Overview of services running on Port 37 UDP.
~75 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
time			32 bits			37312	49.474
no match						28782	38.164
http	lighttpd	1.4.19				8885	11.781
netbios-ssn						254	0.337
socks5						90	0.119
time			64 bits			49	0.065