Overview of services running on Port 26 TCP.
~721 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
smtpExim smtpd60119983.363
smtp272493.778
no match-/-217953.022
smtpPostfix smtpd104101.443
smtpMicrosoft ESMTP92671.285
http92631.284
smtpSendmail70760.981
smtpMailEnable smptd51990.721
sshOpenSSH39210.544
httpSonicWALL36270.503
smtpMicrosoft Exchange smtpd24630.342
chatAIM or ICQ server21870.303
http-proxySquid http proxy12860.178
httpApache10290.143
arcserveARCserve Discovery9930.138
smtpSymantec Enterprise Security manager smtpd9610.133
smtpIMail NT-ESMTP9200.128
sslSSLv39180.127
httplighttpd9020.125
telnetQDX 6000 Console Utility7140.099
sshDropbear sshd7050.098
httpAIM6180.086
ftpMicrosoft ftpd5130.071
smtpAlt-N MDaemon mail server4540.063
sshMikroTik RouterOS sshd4250.059
telnet2920.04
httpMicrosoft IIS httpd2660.037
telnetIntel telnetd2620.036
httpa_632400.033
telnetK80 Console Utility2310.032
smtpCommunigate Pro SMTP2190.03
smtpAxigen smtpd1920.027
smtprblsmtpd wrapped smtpd1860.026
smtpKerio Connect smtpd1730.024
ftpServ-U ftpd1560.022
ssh1510.021
ftp1460.02
smtpRaidenMAILD smtpd1440.02
smtpMDaemon smtpd1350.019
telnetDraytek Vigor ADSL router telnetd1330.018
smtpLotus Domino smtpd1260.017
smtpIceWarp smtpd1200.017
ftpProFTPD1120.016
ftpFileZilla ftpd1100.015
smtpMicrosoft Exchange 2010 smtpd1090.015
httpMicrosoft HTTPAPI httpd1070.015
httpGoAhead-Webs httpd1050.015
httpNetwave IP camera http config1040.014
smtpBarracuda Networks Spam Firewall smtpd1020.014
smtpRockliffe MailSite980.014
smtpMailEnable Enterprise smptd920.013
telnetLinux telnetd880.012
smtpKerio MailServer840.012
smtpSurgemail smtpd830.012
httpApache Tomcat/Coyote JSP engine810.011
httpBoa HTTPd720.01
smtpAllworx 6x VoIP phone smtpd690.01
sshSCS sshd680.009
ftpvsftpd680.009
httpAvtech AVN801 network camera630.009
smtpMerak Mail Server smtpd610.008
httpthttpd550.008
smtpXMail SMTP server540.007
httpHikvision-Webs520.007
vncVNC490.007
pop3hMailServer pop3d490.007
smtpArGoSoft Mail Server Pro470.007
smtpCisco PIX sanitized smtpd420.006
httpPDR-M800420.006
smtpCode-Crafters Ability Mail Server smtpd390.005
smtpNovell GroupWise380.005
httpCCProxy360.005
smtp-proxyESET NOD32 anti-virus smtp proxy340.005
napsterWinMX or Lopster Napster P2P client320.004
ftpPure-FTPd320.004
smtpTobit David.fx smtpd300.004
httpmini_httpd300.004
ftpMikroTik router ftpd300.004
ftpDreambox ftpd290.004
smtp-proxyUserGate smtp proxy280.004
sslMicrosoft IIS SSL270.004
mysqlMySQL250.003
httpnginx250.003
ftpSynology DiskStation NAS ftpd240.003
httpGoAhead-Webs230.003
sshBitvise WinSSHD220.003
smtpSymantec Messaging Gateway smtpd220.003
smtpCisco IronPort C160 firewall smtpd220.003
telnetCisco 1721 router telnetd200.003
sshSunSSH200.003
httpMbedthis-Appweb200.003
telnetNetopia ADSL router telnetd170.002
sshWeOnlyDo sshd160.002
httpCross Web Server160.002
smtpPowerMTA smtpd150.002
httpGadspot/Avtech AV787 webcam http config150.002
smtpMailMarshal140.002
ftpDrayTek Vigor router ftpd140.002
socks-proxyCCProxy socks proxy130.002
smtp-proxyScalix smtp relay130.002
smtpJAMES smtpd130.002
httpuTorrent WebUI130.002
httpuc-httpd130.002
httpDVR Systems webcam http interface130.002
ftpCode-Crafters Ability ftpd130.002
telnetslush telnetd120.002
sshCisco SSH120.002
mongodbMongoDB120.002
http-proxyF5 BIG-IP load balancer http proxy120.002
httpGeoVision GeoHttpServer for webcams120.002
ftpGene6 ftpd120.002
smtpIA Mailserver smtpd110.002
smtpArGoSoft Mail Server Freeware110.002
httpAllegro RomPager110.002
httpAIM HTTP110.002
smtpWebwasher CSM Suite smtpd100.001
smtpFirstClass SMTP server100.001
openvpnOpenVPN100.001