Overview of services running on Port 42 UDP.
~29 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	Count	Percent
no match	-/-	20634	71.13
http	lighttpd	8200	28.267
netbios-ssn		78	0.269
socks5		61	0.21
dominoconsole	Lotus Domino Console	17	0.059
http		11	0.038