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	Count	Percent
http	SonicWALL	3670	28.333
http		2557	19.741
chat	AIM or ICQ server	990	7.643
no match	-/-	895	6.91
http	AIM	660	5.095
http	lighttpd	647	4.995
http	Apache	482	3.721
http-proxy	CCProxy http proxy	450	3.474
smux	Linux SNMP multiplexer	281	2.169
http	Microsoft IIS httpd	266	2.054
http	Netwave IP camera http config	201	1.552
http	thttpd	134	1.035
http	DrcomServer1.0	119	0.919
http	Apache Tomcat/Coyote JSP engine	106	0.818
ssh		79	0.61
http	GoAhead-Webs	78	0.602
http	Avtech AVN801 network camera	73	0.564
http	mini_httpd	63	0.486
http	Boa HTTPd	63	0.486
telnet		54	0.417
ssh	OpenSSH	50	0.386
http	PDR-M800	39	0.301
http	uc-httpd	37	0.286
http	DD-WRT milli_httpd	35	0.27
http	nginx	29	0.224
http	GoAhead-Webs embedded httpd	24	0.185
http	Cross Web Server	22	0.17
vnc	VNC	21	0.162
ftp	Microsoft ftpd	17	0.131
http	Hikvision-Webs	15	0.116
ftp	FileZilla ftpd	15	0.116
ftp		15	0.116
http	Mbedthis-Appweb	14	0.108
http	Datum	14	0.108
http	uTorrent WebUI	12	0.093
http-proxy	Squid http proxy	12	0.093
http	Microsoft HTTPAPI httpd	12	0.093
http	CCcam card sharing system http config	12	0.093
smtp	Microsoft Exchange smtpd	11	0.085
http-proxy	MikroTik http proxy	11	0.085
http-proxy	F5 BIG-IP load balancer http proxy	11	0.085
http	LuCI Lua http config	11	0.085
http	GeoVision GeoHttpServer for webcams	11	0.085
ftp	Serv-U ftpd	11	0.085
ssl	TLS	10	0.077
http	RemotelyAnywhere remote PC management httpd	10	0.077
http	Mobotix Camera http config	10	0.077
http	Gadspot/Avtech AV787 webcam http config	10	0.077
ftp	Pure-FTPd	10	0.077