft IIS httpd	7.0	33	0.011
http	ImagiaTek		33	0.011
http	Apache	2.2.9	33	0.011
ftp			33	0.011
http	uTorrent WebUI		31	0.011
http	GeoVision GeoHttpServer for webcams		31	0.011
http	Apache	2.2.15	31	0.011
http	Boa HTTPd	0.93.15	30	0.01
http	Apache	2.2.16	30	0.01
mysql	MySQL	5.0.96-log	29	0.01
http	Net-OS 5.xx UPnP	1.0	29	0.01
http	Jetty	8.0.y.z-SNAPSHOT	28	0.01
citrix-ica	Citrix Metaframe XP ICA		28	0.01
http	Cross Web Server		27	0.009
http	Apache	2.0.53	27	0.009
http	WEBrick httpd	1.3.1	26	0.009
http	Gadspot/Avtech AV787 webcam http config		26	0.009
http	WebFS httpd	1.21	25	0.008
http-proxy	Squid http proxy	3.1.19	25	0.008
http	Microsoft IIS httpd	5.1	25	0.008
http	Mbedthis-Appweb	2.0.4	25	0.008
http	lighttpd	1.4.28	25	0.008
http	GoAhead-Webs		25	0.008
vnc-http	Ultr@VNC		24	0.008
ssl	TLS	1.0	24	0.008
http	Apache	2.2.11	24	0.008
ericom	Ericom PowerTermWebConnect	1.0	24	0.008
http	Apache	2.2.21	23	0.008
http	Apache	1.3.41	23	0.008
bnetd	bnetd open source Blizzard Battlenet server		23	0.008
ssh	OpenSSH	5.1p1 Debian 5	22	0.007
http	Httpd	1.0	22	0.007
http	DVR Systems webcam http interface		22	0.007
http	Apache	2.2.8	22	0.007
http	Apache	2.2.17	22	0.007
upnp	Microsoft Windows UPnP		21	0.007
ssh	OpenSSH	5.3p1 Debian 3ubuntu7	21	0.007
http	MS .NET Remoting httpd		21	0.007
http	Apache	1.3.28	21	0.007
vnc	RealVNC Personal		20	0.007
ssl	Microsoft IIS SSL		20	0.007
http	Microsoft IIS httpd	5.0	20	0.007
irc	Unreal ircd		19	0.006
http	thttpd	2.25b 29dec2003	19	0.006
http	Thin	1.2.7	19	0.006
http	lighttpd	1.4.20	19	0.006
dominoconsole	Lotus Domino Console		19	0.006
directconnect	Direct Connect P2P		19	0.006
openvpn	OpenVPN		18	0.006
http	thin 1.2.11 codename Bat-Shit Crazy		18	0.006
http	SimpleSever		18	0.006
http	OracleAS Web Cache 10g	9.0.4.2.0	18	0.006
ftp	Pure-FTPd		18	0.006
shoutcast-publishing	SHOUTcast publishing port		17	0.006
http	WebLogic httpd		17	0.006
http-proxy	Squid http proxy	2.6.STABLE12	17	0.006
http	GoAhead-Webs embedded httpd		17	0.006
http	D-Link DIR-300 WAP http admin		17	0.006
ftp	Serv-U ftpd	6.4	17	0.006
ssh	OpenSSH	3.7.1p2	16	0.005
soap	gSOAP soap	2.7	16	0.005
http	thttpd	2.24 26oct2003	16	0.005
http	Dispatcher Server V3		16	0.005
ssh	OpenSSH	5.5p1 Debian 6+squeeze1	15	0.005
http	CCcam card sharing system http config		15	0.005