Overview of services running on Port 161 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
http	SonicWALL				firewall	3670	28.333
http						2528	19.517
chat	AIM or ICQ server					990	7.643
no match						895	6.91
http	AIM	1.0				660	5.095
http-proxy	CCProxy http proxy		unauthorized	Windows		450	3.474
http	lighttpd	1.4.19				401	3.096
smux	Linux SNMP multiplexer			Linux		281	2.169
http	Netwave IP camera http config				webcam	201	1.552
http	lighttpd	1.4.29				189	1.459
http	Apache	2.2.22	(Ubuntu)			158	1.22
http	Microsoft IIS httpd	6.0		Windows		135	1.042
http	DrcomServer1.0					119	0.919
http	Apache Tomcat/Coyote JSP engine	1.1				101	0.78
ssh			protocol 1.5			78	0.602
http	GoAhead-Webs					77	0.594
http	Avtech AVN801 network camera	1.0	UPnP 1.0		webcam	73	0.564
http	thttpd	2.24 26oct2003				70	0.54
http	Microsoft IIS httpd	7.5		Windows		67	0.517
http	mini_httpd	1.19 19dec2003				62	0.479
telnet						54	0.417
http	PDR-M800	1.0				39	0.301
http	uc-httpd	1.0.0				37	0.286
http	Boa HTTPd	0.94.14rc21				36	0.278
http	DD-WRT milli_httpd					31	0.239
http	thttpd	2.25b 29dec2003				29	0.224
http	Apache					29	0.224
http	Microsoft IIS httpd	7.0		Windows		26	0.201
http	GoAhead-Webs embedded httpd					24	0.185
http	Apache	2.2.3	(CentOS)			24	0.185
http	Apache		SSL-only mode			23	0.178
http	Cross Web Server					22	0.17
http	thttpd		Panasonic BB-HCM511 IP camera http config			21	0.162
http	Microsoft IIS httpd					21	0.162