Overview of services running on Port 543 TCP.
~14 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	Info	OS	Devicetype	Count	Percent
chat	AIM or ICQ server					2280	16.033
http						2009	14.127
ssl	SSLv3					1921	13.508
no match						1602	11.265
http	SonicWALL				firewall	752	5.288
klogin	HP-UX kerberized rlogin		disabled	HP-UX		616	4.332
imap	Courier Imapd		released 2011			598	4.205
klogin	AIX kerberized rlogin			AIX		469	3.298
http	lighttpd	1.4.19				436	3.066
klogin	Kerberized rlogin					368	2.588
http	Apache	2.2.8	PHP/5.2.4-2ubuntu5.19 with Suhosin-Patch			363	2.553
http	Router					271	1.906
http	Microsoft IIS httpd					205	1.442
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		144	1.013
http	GoAhead-Webs httpd					118	0.83
ssh			protocol 1.5			100	0.703
http	lighttpd	1.4.29				98	0.689
http	AIM	1.0				95	0.668
ssh	OpenSSH	5.8	protocol 2.0			76	0.534
http	thttpd	2.24				71	0.499
klogin	HP-UX kerberized rlogin			HP-UX		61	0.429
telnet						56	0.394
login	Tru64 Unix logind			Tru64 UNIX		56	0.394
arcserve	ARCserve Discovery					55	0.387
ssl	TLS	1.0				51	0.359
vnc	VNC		protocol 3.8			46	0.323
imap	Courier Imapd		released 2010			40	0.281
http	Boa HTTPd	0.94.14rc21				39	0.274
http	Apache Tomcat/Coyote JSP engine	1.1				31	0.218
ftp						28	0.197
http	thttpd	2.25b				23	0.162
http-proxy	Squid http proxy	2.7.STABLE9				23	0.162
http	Apache		SSL-only mode			23	0.162
http	Apache	2.2.8	(Ubuntu) PHP/5.2.4-2ubuntu5.19 with Suhosin-Patch			22	0.155
http-proxy	Squid http proxy	2.6.STABLE12				20	0.141
ftp	Microsoft ftpd			Windows		20	0.141