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	Version	Info	OS	Devicetype	Count	Percent
http	Digifort Enterprise 6.5 httpd			Windows		299302	42.061
ipp	CUPS	1.4				88127	12.385
ipp	CUPS	1.1				54954	7.723
http						27756	3.901
ipp	CUPS	1.5				24555	3.451
ipp	CUPS	1.3				24500	3.443
http	HP-ChaiSOE	1.0	HP LaserJet http config		printer	20807	2.924
http	Virata-EmWeb	6.2.1	HP LaserJet http config		printer	17829	2.506
ipp	Web-Server httpd	3.0	NRG copier or Ricoh Aficio printer http config		printer	15230	2.14
ipp	CUPS	1.2				8141	1.144
http	HTTP	1.0				7390	1.039
http	HP JetDirect printer webadmin		HP-ChaiServer 3.0		printer	7207	1.013
ipp	Xerox Phaser 3500				printer	7195	1.011
ipp	CUPS	1.6				5705	0.802
ipp	Xerox WorkCentre IPP				printer	5273	0.741
http	ActionTec TR-069 remote access					4950	0.696
http	thttpd					4790	0.673
http	Virata-EmWeb	6.2.1				4333	0.609
http	SonicWALL				firewall	3752	0.527
http	Konica Minolta PageScope Web Connection httpd					3725	0.523
http	Apache					3528	0.496
soap	gSOAP soap	2.7				3027	0.425
http	Debut embedded httpd	1.08	Brother/HP printer http admin		printer	2379	0.334
http	Web-Server	3.0				2256	0.317
chat	AIM or ICQ server					2238	0.315
http	HP Jetdirect httpd					1821	0.256
ipp	Canon printer http config	2.21				1757	0.247
ipp	Canon printer http config	2.30				1747	0.246
http	JC-SHTTPD	1.17.22	Sharp printer		printer	1629	0.229
http	HP JetDirect Card in a LaserJet printer		HP-ChaiServer Embedded VM 3.0		printer	1498	0.211
ipp	Epson ippd	1.0			print server	1452	0.204
http	Canon printer web interface					1424	0.2
http	Allegro RomPager	4.34	Xerox Phaser 4500 printer http config		printer	1303	0.183
ipp	Canon printer http config	1.00				1232	0.173
no match						1101	0.155
http	HP LaserJet P1606 http config				printer	1066	0.15
ipp	Epson ippd	1.1	AL-C2800 printer		printer	986	0.139
http	Debut embedded httpd	0.07	Brother/HP printer http admin		printer	980	0.138
ipp	CUPS	1.3.7				921	0.129
http	Kyocera FS-3900DN printer http config	1.2.0			printer	784	0.11
http	Apache	2.0.63	(NETWARE) mod_jk/1.2.23			757	0.106
http	Lexmark printer http config				printer	743	0.104
http	AIM	1.0				657	0.092
http	Agranat-EmWeb	5.2.6	HP LaserJet http config		printer	645	0.091
http	Octoshape P2P streaming web service					599	0.084
ipp	Thecus N5200 IPP				storage-misc	566	0.08
http	lighttpd	1.4.19				509	0.072
http	KM-httpd	1.2.0				461	0.065
http	lighttpd	1.4.29				438	0.062
http	Allegro RomPager	4.34				425	0.06
http	GoAhead-Webs httpd					423	0.059
http	JC-SHTTPD	1.17.20	Sharp printer		printer	375	0.053
http	Allegro RomPager	4.34	Xerox Phaser 8560DN printer http config		printer	358	0.05
http	Apache	2.2.3	(Linux/SUSE)			343	0.048
http	JC-HTTPD	1.11.14				332	0.047
http	Lexmark printer http config		Lexmark T650		printer	328	0.046
http	Debut embedded httpd	0.03	Brother/HP printer http admin		printer	319	0.045
http	Apache	1.3.41	(Unix)			317	0.045
http	JC-HTTPD	1.11.14	Sharp AR-M550N printer http config		printer	315	0.044
ipp	CUPS	1.3.8				307	0.043
http	HP HTTP Server					306	0.043
http	JC-HTTPD	1.12.16				288	0.04
http	Rapid Logic	1.1				278	0.039
http	Kyocera IB-21E printer http config		JC-HTTPD 1.14.18		printer	275	0.039
http	PRINT_SERVER WEB	1.0	Linksys wireless print server http config		print server	261	0.037
http	Xerox WorkCentre http config				printer	259	0.036
ipp	Canon printer http config	2.00				256	0.036
http	Apache	2.0.59	(NETWARE) mod_jk/1.2.21			254	0.036
http	Lexmark printer http config		Lexmark E260dn		printer	220	0.031
http	Microsoft IIS httpd	6.0		Windows		218	0.031
http	Xerox MicroServer httpd	Xerox11	usually a printer/copier			214	0.03
http	lighttpd	1.4.11				213	0.03
http	JC-HTTPD	1.14.18				213	0.03
http	Webserver					208	0.029
http	Agranat-EmWeb	5.2.6				207	0.029
http	Dell 1815dn printer http config				printer	204	0.029
http	JC-HTTPD	1.14.20				203	0.029
http	Apache Tomcat/Coyote JSP engine	1.1				198	0.028
http	Lexmark printer http config		Lexmark E360dn		printer	178	0.025
ipp	CUPS	1.3.9				175	0.025
http	Konica Minolta 350 printer http config		PageScope Web Connection		printer	175	0.025
http	Allegro RomPager	4.01				174	0.024
http	Lexmark printer http config		Lexmark E460dn		printer	173	0.024
http	Lexmark printer http config		Lexmark C544		printer	172	0.024
http	Spyglass MicroServer	2.01FC1			printer	168	0.024
http	Agranat-EmWeb	5.2.0	HP Designjet 800ps printer http config		printer	166	0.023
ipp	Canon printer http config	2.20				156	0.022
http	thttpd		T644		printer	154	0.022
http	Xerox WorkCentre Pro httpd				printer	153	0.022
http	Toshiba e-STUDIO printer http config				printer	142	0.02
http	Lexmark printer http config		Lexmark X544		printer	140	0.02
http	Konica Minolta 250 printer http config		PageScope Web Connection		printer	139	0.02
http	Lexmark printer webadmin		Lexmark T630		printer	136	0.019
http	Allegro RomPager	4.30	Xerox Phaser 4500 printer http config		printer	135	0.019
http	Allegro RomPager	2.00				135	0.019
http	Konica Minolta bizhub 423 printer http config				printer	130	0.018
http	ZOT-PS-47	9.8.0013				128	0.018
http	thttpd	2.24 26oct2003				128	0.018
http	Lexmark printer http config		Lexmark X464de		printer	125	0.018
http	Allegro RomPager	4.10				125	0.018
http	Allegro RomPager	4.10	Xerox Phaser 4500 printer http config		printer	122	0.017
http	Allegro RomPager	4.30				121	0.017
ipp	CUPS	1.3.11				120	0.017
http	DrcomServer1.0					120	0.017
http	Lexmark printer http config		Lexmark C543		printer	118	0.017
http	Lexmark printer webadmin		Lexmark E120n		printer	116	0.016
http	Lexmark printer http config		Lexmark T652		printer	115	0.016
ipp	ZOT-PS-35 print server	6.2.0001			print server	109	0.015
http	Lexmark printer http config		Lexmark X264dn		printer	109	0.015
http	Avtech AVN801 network camera	1.0	UPnP 1.0		webcam	109	0.015
http	Konica Minolta 200 printer http config		PageScope Web Connection		printer	106	0.015
http	Allegro RomPager	4.34	Xerox printer http admin; printer 8560DN		printer	105	0.015
ipp	Canon printer http config	2.10				101	0.014
http	PRINT_SERVER WEB 1.0					99	0.014
http	thttpd		T640		printer	98	0.014
ipp	CUPS	1.2.12				97	0.014
http	Lexmark printer http config		Lexmark E352dn		printer	92	0.013
http	Allegro RomPager	4.34	Xerox printer http admin; printer 6360DN		printer	92	0.013
http	Allegro RomPager	4.30	Xerox Phaser 8560DN printer http config		printer	92	0.013
ssh			protocol 1.5			91	0.013
http	JC-HTTPD	1.11.14	Sharp AR-NC5J network card http config		printer	91	0.013
http	Konica Minolta bizhub printer http config				printer	89	0.013
http	GoAhead-Webs embedded httpd					89	0.013
http	Microsoft IIS httpd	7.5		Windows		88	0.012
http	Hawking Print Server httpd	5.6.2058			print server	87	0.012
http	Allegro RomPager	3.10				87	0.012
http	Lexmark printer http config		Lexmark T654		printer	85	0.012
http	Lexmark printer http config		Lexmark C540		printer	84	0.012
http	Lexmark printer http config		Lexmark E250dn		printer	81	0.011
ipp	ZOT-PS-30 print server	8.3.0013			print server	80	0.011
ipp	CUPS	1.2.7				78	0.011
http	Netwave IP camera http config				webcam	77	0.011
http	Lexmark printer webadmin		Lexmark T632		printer	77	0.011
http	Zebra ZTC 105SL label printer http config				printer	75	0.011
http	Dell Laser Printer W5300 http config				printer	75	0.011
http	Allegro RomPager	4.34	Xerox printer http admin; printer 4510N		printer	74	0.01
ipp	Kyocera Mita KM-1530 IPP				printer	72	0.01
http	Toshiba e-STUDIO 233 copier/printer/fax http config				printer	72	0.01
http	JC-HTTPD	1.14.18	Kyocera FS-1030D printer http config		printer	72	0.01
http	Kyocera IB-21G printer http config		JC-HTTPD 1.14.18		printer	71	0.01
ipp	Canon printer http config	2.11				70	0.01
http	Lexmark printer http config		Lexmark X364dn		printer	70	0.01
http	Konica Minolta 222 printer http config		PageScope Web Connection		printer	69	0.01
http	Allegro RomPager	4.34	Xerox printer http admin; printer 8560N		printer	68	0.01
http	thttpd		T642		printer	67	0.009
http	JC-HTTPD	1.16.22				66	0.009
http	Allegro RomPager	4.30	Xerox printer http admin; printer 8550DP		printer	66	0.009
http	Konica Minolta 282 printer http config		PageScope Web Connection		printer	65	0.009
http	JC-HTTPD	2.16.20				62	0.009
http	JC-HTTPD	1.16.27				62	0.009
http	Apache	2.0.59	(NETWARE) mod_jk/1.2.15			61	0.009
http	Jetty	6.1.26				59	0.008
http	JC-HTTPD	1.16.20				59	0.008
http	Allegro RomPager	4.34	Xerox printer http admin; printer 4510DT		printer	59	0.008
http	Apache	2.2.12	(Linux/SUSE)			58	0.008
http	Lexmark printer http config		Lexmark X204n		printer	57	0.008
http	Konica Minolta 362 printer http config		PageScope Web Connection		printer	55	0.008
http	Apache	2.0.54	(NETWARE) mod_jk/1.2.14			55	0.008
http	Allegro RomPager	3.06b1	Xerox printer http admin		printer	55	0.008
http	thttpd		C534		printer	54	0.008
http	Oki Data C5200n printer http config		JC-HTTPD 1.12.16		printer	53	0.007
http	Lexmark printer http config		Lexmark X734de		printer	52	0.007
http	JC-HTTPD	1.3.7				52	0.007
telnet						51	0.007
http	mini_httpd	1.19 19dec2003				51	0.007
http	Ricoh Aficio MP C4000 http config				printer	50	0.007
http	PRINT_SERVER WEB	1.0	LevelOne FPS-3001TXU print server http config		print server	50	0.007
http	Agranat-EmWeb	5.2.0				50	0.007
ipp	CUPS	1.3.10				49	0.007
http	PDR-M800	1.0				48	0.007
http	Microsoft IIS httpd	7.0		Windows		48	0.007
http	JC-HTTPD	1.14.19				48	0.007
http	Lexmark printer http config		Lexmark C734		printer	47	0.007
http	Allegro RomPager	4.34	Xerox printer http admin; printer 7760GX		printer	47	0.007
http	Lexmark printer http config		Lexmark X736de		printer	46	0.006
http	Boa HTTPd	0.94.14rc21				46	0.006
http	Apache	2.2.17	(Unix) DAV/2 PHP/5.3.6 mod_ssl/2.2.17 OpenSSL/0.9.8o			46	0.006
ipp	ZOT-PS-39 print server	6.2.0001			print server	45	0.006
http	EWS-NIC	1.0				44	0.006
http	Apache	2.2.8	(Ubuntu) PHP/5.2.4-2ubuntu5.24 with Suhosin-Patch			44	0.006
http	Allegro RomPager	4.34	Xerox printer http admin; printer 8560		printer	43	0.006
http	ZOT-PS-47	9.8.0021				42	0.006
http	Kyocera IB-21E printer http config		JC-HTTPD 1.3.7		printer	42	0.006
http	Allegro RomPager	4.34	Xerox printer http admin; printer 8560DT		printer	42	0.006
vnc	VNC		protocol 3.8			40	0.006
http	Hikvision-Webs					40	0.006
http	Allegro RomPager	4.34	Xerox printer http admin; printer 7760DN		printer	40	0.006
http	Konica Minolta PageScope Web Connection				printer	39	0.005
http	Allegro RomPager	4.30	Xerox printer http admin; printer 6350DP		printer	39	0.005
http	Allegro RomPager	4.10	Xerox Phaser http admin		printer	39	0.005
http	Web Server	2.0				38	0.005
http	thttpd		C532		printer	38	0.005
http	PRINT_SERVER WEB	1.0	Netgear PS121v2 print server http config		print server	38	0.005
http	Lexmark printer http config		Lexmark Pro910 Series		printer	38	0.005
http	Allegro RomPager	4.10	Xerox printer http admin; printer 4500N		printer	38	0.005
ipp	ZOT-PS-30 print server	8.3.0008			print server	37	0.005
ipp	Web-Server httpd	3.1	NRG copier or Ricoh Aficio printer http config		printer	37	0.005
http	thttpd		C530		printer	37	0.005
http	Lexmark printer http config		Lexmark C736		printer	37	0.005
http	Dell Laser Printer 1710n http config				printer	37	0.005
http	Kyocera IB-21E printer http config		JC-HTTPD 1.12.17		printer	36	0.005
http	Allegro RomPager	4.30	Xerox printer http admin; printer 7400DN		printer	36	0.005
http	Allegro RomPager	4.30	Xerox printer http admin; printer 6300DN		printer	36	0.005
http	thttpd	2.25b 29dec2003				35	0.005
http	Lexmark printer webadmin		Lexmark T430		printer	35	0.005
http	Lexmark printer http config		Lexmark X342n		printer	35	0.005
ipp	CUPS	1.2.4				34	0.005
http	Lexmark printer http config		Lexmark X463de		printer	34	0.005
http	D-Link printer/webcam http config					34	0.005
http	Allegro RomPager	4.30	Xerox printer http admin; printer 8500N		printer	34	0.005
http	Allegro RomPager	4.10	Xerox printer http admin; printer 6250DP		printer	34	0.005
ipp	ZOT-PS-35 print server	6.3.0010			print server	33	0.005
http	print server http config	ZOT-PS-30/8.3.0013			print server	33	0.005
http	Hawking Print Server httpd	5.7.2068			print server	33	0.005
http	uc-httpd	1.0.0				32	0.004
http	thttpd		E450dn		printer	32	0.004
http	print server http config	ZOT-PS-35/6.2.0001			print server	32	0.004
http	Allegro RomPager	4.01	Lexmark C500 printer http config		printer	32	0.004
ipp	ZOT-PS-30 print server	8.3.0007			print server	31	0.004
ipp	CUPS	1.3.5				31	0.004
http	Oki Data C5150n printer http config		JC-HTTPD 1.12.16		printer	31	0.004
http	Lexmark printer http config		Lexmark X543		printer	31	0.004
http	D-Link print server http config	1.0			print server	31	0.004
ipp	ZOT-PS-15 print server	6.8.0104			print server	30	0.004
http	Lexmark printer webadmin		Lexmark E240n		printer	30	0.004
http	Lexmark printer http config		Lexmark X656de		printer	30	0.004
http	Lexmark printer http config		Lexmark T656		printer	30	0.004
http	JC-HTTPD	1.12.17				30	0.004
http	3P print server http config		ZOT-PS-11 5.4.2049		print server	30	0.004
http	Microsoft IIS httpd	5.1		Windows		29	0.004
http	Lexmark printer webadmin		Lexmark T522		printer	29	0.004
http	Integrated PrintNet Enterprise emHTTPD	1.1				29	0.004
http	HP Officejet Pro 8600 printer http config		Serial CN21LAK21V05KD		printer	29	0.004
arcserve	ARCserve Discovery					29	0.004
ipp	ZOT-PS-35 print server	6.3.0006			print server	28	0.004
ipp	Canon printer http config	1.10				28	0.004
http	Lexmark printer webadmin		Lexmark T634		printer	28	0.004
http	Lexmark printer webadmin		Lexmark T520		printer	28	0.004
http	Lexmark printer http config		Lexmark S310 Series		printer	28	0.004
http	JC-HTTPD	1.16.25				28	0.004
http	Allegro RomPager	4.10	Xerox printer http admin; printer 4500DT		printer	28	0.004
http	TROY Web Admin					27	0.004
http	ZOT-PS-30	8.3.0013				26	0.004
http-proxy	Squid http proxy	2.6.STABLE12				26	0.004
http	Lexmark printer http config		Lexmark X738de		printer	26	0.004
http	Konica Minolta C350 printer http config		PageScope Web Connection		printer	26	0.004
http	Oki Data C5400n printer http config		JC-HTTPD 1.12.16		printer	25	0.004
http	Oki Data C3200n printer http config		JC-HTTPD 1.12.16		printer	25	0.004
http	Lexmark printer webadmin		Lexmark C510		printer	25	0.004
http	Lexmark printer http config		Lexmark X363dn		printer	25	0.004
http	JC-HTTPD	1.15.20				25	0.004
http	HP_Compact_Server					25	0.004
http	EWS-NIC3	10.05				25	0.004
ipp	ZOT-PS-39 print server	6.3.0007			print server	24	0.003
http	ZOT-PS-47	ZOT-PS-47	PrnServr			24	0.003
http	ZOT-PS-47	9.8.0016				24	0.003
http	Mbedthis-Appweb	2.0.4				24	0.003
http	Kyocera Mita FS-1350DN printer http config				printer	24	0.003
http	HP Photosmart Plus B210 series printer http config		Serial BR193FB08R05J9		printer	24	0.003
http	Apache	2.2.3	(CentOS)			24	0.003
http	Apache	2.0.63	(NETWARE) mod_jk/1.2.23 PHP/5.0.5			24	0.003
http	Allegro RomPager	4.34	Xerox printer http admin; printer 7500DT		printer	24	0.003
http	Zero One Technology ZOT-PS-19 httpd	8.1.0009	IOGear GPSU01 USB print server http config		print server	23	0.003
http	PRINT_SERVER WEB 1.0		WPSM54G			23	0.003
http	Dell Laser Printer M5200 http config				printer	23	0.003
http	Apache		SSL-only mode			23	0.003
http	Apache	2.0.63	(NETWARE) PHP/5.0.5 mod_jk/1.2.23			23	0.003
http	Allegro RomPager	4.34	Xerox printer http admin; printer 7500DN		printer	23	0.003
ipp	ZOT-PS-30 print server	8.3.0009			print server	22	0.003
http	ZOT-PS-35	6.2.0001				22	0.003
http	Web-Server	3.1				22	0.003
http	Lexmark printer webadmin		Lexmark T620		printer	22	0.003
http	Allegro RomPager	4.30	Xerox printer http admin; printer 8500DN		printer	22	0.003
ftp	Microsoft ftpd			Windows		22	0.003
http	ZOT-PS-47	ZOT-PS-47	TL-PS110U			21	0.003
http	Allegro RomPager	4.34	Xerox printer http admin; printer 6360N		printer	21	0.003
http	Allegro RomPager	4.34	Xerox printer http admin; printer 5550DN		printer	21	0.003
http	Allegro RomPager	4.30	Xerox printer http admin; printer 6300N		printer	21	0.003
ipp	CUPS	1.3.6				20	0.003
http	ZOT-PS-47	ZOT-PS-47	LCS-PS101-A			20	0.003
http	PRINT_SERVER WEB	1.0	Netgear print server http config		print server	20	0.003
http	Oki Data C5300 printer http config		JC-HTTPD 1.12.16		printer	20	0.003
http	Microsoft IIS httpd					20	0.003
http	Apache	1.3.26	(Unix)			20	0.003
http	Allegro RomPager	4.34	Xerox printer http admin; printer 7760DX		printer	20	0.003
http	Allegro RomPager	4.10	Xerox printer http admin; printer 6250N		printer	20	0.003