Overview of services running on Port 515 TCP.
~547 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
printer		319978	58.397
printer	Panasonic mfpscdl.exe service	82252	15.011
no match	-/-	34905	6.37
printer	Microsoft lpd	32818	5.989
printer	lpd	31010	5.659
http		11440	2.088
printer	Lexmark lpd service	8952	1.634
printer	LPRng	4266	0.779
http	SonicWALL	4033	0.736
chat	AIM or ICQ server	2634	0.481
printer	Solaris lpd	1920	0.35
http	Apache	1343	0.245
ipp	CUPS	1306	0.238
printer	Sun Solaris lpd	946	0.173
http	lighttpd	916	0.167
http	AIM	714	0.13
ssl	SSLv3	710	0.13
printer	print server	626	0.114
ssh	OpenSSH	533	0.097
printer	Linux lpd	452	0.082
ssh	SCS sshd	419	0.076
printer	BSD lpd	406	0.074
http	thttpd	326	0.059
http	Microsoft IIS httpd	324	0.059
http	mini_httpd	296	0.054
hp-radia	HP Radia configuration server	196	0.036
http	Microsoft HTTPAPI httpd	175	0.032
printer	lpsched	167	0.03
ssh	Dropbear sshd	155	0.028
http	GoAhead-Webs httpd	154	0.028
napster	WinMX or Lopster Napster P2P client	145	0.026
http	a_63	140	0.026
printer	Wyse Winterm 1200 LE terminal lpd	138	0.025
http	Apache Tomcat/Coyote JSP engine	126	0.023
printer	AIX lpd	124	0.023
printer	BSD/Linux lpd	123	0.022
http	DrcomServer1.0	121	0.022
vnc	VNC	120	0.022
http	Boa HTTPd	119	0.022
http-proxy	Squid http proxy	118	0.022
http	Netwave IP camera http config	112	0.02
http	Avtech AVN801 network camera	108	0.02
ssh		107	0.02
arcserve	ARCserve Discovery	106	0.019
printer	RPM Print Manager lpd	101	0.018
http	Hikvision-Webs	81	0.015
http	PDR-M800	63	0.011
telnet		62	0.011
audioworks	AudioWorks sound server	47	0.009
mysql	MySQL	43	0.008
niprint	Network Instruments NIPrint network analyzer	40	0.007
ftp	FileZilla ftpd	38	0.007
directconnect	Direct Connect P2P	35	0.006
ftp	Microsoft ftpd	34	0.006
zabbix	Zabbix Monitoring System	33	0.006
ftp	ProFTPD	33	0.006
ftp	vsftpd	32	0.006
http	Mbedthis-Appweb	29	0.005
http	Gadspot/Avtech AV787 webcam http config	29	0.005
ftp		29	0.005
http	uc-httpd	27	0.005
http	nginx	25	0.005
http	uTorrent WebUI	24	0.004
vnc	RealVNC Enterprise	23	0.004
smtp	Microsoft ESMTP	23	0.004
smtp		23	0.004
psql	Pervasive.SQL Server - Relational Engine	23	0.004
http	GeoVision GeoHttpServer for webcams	23	0.004
ftp	Serv-U ftpd	22	0.004
vnc	RealVNC Personal	21	0.004
http	DVR Systems webcam http interface	20	0.004
ftp	Pure-FTPd	18	0.003
minecraft	Minecraft game server	17	0.003
vnc		15	0.003
smtp	Microsoft Exchange smtpd	15	0.003
http	Cross Web Server	15	0.003
http-proxy	F5 BIG-IP load balancer http proxy	14	0.003
http	GoAhead-Webs	14	0.003
http	http server 1.0	13	0.002
http	MS-SDK-HttpServer	12	0.002
http	Jetty	12	0.002
http	AIM HTTP	12	0.002
rtsp		11	0.002
printer	VSE lpd	11	0.002
http	Allegro RomPager	11	0.002
ssl	TLS	10	0.002
http	TeleEye	10	0.002
http	RemotelyAnywhere remote PC management httpd	10	0.002