Overview of services running on Port 993 TCP.
~4.8 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	Version	Info	OS	Devicetype	Count	Percent
ssl	SSLv3					4189034	87.319
ssl	TLSv1					538845	11.232
ssl/imap	Cyrus imapd					16126	0.336
psql	Pervasive.SQL Server - Relational Engine					11415	0.238
ssl	Microsoft IIS SSL			Windows		11226	0.234
no match						6970	0.145
ssl	TLS	1.0				3664	0.076
http	SonicWALL				firewall	3389	0.071
http						2959	0.062
chat	AIM or ICQ server					2573	0.054
imap	Microsoft Exchange imapd		refused	Windows		2150	0.045
http	lighttpd	1.4.19				577	0.012
imap	MailEnable imapd			Windows		557	0.012
http	AIM	1.0				338	0.007
imap						293	0.006
imap	Dovecot imapd					292	0.006
http	Microsoft IIS httpd					265	0.006
http	lighttpd	1.4.29				251	0.005
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		182	0.004
imap	Courier Imapd		released 2004			168	0.004
http	thttpd	2.24				168	0.004
http	GoAhead-Webs httpd					167	0.003
smtp	Microsoft Exchange smtpd			Windows		161	0.003
openvpn	OpenVPN					157	0.003
imap	SmarterMail imapd			Windows		153	0.003
imap	hMailServer imapd			Windows		146	0.003
ssl	SSLv2					137	0.003
http	DrcomServer1.0					117	0.002
http	Apache Tomcat/Coyote JSP engine	1.1				106	0.002
smtp						103	0.002
ssh			protocol 1.5			99	0.002
http	Secure Computing Sidewinder firewall http admin				firewall	91	0.002
tcpwrapped	BSD TCP Wrappers		imapd			88	0.002
http	Netwave IP camera http config				webcam	79	0.002
http	Boa HTTPd	0.94.14rc21				75	0.002
ssh	OpenSSH	4.3	protocol 2.0			73	0.002
http	Avtech AVN801 network camera	1.0	UPnP 1.0		webcam	71	0.001
ssl	multi-vendor SSL					70	0.001
http	CCProxy					70	0.001
arcserve	ARCserve Discovery					70	0.001
http	Hikvision-Webs					67	0.001
vnc	VNC		protocol 3.8			63	0.001
smtp	Postfix smtpd					58	0.001
http	thttpd	2.25b				57	0.001
telnet						56	0.001
http	PDR-M800	1.0				56	0.001
ssh	OpenSSH	5.5p1 Debian 6+squeeze2	protocol 2.0	Linux		55	0.001
ssh	OpenSSH	5.3p1 Debian 3ubuntu7	Ubuntu Linux; protocol 2.0	Linux		54	0.001
pop3	MailEnable POP3 Server			Windows		53	0.001
imap	Microsoft Exchange 2007-2010 imapd			Windows		53	0.001
http	Microsoft IIS httpd	6.0		Windows		50	0.001
imap	Binc imapd					48	0.001
ssh	Dropbear sshd	0.52	protocol 2.0	Linux		45	0.001
imap-proxy	nginx imap proxy					43	0.001
http-proxy	Squid http proxy	2.6.STABLE12				43	0.001
http	mini_httpd	1.19 19dec2003				39	0.001
ssh	OpenSSH	5.1p1 Debian 5	protocol 2.0	Linux		37	0.001
imap	Courier Imapd		released 2010			31	0.001
imap	Axigen imapd	8.1.0		Linux		31	0.001
http	Apache					31	0.001
imap	Courier Imapd		released 2008			29	0.001
ftp	Microsoft ftpd			Windows		29	0.001
ssh	OpenSSH	5.9p1 Debian 5ubuntu1	Ubuntu Linux; protocol 2.0	Linux		28	0.001
ftp	vsftpd	2.0.8 or later				28	0.001
http	Apache	2.2.14				27	0.001
smtp	Microsoft ESMTP	6.0.3790.4675		Windows		26	0.001
ssh	OpenSSH	5.4p1	FreeBSD 20100308; protocol 2.0	FreeBSD		25	0.001
ssh	OpenSSH	5.3	protocol 2.0			24	0.001
socks-proxy	CCProxy socks proxy		unauthorized			24	0.001
ftp						24	0.001
ssh	OpenSSH	5.8p2_hpn13v11	FreeBSD 20110503; protocol 2.0	FreeBSD		23	0.0
ssh	OpenSSH	5.2	protocol 2.0			23	0.0
http-proxy	Squid http proxy	2.7.STABLE9				23	0.0
ftp	WS FTPd	5.0.5		Windows		22	0.0
tcpwrapped	BSD TCP Wrappers		imaps			21	0.0
imap	Microsoft Exchange Server 2003 imapd	6.5.7638.1		Windows		21	0.0
http	uTorrent WebUI			Windows		21	0.0
http	Gadspot/Avtech AV787 webcam http config				webcam	21	0.0
ssh	OpenSSH	5.5p1 Debian 6	protocol 2.0	Linux		20	0.0
http	Apache	2.2.14	(Ubuntu)			20	0.0