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	Count	Percent
chat	AIM or ICQ server		2280	16.033
http			2015	14.169
ssl	SSLv3		1921	13.508
no match	-/-	-/-	1602	11.265
http	SonicWALL		752	5.288
klogin	HP-UX kerberized rlogin		677	4.761
imap	Courier Imapd		638	4.486
klogin	AIX kerberized rlogin		471	3.312
http	lighttpd	1.4.19	436	3.066
http	Apache	2.2.8	387	2.721
klogin	Kerberized rlogin		368	2.588
http	Router		271	1.906
http	Microsoft IIS httpd		205	1.442
http	Microsoft HTTPAPI httpd	2.0	144	1.013
http	GoAhead-Webs httpd		118	0.83
ssh			102	0.717
http	lighttpd	1.4.29	98	0.689
http	AIM	1.0	95	0.668
ssh	OpenSSH	5.8	76	0.534
http	thttpd	2.24	71	0.499
vnc	VNC		63	0.443
telnet			56	0.394
login	Tru64 Unix logind		56	0.394
arcserve	ARCserve Discovery		55	0.387
ssl	TLS	1.0	51	0.359
http	Boa HTTPd	0.94.14rc21	39	0.274
http	Apache Tomcat/Coyote JSP engine	1.1	31	0.218
http	Apache		28	0.197
ftp			28	0.197
http	thttpd	2.25b	23	0.162
http-proxy	Squid http proxy	2.7.STABLE9	23	0.162
http	Apache	2.2.3	23	0.162
ssh	OpenSSH	4.3	20	0.141
http-proxy	Squid http proxy	2.6.STABLE12	20	0.141
ftp	Microsoft ftpd		20	0.141
smtp			19	0.134
login			19	0.134
http	Hikvision-Webs		18	0.127
ssl	Microsoft IIS SSL		17	0.12
smtp	Postfix smtpd		16	0.113
http	TP-LINK WA500G WAP http config		16	0.113
http	thttpd		16	0.113
http	Avtech AVN801 network camera	1.0	16	0.113
ftp	Pure-FTPd		16	0.113
http	Apache	2.2.14	15	0.105