List of TCP and UDP port numbers

Port # / Layer	Name	Comment
1	tcpmux	TCP port service multiplexer
5	rje	Remote Job Entry
7	echo	Echo service
9	discard	Null service for connection testing
11	systat	System Status service for listing connected ports
13	daytime	Sends date and time to requesting host
17	qotd	Sends quote of the day to connected host
18	msp	Message Send Protocol
19	chargen	Character Generation service; sends endless stream of characters
20	ftp-data	FTP data port
21	ftp	File Transfer Protocol (FTP) port; sometimes used by File Service Protocol (FSP)
22	ssh	Secure Shell (SSH) service
23	telnet	The Telnet service
25	smtp	Simple Mail Transfer Protocol (SMTP)
37	time	Time Protocol
39	rlp	Resource Location Protocol
42	nameserver	Internet Name Service
43	nicname	WHOIS directory service
49	tacacs	Terminal Access Controller Access Control System for TCP/IP based authentication and access
50	re-mail-ck	Remote Mail Checking Protocol
53	domain	domain name services (such as BIND)
63	whois++	WHOIS++, extended WHOIS services
67	bootps	Bootstrap Protocol (BOOTP) services; also used by Dynamic Host Configuration Protocol (DHCP) services
68	bootpc	Bootstrap (BOOTP) client; also used by Dynamic Host Control Protocol (DHCP) clients
69	tftp	Trivial File Transfer Protocol (TFTP)
70	gopher	Gopher Internet document search and retrieval
71	netrjs-1	Remote Job Service
72	netrjs-2	Remote Job Service
73	netrjs-3	Remote Job Service
73	netrjs-4	Remote Job Service
79	finger	Finger service for user contact information
80	http	HyperText Transfer Protocol (HTTP) for World Wide Web (WWW) services
88	kerberos	Kerberos network authentication system
95	supdup	Telnet protocol extension
101	hostname	Hostname services on SRI-NIC machines
102/tcp	iso-tsap	ISO Development Environment (ISODE) network applications
105	csnet-ns	Mailbox nameserver; also used by CSO nameserver
107	rtelnet	Remote Telnet
109	pop2	Post Office Protocol version 2
110	pop3	Post Office Protocol version 3
111	sunrpc	Remote Procedure Call (RPC) Protocol for remote command execution, used by Network Filesystem (NFS)
113	auth	Authentication and Ident protocols
115	sftp	Secure File Transfer Protocol (SFTP) services
117	uucp-path	Unix-to-Unix Copy Protocol (UUCP) Path services
119	nntp	Network News Transfer Protocol (NNTP) for the USENET discussion system
123	ntp	Network Time Protocol (NTP)
137	netbios-ns	NETBIOS Name Service used in Red Hat Enterprise Linux by Samba
138	netbios-dgm	NETBIOS Datagram Service used in Red Hat Enterprise Linux by Samba
139	netbios-ssn	NETBIOS Session Service used in Red Hat Enterprise Linux by Samba
143	imap	Internet Message Access Protocol (IMAP)
161	snmp	Simple Network Management Protocol (SNMP)
162	snmptrap	Traps for SNMP
163	cmip-man	Common Management Information Protocol (CMIP)
164	cmip-agent	Common Management Information Protocol (CMIP)
174	mailq	MAILQ email transport queue
177	xdmcp	X Display Manager Control Protocol (XDMCP)
178	nextstep	NeXTStep window server
179	bgp	Border Gateway Protocol
191	prospero	Prospero distributed filesystem services
194	irc	Internet Relay Chat (IRC)
199	smux	SNMP UNIX Multiplexer
201	at-rtmp	AppleTalk routing
202	at-nbp	AppleTalk name binding
204	at-echo	AppleTalk echo
206	at-zis	AppleTalk zone information
209	qmtp	Quick Mail Transfer Protocol (QMTP)
210	z39.50	NISO Z39.50 database
213	ipx	Internetwork Packet Exchange (IPX), a datagram protocol commonly used in Novell Netware environments
220	imap3	Internet Message Access Protocol version 3
245	link	LINK / 3-DNS iQuery service
347	fatserv	FATMEN file and tape management server
363	rsvp_tunnel	RSVP Tunnel
369	rpc2portmap	Coda file system portmapper
370	codaauth2	Coda file system authentication services
372	ulistproc	UNIX LISTSERV
389	ldap	Lightweight Directory Access Protocol (LDAP)
427	svrloc	Service Location Protocol (SLP)
434	mobileip-agent	Mobile Internet Protocol (IP) agent
435	mobilip-mn	Mobile Internet Protocol (IP) manager
443	https	Secure Hypertext Transfer Protocol (HTTP)
444	snpp	Simple Network Paging Protocol
445	microsoft-ds	Server Message Block (SMB) over TCP/IP
464	kpasswd	Kerberos password and key changing services
468	photuris	Photuris session key management protocol
487	saft	Simple Asynchronous File Transfer (SAFT) protocol
488	gss-http	Generic Security Services (GSS) for HTTP
496	pim-rp-disc	Rendezvous Point Discovery (RP-DISC) for Protocol Independent Multicast (PIM) services
500	isakmp	Internet Security Association and Key Management Protocol (ISAKMP)
535	iiop	Internet Inter-Orb Protocol (IIOP)
538	gdomap	GNUstep Distributed Objects Mapper (GDOMAP)
546	dhcpv6-client	Dynamic Host Configuration Protocol (DHCP) version 6 client
547	dhcpv6-server	Dynamic Host Configuration Protocol (DHCP) version 6 Service
554	rtsp	Real Time Stream Control Protocol (RTSP)
563	nntps	Network News Transport Protocol over Secure Sockets Layer (NNTPS)
565	whoami	whoami user ID listing
587	submission	Mail Message Submission Agent (MSA)
610	npmp-local	Network Peripheral Management Protocol (NPMP) local / Distributed Queueing System (DQS)
611	npmp-gui	Network Peripheral Management Protocol (NPMP) GUI / Distributed Queueing System (DQS)
612	hmmp-ind	HyperMedia Management Protocol (HMMP) Indication / DQS
631	ipp	Internet Printing Protocol (IPP)
636	ldaps	Lightweight Directory Access Protocol over Secure Sockets Layer (LDAPS)
674	acap	Application Configuration Access Protocol (ACAP)
694	ha-cluster	Heartbeat services for High-Availability Clusters
749	kerberos-adm	Kerberos version 5 (v5) 'kadmin' database administration
750	kerberos-iv	Kerberos version 4 (v4) services
765	webster	Network Dictionary
767	phonebook	Network Phonebook
873	rsync	rsync file transfer services
992	telnets	Telnet over Secure Sockets Layer (TelnetS)
993	imaps	Internet Message Access Protocol over Secure Sockets Layer (IMAPS)
994	ircs	Internet Relay Chat over Secure Sockets Layer (IRCS)
995	pop3s	Post Office Protocol version 3 over Secure Sockets Layer (POP3S)