Overview of services running on Port 43 TCP.
~8 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
no match						3579	41.928
chat	AIM or ICQ server					1707	19.998
http	lighttpd	1.4.29				487	5.705
http						486	5.694
http	lighttpd	1.4.19				400	4.686
whois	gwhois		Uses whois.arin.net:43			187	2.191
http	Microsoft IIS httpd					180	2.109
telnet	Linux telnetd			Linux		126	1.476
irr	Merit Internet Routing Registry					95	1.113
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		95	1.113
ssh			protocol 1.5			90	1.054
ftp	Microsoft ftpd			Windows		82	0.961
telnet						70	0.82
vnc	VNC		protocol 3.8			39	0.457
http	Boa HTTPd	0.94.14rc21				27	0.316
ftp						26	0.305
http	lighttpd					22	0.258
whois	Public Interest Registry whois server					20	0.234
http	thttpd	2.25b				20	0.234
http	thttpd					20	0.234