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 Count Percent
chargen11688478.509
http95066.385
no match-/-83215.589
httpSonicWALL36122.426
chatAIM or ICQ server23411.572
chargenxinetd chargen10640.715
httplighttpd8650.581
chargenLinux chargen8120.545
sslSSLv36940.466
ftpMicrosoft ftpd6060.407
httpAIM5740.386
sshOpenSSH4320.29
chargenSunOS chargen3280.22
httpApache2750.185
httpMicrosoft IIS httpd2610.175
chargenLantronix chargen1290.087
httpGoAhead-Webs httpd1090.073
ftp1010.068
ssh1000.067
httpMicrosoft HTTPAPI httpd850.057
httpApache Tomcat/Coyote JSP engine770.052
httpNetwave IP camera http config740.05
http-proxySquid http proxy720.048
httpAvtech AVN801 network camera660.044
ftpProFTPD640.043
httpthttpd630.042
telnet560.038
ftpFileZilla ftpd520.035
httpBoa HTTPd510.034
httpPDR-M800470.032
vncVNC440.03
ftpMikroTik router ftpd330.022
ftpvsftpd320.021
telnetBSD-derived telnetd290.019
httpmini_httpd290.019
mysqlMySQL250.017
ftpPure-FTPd240.016
dominoconsoleLotus Domino Console240.016
httpHikvision-Webs230.015
sshDropbear sshd220.015
httpnginx220.015
ftpSynology DiskStation NAS ftpd190.013
ftpServ-U ftpd190.013
httpMbedthis-Appweb180.012
httpuc-httpd170.011
httpGoAhead-Webs170.011
httpDVR Systems webcam http interface150.01
sftpProFTPD mod_sftp140.009
httpuTorrent WebUI140.009
httpAIM HTTP130.009
sshSCS sshd120.008
smtpMicrosoft Exchange smtpd120.008
openvpnOpenVPN120.008
http-proxyF5 BIG-IP load balancer http proxy110.007
httpCross Web Server110.007
[\]^_`abcdefghijklmnopqrstuvwxyz{|}!"#$%&'()*+,-./0123456789"0123456789110.007
smtpExim smtpd100.007
jetdirectJetDirect100.007
httpRemotelyAnywhere remote PC management httpd100.007
ftpNetgear broadband router or ZyXel VoIP adapter ftpd100.007