Overview of services running on Port 256 TCP.
~12 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
ssh	Dropbear sshd	0.51	protocol 2.0	Linux		5488	45.359
no match						1806	14.927
chat	AIM or ICQ server					1468	12.133
fw1-topology	Checkpoint FireWall-1 Topology				firewall	1401	11.579
http	lighttpd	1.4.19				380	3.141
http						323	2.67
http	Microsoft IIS httpd					161	1.331
fw1-secureremote	Checkpoint Firewall1 SecureRemote				firewall	136	1.124
http	Microsoft HTTPAPI httpd	2.0	SSDP/UPnP	Windows		109	0.901
ssh			protocol 1.5			88	0.727
telnet						47	0.388
ssh	OpenSSH	4.3	protocol 2.0			44	0.364
arcserve	ARCserve Discovery					31	0.256
http	Boa HTTPd	0.94.14rc21				30	0.248
ftp						29	0.24
vnc	VNC		protocol 3.8			28	0.231
http	MiniServ	1.580	Webmin httpd			20	0.165