Overview of services running on Port 631 TCP.
~711 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	Digifort Enterprise 6.5 httpd	299302	42.06
ipp	CUPS	207917	29.218
http		27789	3.905
http	Virata-EmWeb	22178	3.117
http	HP-ChaiSOE	20807	2.924
ipp	Web-Server httpd	15267	2.145
http	HTTP	7390	1.038
http	HP JetDirect printer webadmin	7207	1.013
ipp	Xerox Phaser 3500	7195	1.011
http	Apache	6191	0.87
http	thttpd	5534	0.778
ipp	Canon printer http config	5347	0.751
ipp	Xerox WorkCentre IPP	5273	0.741
http	ActionTec TR-069 remote access	4950	0.696
http	Allegro RomPager	4530	0.637
http	SonicWALL	3752	0.527
http	Konica Minolta PageScope Web Connection httpd	3725	0.523
http	Debut embedded httpd	3693	0.519
http	Lexmark printer http config	3629	0.51
soap	gSOAP soap	3027	0.425
ipp	Epson ippd	2438	0.343
http	Web-Server	2280	0.32
chat	AIM or ICQ server	2238	0.314
http	HP Officejet Pro 8500 A910 printer http config	2036	0.286
http	JC-SHTTPD	2010	0.282
http	JC-HTTPD	1988	0.279
http	HP Jetdirect httpd	1821	0.256
http	HP JetDirect Card in a LaserJet printer	1498	0.211
http	HP Officejet Pro 8600 printer http config	1454	0.204
http	Canon printer web interface	1424	0.2
http	HP Officejet 6500 E710n-z printer http config	1263	0.177
http	lighttpd	1205	0.169
no match	-/-	1101	0.155
http	HP Photosmart D110 series printer http config	1078	0.151
http	Agranat-EmWeb	1068	0.15
http	HP LaserJet P1606 http config	1066	0.15
http	HP Photosmart 5510 series printer http config	857	0.12
http	HP Photosmart B110 series printer http config	814	0.114
http	Kyocera FS-3900DN printer http config	784	0.11
http	HP Photosmart Plus B210 series printer http config	764	0.107
http	HP Deskjet 3050A series printer http config	758	0.107
http	AIM	657	0.092
http	Lexmark printer webadmin	634	0.089
http	Octoshape P2P streaming web service	599	0.084
ipp	Thecus N5200 IPP	566	0.08
http	HP Officejet 6500 E710a-f printer http config	551	0.077
http	HP Photosmart 7510 series printer http config	541	0.076
http	HP Photosmart Prem C310 series printer http config	472	0.066
http	KM-httpd	461	0.065
http	GoAhead-Webs httpd	424	0.06
http	HP Photosmart 6510 series printer http config	423	0.059
http	Microsoft IIS httpd	420	0.059
http	HP Photosmart Prem C410 series printer http config	392	0.055
http	PRINT_SERVER WEB	373	0.052
http	Kyocera IB-21E printer http config	353	0.05
http	HP Officejet 7500 E910 printer http config	337	0.047
http	HP HTTP Server	306	0.043
http	HP Deskjet 3070 series printer http config	298	0.042
http	ZOT-PS-47	289	0.041
http	print server http config	285	0.04
http	Rapid Logic	278	0.039
http	Xerox WorkCentre http config	259	0.036
http	Xerox MicroServer httpd	235	0.033
ipp	ZOT-PS-35 print server	227	0.032
ipp	ZOT-PS-30 print server	222	0.031
http	HP Officejet 6700 printer http config	212	0.03
http	Webserver	208	0.029
http	Dell 1815dn printer http config	204	0.029
http	Apache Tomcat/Coyote JSP engine	202	0.028
http	HP Photosmart 5510d series printer http config	184	0.026
http	Konica Minolta 350 printer http config	175	0.025
http	Spyglass MicroServer	174	0.024
http	HP Officejet Pro 8100 printer http config	161	0.023
http	Hawking Print Server httpd	159	0.022
http	Xerox WorkCentre Pro httpd	153	0.022
http	Toshiba e-STUDIO printer http config	142	0.02
http	Konica Minolta 250 printer http config	139	0.02
http	PRINT_SERVER WEB 1.0	132	0.019
http	Konica Minolta bizhub 423 printer http config	130	0.018
http	DrcomServer1.0	120	0.017
ipp	ZOT-PS-39 print server	111	0.016
http	Avtech AVN801 network camera	109	0.015
http	Konica Minolta 200 printer http config	106	0.015
http	HP Officejet 6600 printer http config	105	0.015
http	HP Officejet 4620 series printer http config	99	0.014
ssh		94	0.013
http	Konica Minolta bizhub printer http config	89	0.013
http	GoAhead-Webs embedded httpd	89	0.013
ssh	OpenSSH	82	0.012
http	Jetty	82	0.012
http	Boa HTTPd	79	0.011
http	Netwave IP camera http config	77	0.011
http	Kyocera IB-21G printer http config	76	0.011
http	Zebra ZTC 105SL label printer http config	75	0.011
http	Dell Laser Printer W5300 http config	75	0.011
ipp	Kyocera Mita KM-1530 IPP	72	0.01
http	ZOT-PS-30	72	0.01
http	Toshiba e-STUDIO 233 copier/printer/fax http config	72	0.01
http	Konica Minolta 222 printer http config	69	0.01
http	Konica Minolta 282 printer http config	65	0.009
http	EWS-NIC3	65	0.009
http	Zero One Technology ZOT-PS-19 httpd	55	0.008
http	Konica Minolta 362 printer http config	55	0.008
http	ZOT-PS-35	54	0.008
http	HP Photosmart eStn C510 series printer http config	54	0.008
vnc	VNC	53	0.007
http	Oki Data C5200n printer http config	53	0.007
telnet		51	0.007
http	mini_httpd	51	0.007
http	Ricoh Aficio MP C4000 http config	50	0.007
http-proxy	Squid http proxy	49	0.007
http	PDR-M800	48	0.007
http	EWS-NIC	44	0.006
http	ZOT-PS-39	41	0.006
http	Hikvision-Webs	40	0.006
http	Konica Minolta PageScope Web Connection	39	0.005
http	Web Server	38	0.005
http	ZOT-PS-13	37	0.005
http	Dell Laser Printer 1710n http config	37	0.005
http	3P print server http config	37	0.005
ipp	ZOT-PS-34 print server	35	0.005
http	RapidLogic httpd	34	0.005
http	Novell NetWare HTTP Stack	34	0.005
http	D-Link printer/webcam http config	34	0.005
http	uc-httpd	32	0.004
http	Oki Data C5150n printer http config	31	0.004
http	D-Link print server http config	31	0.004
ipp	ZOT-PS-15 print server	30	0.004
http	Integrated PrintNet Enterprise emHTTPD	29	0.004
arcserve	ARCserve Discovery	29	0.004
http	AXIS 5600P_r3 print server http config	28	0.004
http	TROY Web Admin	27	0.004
http	Mbedthis-Appweb	26	0.004
http	Konica Minolta C350 printer http config	26	0.004
mysql	MySQL	25	0.004
http	Oki Data C5400n printer http config	25	0.004
http	Oki Data C3200n printer http config	25	0.004
http	nginx	25	0.004
http	HP_Compact_Server	25	0.004
http	Kyocera Mita FS-1350DN printer http config	24	0.003
http	Dell Laser Printer M5200 http config	23	0.003
ftp	Microsoft ftpd	23	0.003
ipp	ZOT-PS-17 http	22	0.003
http	Oki Data C5300 printer http config	20	0.003
smtp	Microsoft ESMTP	19	0.003
http	AXIS 5400P_r2 print server http config	19	0.003
ftp	Pure-FTPd	19	0.003
ipp	ZOT-PS-19 print server	18	0.003
http	uTorrent WebUI	18	0.003
http	HP Officejet 6100 printer http config	18	0.003
http	GoAhead-Webs	18	0.003
http	AXIS 5600P print server http config	18	0.003
http	Oki Data C5100 printer http config	17	0.002
http	Gadspot/Avtech AV787 webcam http config	17	0.002
http	FUJITSU-XL-HTTP	17	0.002
http	DVR Systems webcam http interface	17	0.002
http	AXIS 5400P print server http config	17	0.002
http	silex Web Admin	16	0.002
http	Lexmark Optra T612 printer http config	16	0.002
http	Microplex emHTTPD	15	0.002
http	HP-ChaiServer	15	0.002
http	GeoVision GeoHttpServer for webcams	15	0.002
http	EPSON-HTTP	15	0.002
http	Dell Laser Printer 1700n http config	15	0.002
rtsp		14	0.002
http-proxy	MikroTik http proxy	14	0.002
http-proxy	F5 BIG-IP load balancer http proxy	14	0.002
http	Konica Minolta Magicolor 2300 DL printer http config	14	0.002
http	BusyBox httpd	14	0.002
http	AXIS 5550 print server http config	14	0.002
ftp	ProFTPD	14	0.002
ftp	FileZilla ftpd	14	0.002
http	RemotelyAnywhere remote PC management httpd	13	0.002
http	Oki Data C5450n printer http config	13	0.002
http	Oki Data C5250n printer http config	13	0.002
http	Cross Web Server	13	0.002
http	Allegro-Software-RomPager	13	0.002
ftp		13	0.002
dominoconsole	Lotus Domino Console	13	0.002
smtp	Microsoft Exchange smtpd	12	0.002
ipp	Epson 980N Printer	12	0.002
http	ZOT-PS-34	12	0.002
http	Microsoft HTTPAPI httpd	12	0.002
http	AIM HTTP	12	0.002
vnc	RealVNC Enterprise	11	0.002
vnc		11	0.002
ftp	vsftpd (before 2.0.8) or WU-FTPD	11	0.002
OPTIONS"	1.1Server	10	0.001
ipp	ZOT-PS-14 print server	10	0.001
http	Samsung SCX-8123 8128 Series	10	0.001
http	Lexmark Optra T610 printer http config	10	0.001
http	Epson printer httpd	10	0.001
http	Boa httpd	10	0.001
http	AXIS 5600 print server http config	10	0.001