Overview of services running on Port 19 TCP.
~148 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
chargen			116884	78.509
http			9506	6.385
no match	-/-	-/-	8321	5.589
http	SonicWALL		3612	2.426
chat	AIM or ICQ server		2341	1.572
chargen	xinetd chargen		1064	0.715
chargen	Linux chargen		812	0.545
ssl	SSLv3		694	0.466
ftp	Microsoft ftpd		603	0.405
http	AIM	1.0	574	0.386
http	lighttpd	1.4.29	419	0.281
http	lighttpd	1.4.19	412	0.277
chargen	SunOS chargen		328	0.22
chargen	Lantronix chargen	1.0	129	0.087
ssh	OpenSSH	5.5	128	0.086
http	Microsoft IIS httpd	6.0	118	0.079
http	GoAhead-Webs httpd		109	0.073
ftp			101	0.068
ssh			100	0.067
http	Microsoft IIS httpd		94	0.063
http	Microsoft HTTPAPI httpd	2.0	85	0.057
http	Apache Tomcat/Coyote JSP engine	1.1	77	0.052
http	Netwave IP camera http config		74	0.05
http	Avtech AVN801 network camera	1.0	66	0.044
ssh	OpenSSH	4.3	65	0.044
telnet			56	0.038
http	Apache		49	0.033
http	PDR-M800	1.0	47	0.032
vnc	VNC		44	0.03
http	Boa HTTPd	0.94.14rc21	33	0.022
http	Apache	2.2.3	32	0.021
http-proxy	Squid http proxy	2.6.STABLE12	31	0.021
http	Apache	2.2.14	30	0.02
telnet	BSD-derived telnetd		29	0.019
ftp	vsftpd	2.0.8 or later	29	0.019
http	mini_httpd	1.19 19dec2003	28	0.019
ssh	OpenSSH	5.1p1 Debian 5	26	0.017
http-proxy	Squid http proxy	2.7.STABLE9	26	0.017
ftp	Pure-FTPd		24	0.016
dominoconsole	Lotus Domino Console		24	0.016
http	Microsoft IIS httpd	7.5	23	0.015
http	Hikvision-Webs		23	0.015
http	thttpd	2.25b	22	0.015
http	thttpd		21	0.014
ftp	Synology DiskStation NAS ftpd		19	0.013
http	Mbedthis-Appweb	2.0.4	18	0.012
http	Apache	2.2.16	18	0.012
ssh	OpenSSH	5.5p1 Debian 6+squeeze2	17	0.011
http	uc-httpd	1.0.0	17	0.011
http	GoAhead-Webs		17	0.011
ssh	OpenSSH	5.2	16	0.011
ssh	OpenSSH	3.9p1	15	0.01
http	DVR Systems webcam http interface		15	0.01
http	Apache	2.2.15	15	0.01