Overview of services running on Port 620 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	3521	27.849
http		2764	21.862
chat	AIM or ICQ server	1579	12.489
no match	-/-	894	7.071
http	AIM	681	5.386
http	lighttpd	643	5.086
http	Apache	338	2.673
http	Microsoft IIS httpd	270	2.136
http	Netscape FastTrack Administrator	245	1.938
http	thttpd	126	0.997
http	DrcomServer1.0	110	0.87
ssh		89	0.704
http	GoAhead-Webs	83	0.656
http	Apache Tomcat/Coyote JSP engine	80	0.633
http	Netwave IP camera http config	76	0.601
http	Avtech AVN801 network camera	68	0.538
telnet		53	0.419
ssh	OpenSSH	53	0.419
http	PDR-M800	49	0.388
http	Boa HTTPd	47	0.372
vnc	VNC	38	0.301
http-proxy	Squid http proxy	33	0.261
http	mini_httpd	24	0.19
http	Hikvision-Webs	23	0.182
http	Gadspot/Avtech AV787 webcam http config	22	0.174
http	Mbedthis-Appweb	20	0.158
http	uc-httpd	19	0.15
http	nginx	18	0.142
http	uTorrent WebUI	17	0.134
smtp	Microsoft ESMTP	15	0.119
mysql	MySQL	15	0.119
http-proxy	F5 BIG-IP load balancer http proxy	14	0.111
http	Cross Web Server	14	0.111
directconnect	Direct Connect P2P	14	0.111
ftp	Microsoft ftpd	13	0.103
http	DVR Systems webcam http interface	12	0.095
http	AIM HTTP	12	0.095
ftp		12	0.095
http	GeoVision GeoHttpServer for webcams	11	0.087
ftp	ProFTPD	11	0.087
ftp	vsftpd (before 2.0.8) or WU-FTPD	10	0.079
ftp	Serv-U ftpd	10	0.079
ftp	FileZilla ftpd	10	0.079