Well-known ports: 0–1023

0-1023

Port	Description	Status
0/TCP,UDP	Reserved	Official
1/TCP,UDP	TCP Port Service Multiplexer	Official
2/TCP,UDP	Management Utility	Official
3/TCP,UDP	Compression Process	Official
5/TCP,UDP	Remote Job Entry	Official
7/TCP,UDP	Echo	Official
9/TCP,UDP	Discard	Official
11/TCP,UDP	Active Users	Official
13/TCP,UDP	DAYTIME – (RFC 867)	Official
17/TCP,UDP	Quote of the Day	Official
18/TCP,UDP	Message Send Protocol	Official
19/TCP,UDP	Character Generator	Official
20/TCP	FTP – data	Official
21/TCP	FTP—control (command)	Official
22/TCP,UDP	Secure Shell (SSH)—used for secure logins, file transfers (scp, sftp) and port forwarding	Official
23/TCP	Telnet protocol—unencrypted text communications	Official
25/TCP	Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail servers	Official
34/TCP,UDP	Remote File (RF)—used to transfer files between machines	Unofficial
35/TCP,UDP	Any private printer server protocol	Official
35/TCP,UDP	QMS Magicolor 2 printer server protocol	Unofficial
37/TCP,UDP	TIME protocol	Official
39/TCP,UDP	Resource Location Protocol[2] (RLP)—used for determining the location of higher level services from hosts on a network	Official
41/TCP,UDP	Graphics	Official
42/TCP,UDP	nameserver, ARPA Host Name Server Protocol	Official
42/TCP,UDP	WINS	Unofficial
43/TCP	WHOIS protocol	Official
49/TCP,UDP	TACACS aka TACOS Login Host protocol	Official
52/TCP,UDP	XNS (Xerox Network Services) Time Protocol	Official
53/TCP,UDP	Domain Name System (DNS)	Official
54/TCP,UDP	XNS (Xerox Network Services) Clearinghouse	Official
55/TCP,UDP	ISI-GL (ISI Graphics Language)	Unofficial
56/TCP,UDP	XNS (Xerox Network Services) Authentication	Official
56/TCP,UDP	RAP (Route Access Protocol)[3]	Unofficial
57/TCP	MTP, Mail Transfer Protocol	Unofficial
58/TCP,UDP	XNS (Xerox Network Services) Mail	Official
67/UDP	Bootstrap Protocol (BOOTP) Server; also used by Dynamic Host Configuration Protocol (DHCP)	Official
68/UDP	Bootstrap Protocol (BOOTP) Client; also used by Dynamic Host Configuration Protocol (DHCP)	Official
69/UDP	Trivial File Transfer Protocol (TFTP)	Official
70/TCP	Gopher protocol	Official
79/TCP	Finger protocol	Official
80/TCP,UDP	Hypertext Transfer Protocol (HTTP)	Official
81/TCP	Torpark—Onion routing	Unofficial
82/UDP	Torpark—Control	Unofficial
83/TCP	MIT ML Device	Official
88/TCP,UDP	Kerberos—authentication system	Official
90/TCP,UDP	dnsix (DoD Network Security for Information Exchange) Securit Attribute Token Map	Official
90/TCP,UDP	Pointcast	Unofficial
99/TCP	WIP Message Protocol	Unofficial
101/TCP	NIC host name	Official
102/TCP	ISO-TSAP (Transport Service Access Point) Class 0 protocol[4]	Official
104/TCP,UDP	ACR/NEMA Digital Imaging and Communications in Medicine	Official
107/TCP	Remote TELNET Service[5] protocol	Official
109/TCP	Post Office Protocol 2 (POP2)	Official
110/TCP	Post Office Protocol 3 (POP3)	Official
111/TCP,UDP	Sun Remote Procedure Call	Official
113/UDP	ident—user identification system, used by IRC servers to identify users	Official
113/TCP,UDP	Authentication Service (auth)	Official
115/TCP	Simple File Transfer Protocol (SFTP)	Official
117/TCP	UUCP Path Service	Official
118/TCP,UDP	SQL (Structured Query Language) Services	Official
119/TCP	Network News Transfer Protocol (NNTP)—used for retrieving newsgroup messages	Official
123/UDP	Network Time Protocol (NTP)—used for time synchronization	Official
135/TCP,UDP	DCE endpoint resolution	Official
135/TCP,UDP	Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service[6], used to remotely manage services including DHCP server, DNS server and WINS. Also used by DCOM	Unofficial
137/TCP,UDP	NetBIOS NetBIOS Name Service	Official
138/TCP,UDP	NetBIOS NetBIOS Datagram Service	Official
139/TCP,UDP	NetBIOS NetBIOS Session Service	Official
143/TCP,UDP	Internet Message Access Protocol (IMAP)—used for retrieving, organizing, and synchronizing e-mail messages	Official
152/TCP,UDP	Background File Transfer Program (BFTP)[7]	Official
153/TCP,UDP	SGMP, Simple Gateway Monitoring Protocol	Official
156/TCP,UDP	SQL Service	Official
158/TCP,UDP	DMSP, Distributed Mail Service Protocol	Unofficial
161/TCP,UDP	Simple Network Management Protocol (SNMP)	Official
162/TCP,UDP	Simple Network Management Protocol Trap (SNMPTRAP)[8]	Official
170/TCP	Print-srv, Network PostScript	Official
177/TCP,UDP	X Display Manager Control Protocol (XDMCP)	Official
179/TCP	BGP (Border Gateway Protocol)	Official
194/TCP,UDP	IRC (Internet Relay Chat)	Official
199/TCP,UDP	SMUX, SNMP Unix Multiplexer	Official
201/TCP,UDP	AppleTalk Routing Maintenance	Official
209/TCP,UDP	The Quick Mail Transfer Protocol	Official
213/TCP,UDP	IPX	Official
218/TCP,UDP	MPP, Message Posting Protocol	Official
220/TCP,UDP	IMAP, Interactive Mail Access Protocol, version 3	Official
259/TCP,UDP	ESRO, Efficient Short Remote Operations	Official
264/TCP,UDP	BGMP, Border Gateway Multicast Protocol	Official
311/TCP	Mac OS X Server Admin (officially AppleShare IP Web administration)	Official
308/TCP	Novastor Online Backup	Official
318/TCP,UDP	PKIX TSP, Time Stamp Protocol	Official
323/TCP,UDP	IMMP, Internet Message Mapping Protocol	Unofficial
350/TCP,UDP	MATIP-Type A, Mapping of Airline Traffic over Internet Protocol	Official
351/TCP,UDP	MATIP-Type B, Mapping of Airline Traffic over Internet Protocol	Official
366/TCP,UDP	ODMR, On-Demand Mail Relay	Official
369/TCP,UDP	Rpc2portmap	Official
370/TCP,UDP	codaauth2 – Coda authentication server	Unofficial
370/TCP,UDP	securecast1 – Outgoing packets to NAI's servers, http://www.nai.com/asp_set/anti_virus/alerts/faq.as	Unofficial
371/TCP,UDP	ClearCase albd	Official
383/TCP,UDP	HP data alarm manager	Official
384/TCP,UDP	A Remote Network Server System	Official
387/TCP,UDP	AURP, AppleTalk Update-based Routing Protocol	Official
389/TCP,UDP	Lightweight Directory Access Protocol (LDAP)	Official
401/TCP,UDP	UPS Uninterruptible Power Supply	Official
402/TCP	Altiris, Altiris Deployment Client	Unofficial
411/TCP	Direct Connect Hub	Unofficial
412/TCP	Direct Connect Client-to-Client	Unofficial
427/TCP,UDP	Service Location Protocol (SLP)	Official
443/TCP,UDP	Hypertext Transfer Protocol over TLS/SSL (HTTPS)	Official
444/TCP,UDP	SNPP, Simple Network Paging Protocol (RFC 1568)	Official
445/TCP	Microsoft-DS Active Directory, Windows shares	Official
445/UDP	Microsoft-DS SMB file sharing	Official
464/TCP,UDP	Kerberos Change/Set password	Official
465/TCP	Cisco protocol	Unofficial
465/TCP	SMTP over SSL	Unofficial
475/TCP	tcpnethaspsrv (Hasp services, TCP/IP version)	Official
497/TCP	Dantz Retrospect	Official
500/UDP	Internet Security Association and Key Management Protocol (ISAKMP)	Official
501/TCP	STMF, Simple Transportation Management Framework – DOT NTCIP 1101	Unofficial
502/TCP,UDP	Modbus, Protocol	Unofficial
504/TCP,UDP	Citadel – multiservice protocol for dedicated clients for the Citadel groupware system	Official
510/TCP	First Class Protocol	Unofficial
512/TCP	Rexec, Remote Process Execution	Official
512/UDP	comsat, together with biff	Official
513/TCP	Login	Official
513/UDP	Who	Official
514/TCP	Shell—used to execute non-interactive commands on a remote system	Official
514/UDP	Syslog—used for system logging	Official
515/TCP	Line Printer Daemon—print service	Official
517/UDP	Talk	Official
518/UDP	NTalk	Official
520/TCP	efs, extended file name server	Official
520/UDP	Routing—RIP	Official
524/TCP,UDP	NCP (NetWare Core Protocol) is used for a variety things such as access to primary NetWare server resources, Time Synchronization, etc.	Official
525/UDP	Timed, Timeserver	Official
530/TCP,UDP	RPC	Official
531/TCP,UDP	AOL Instant Messenger, IRC	Unofficial
532/TCP	netnews	Official
533/UDP	netwall, For Emergency Broadcasts	Official
540/TCP	UUCP (Unix-to-Unix Copy Protocol)	Official
542/TCP,UDP	commerce (Commerce Applications)	Official
543/TCP	klogin, Kerberos login	Official
544/TCP	kshell, Kerberos Remote shell	Official
546/TCP,UDP	DHCPv6 client	Official
547/TCP,UDP	DHCPv6 server	Official
548/TCP	Apple Filing Protocol (AFP) over TCP	Official
550/UDP	new-rwho, new-who	Official
554/TCP,UDP	Real Time Streaming Protocol (RTSP)	Official
556/TCP	Remotefs, RFS, rfs_server	Official
560/UDP	rmonitor, Remote Monitor	Official
561/UDP	monitor	Official
563/TCP,UDP	NNTP protocol over TLS/SSL (NNTPS)	Official
587/TCP	e-mail message submission[9] (SMTP)	Official
591/TCP	FileMaker 6.0 (and later) Web Sharing (HTTP Alternate, also see port 80)	Official
593/TCP,UDP	HTTP RPC Ep Map, Remote procedure call over Hypertext Transfer Protocol, often used by Distributed Component Object Model services and Microsoft Exchange Server	Official
604/TCP	TUNNEL profile[10], a protocol for BEEP peers to form an application layer tunnel	Official
623/UDP	ASF Remote Management and Control Protocol (ASF-RMCP)	Official
631/TCP,UDP	Internet Printing Protocol (IPP)	Official
636/TCP,UDP	Lightweight Directory Access Protocol over TLS/SSL (LDAPS)	Official
639/TCP,UDP	MSDP, Multicast Source Discovery Protocol	Official
641/TCP,UDP	SupportSoft Nexus Remote Command (control/listening): A proxy gateway connecting remote control traffic	Official
646/TCP,UDP	LDP, Label Distribution Protocol, a routing protocol used in MPLS networks	Official
647/TCP	DHCP Failover protocol[11]	Official
648/TCP	RRP (Registry Registrar Protocol)[12]	Official
652/TCP	DTCP, Dynamic Tunnel Configuration Protocol	Unofficial
653/TCP,UDP	SupportSoft Nexus Remote Command (data): A proxy gateway connecting remote control traffic	Official
654/TCP	AODV (Ad-hoc On-demand Distance Vector)	Official
655/TCP	IEEE MMS (IEEE Media Management System)[13][14]	Official
657/TCP,UDP	IBM RMC (Remote monitoring and Control) protocol, used by System p5 AIX Integrated Virtualization Manager (IVM)[15] and Hardware Management Console to connect managed logical partitions (LPAR) to enable dynamic partition reconfiguration	Official
660/TCP	Mac OS X Server administration	Official
665/TCP	sun-dr, Remote Dynamic Reconfiguration	Unofficial
666/UDP	Doom, first online first-person shooter	Official
674/TCP	ACAP (Application Configuration Access Protocol)	Official
691/TCP	MS Exchange Routing	Official
692/TCP	Hyperwave-ISP	Official
694/UDP	Linux-HA High availability Heartbeat	Unofficial
695/TCP	IEEE-MMS-SSL (IEEE Media Management System over SSL)[16]	Official
698/UDP	OLSR (Optimized Link State Routing)	Official
699/TCP	Access Network	Official
700/TCP	EPP (Extensible Provisioning Protocol), a protocol for communication between domain name registries and registrars (RFC 4934)	Official
701/TCP	LMP (Link Management Protocol (Internet))[17], a protocol that runs between a pair of nodes and is used to manage traffic engineering (TE) links	Official
702/TCP	IRIS[18][19] (Internet Registry Information Service) over BEEP (Blocks Extensible Exchange Protocol)[20] (RFC 3983)	Official
706/TCP	SILC, Secure Internet Live Conferencing	Official
711/TCP	Cisco TDP, Tag Distribution Protocol[21][22][23]—being replaced by the MPLS Label Distribution Protocol[24]	Official
712/TCP	TBRPF, Topology Broadcast based on Reverse-Path Forwarding routing protocol (RFC 3684)	Official
712/UDP	Promise RAID Controller	Unofficial
720/TCP	SMQP, Simple Message Queue Protocol	Unofficial
749/TCP,UDP	Kerberos administration	Official
750/TCP	rfile	Official
750/UDP	loadav	Official
750/UDP	kerberos-iv, Kerberos version IV	Official
751/TCP,UDP	pump	Official
751/TCP,UDP	kerberos_master, Kerberos authentication	Unofficial
752/TCP	qrh	Official
752/UDP	qrh	Official
752/UDP	userreg_server, Kerberos Password (kpasswd) server	Unofficial
753/TCP	Reverse Routing Header (rrh)[25]	Official
753/UDP	Reverse Routing Header (rrh)	Official
753/UDP	passwd_server, Kerberos userreg server	Unofficial
754/TCP	tell send	Official
754/TCP	krb5_prop, Kerberos v5 slave propagation	Unofficial
754/UDP	tell send	Official
760/TCP,UDP	ns	Official
760/TCP,UDP	krbupdate [kreg], Kerberos registration	Unofficial
782/TCP	Conserver serial-console management server	Unofficial
783/TCP	SpamAssassin spamd daemon	Unofficial
829/TCP	CMP (Certificate Management Protocol)	Unofficial
843/TCP	Adobe Flash socket policy server	Unofficial
860/TCP	iSCSI (RFC 3720)	Official
873/TCP	rsync file synchronisation protocol	Official
888/TCP	cddbp, CD DataBase (CDDB) protocol (CDDBP)—unassigned but widespread use	Unofficial
901/TCP	Samba Web Administration Tool (SWAT)	Unofficial
901/TCP, UDP	VMware Virtual Infrastructure Client (UDP from server being managed to management console)	Unofficial
902/TCP	VMware Server Console (TCP from management console to server being Managed)	Unofficial
902/UDP	VMware Server Console (UDP from server being managed to management console)	Unofficial
903/TCP	VMware Remote Console [26]	Unofficial
904/TCP	VMware Server Alternate (if 902 is in use, i.e. SUSE linux)	Unofficial
911/TCP	Network Console on Acid (NCA)—local tty redirection over OpenSSH	Unofficial
953/TCP,UDP	Domain Name System (DNS) RDNC Service	Unofficial
981/TCP	SofaWare Technologies Remote HTTPS management for firewall devices running embedded Check Point FireWall-1 software	Unofficial
989/TCP,UDP	FTPS Protocol (data): FTP over TLS/SSL	Official
990/TCP,UDP	FTPS Protocol (control): FTP over TLS/SSL	Official
991/TCP,UDP	NAS (Netnews Administration System)	Official
992/TCP,UDP	TELNET protocol over TLS/SSL	Official
993/TCP	Internet Message Access Protocol over SSL (IMAPS)	Official
995/TCP	Post Office Protocol 3 over TLS/SSL (POP3S)	Official
999/TCP	ScimoreDB Database System	Unofficial
1001/TCP	JtoMB	Unofficial
1023/TCP,UDP	Reserved[1]	Official