Overview of services running on Port 53 TCP.
~7.99 Million 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
domainISC BIND344817743.168
domaindnsmasq173929421.774
domain125212815.675
domainOpenDNS Updater7098748.887
domainMicrosoft DNS4263475.337
socks4Connection rejected or failed; connections possibly ok1745522.185
no match-/-946251.185
domainMikroTik RouterOS named or OpenDNS Updater476250.596
domainPowerDNS368390.461
domainNLNet Labs Unbound133880.168
domainpdnsd126990.159
domainNortel Contivity firewall DNS92980.116
domainFortinet FortiGate named56950.071
secure-socketCA Secure Socket Adapter28410.036
chatAIM or ICQ server23400.029
sshOpenSSH22690.028
socks4Connection failed; ident required19770.025
domainv6rev17830.022
socks4Connection ok8670.011
socks4Connection failed; username required7640.01
httpMicrosoft IIS httpd5920.007
http5030.006
httplighttpd3970.005
domainMyDNS3680.005
domainD-Link DIR-300 WAP named3670.005
httpMicrosoft HTTPAPI httpd1780.002
domainMaraDNS1460.002
domainIncognito DNS Commander1440.002
vtunVtun Virtual Tunnel1320.002
ssh1230.002
openvpnOpenVPN1100.001
sshDropbear sshd930.001
telnet650.001
ftpMicrosoft ftpd650.001
vncVNC580.001
ftp560.001
httpBoa HTTPd490.001
mongodbMongoDB480.001
ftpServ-U ftpd430.001
domainOzymanDNS DNS tunnel410.001
sshBitvise WinSSHD380.0
httpnginx380.0
ftpFileZilla ftpd340.0
telnetLinux telnetd330.0
smtp300.0
ftpProFTPD270.0
telnetAllied Telesis x900-series switch telnetd260.0
smtpPostfix smtpd260.0
smtpMicrosoft Exchange smtpd260.0
mysqlMySQL250.0
smtpMicrosoft ESMTP240.0
arcserveARCserve Discovery240.0
sshSCS sshd180.0
ftpPure-FTPd180.0
sslTLS160.0
ftpvsftpd160.0
directconnectDirect Connect P2P160.0
audioworksAudioWorks sound server160.0
socks5140.0
minecraftMinecraft game server140.0
vncRealVNC Enterprise130.0
smtpAlt-N MDaemon mail server110.0
domainEdimax BR-6104K router named110.0
vncRealVNC Personal100.0