Overview of services running on Port 42 TCP.
~57 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
wins	Microsoft Windows Wins	36039	62.684
no match	-/-	12219	21.253
donkey	MLDonkey multi-network P2P server	3609	6.277
chat	AIM or ICQ server	1633	2.84
ssh	OpenSSH	1571	2.733
ftp	ProFTPD	599	1.042
http	lighttpd	327	0.569
http		283	0.492
http	Microsoft IIS httpd	149	0.259
telnet	Polycom VoIP phone debug telnetd	126	0.219
ssh		93	0.162
http	Microsoft HTTPAPI httpd	84	0.146
ftp		58	0.101
ftp	Microsoft ftpd	55	0.096
telnet		52	0.09
ftp	FileZilla ftpd	41	0.071
ssh	Dropbear sshd	35	0.061
ssh	Kojoney SSH honeypot	34	0.059
vnc	VNC	29	0.05
http	thttpd	29	0.05
http	Boa HTTPd	24	0.042
ssh	MikroTik RouterOS sshd	23	0.04
http	nginx	23	0.04
mysql	MySQL	19	0.033
ftp	Pure-FTPd	17	0.03
smtp	Microsoft ESMTP	16	0.028
smtp	Exim smtpd	14	0.024
telnet	Linux telnetd	13	0.023
ftp	vsftpd	12	0.021
ftp	MikroTik router ftpd	11	0.019
smtp	Microsoft Exchange smtpd	10	0.017
smtp		10	0.017
ftp	Serv-U ftpd	10	0.017
directconnect	Direct Connect P2P	10	0.017
arcserve	ARCserve Discovery	10	0.017