Overview of services running on Port 2303 UDP.
~32 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						22495	70.181
http	lighttpd	1.4.19				9336	29.127
netbios-ssn						88	0.275
socks5						77	0.24