Comment on page

Top 1000 Well Known Ports

https://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

Port
TCP
UDP
IANA status
Description
SCTP
0
Reserved
Reserved
Official
​
​
N/A
N/A
Unofficial
In programming APIs (not in communication between hosts), requests a system-allocated (dynamic) port
​
​
1
Yes
Assigned
Official
​TCP Port Service Multiplexer (TCPMUX). Historic. Both TCP and UDP have been assigned to TCPMUX by IANA, but by design only TCP is specified.
​
5
Assigned
Assigned
Official
​Remote Job Entry was historically using socket 5 in its old socket form, while MIB PIM has identified it as TCP/5 and IANA has assigned both TCP and UDP 5 to it.
​
7
Yes
Yes
Official
​Echo Protocol​
​
9
Yes
Yes
Official
​Discard Protocol​
Yes
No
Yes
Unofficial
​Wake-on-LAN​
​
​
11
Yes
Yes
Official
Active Users (systat service)
​
13
Yes
Yes
Official
​Daytime Protocol​
​
15
Yes
No
Unofficial
Previously netstat servic
​
17
Yes
Yes
Official
​Quote of the Day (QOTD)
​
18
Yes
Yes
Official
​Message Send Protocol​
​
19
Yes
Yes
Official
​Character Generator Protocol (CHARGEN)
​
20
Yes
Assigned
Official
​File Transfer Protocol (FTP) data transfer
Yes
21
Yes
Assigned
Official
​File Transfer Protocol (FTP) control (command)
Yes
22
Yes
Assigned
Official
​Secure Shell (SSH), secure logins, file transfers (scp, sftp) and port forwarding
Yes
23
Yes
Assigned
Official
​Telnet protocol—unencrypted text communications
​
25
Yes
Assigned
Official
​Simple Mail Transfer Protocol (SMTP), used for email routing between mail servers
​
37
Yes
Yes
Official
​Time Protocol​
​
42
Assigned
Yes
Official
​Host Name Server Protocol​
​
43
Yes
Assigned
Official
​WHOIS protocol
​
47
Reserved
Reserved
Official
​
​
49
Yes
Yes
Official
​TACACS Login Host protocol. TACACS+, still in draft which is an improved but distinct version of TACACS, only uses TCP 49.
​
51
Reserved
Reserved
Official
Historically used for Interface Message Processor logical address management, entry has been removed by IANA on 2013-05-25
​
52
Assigned
Assigned
Official
​Xerox Network Systems (XNS) Time Protocol. Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.
​
53
Yes
Yes
Official
​Domain Name System (DNS)
​
54
Assigned
Assigned
Official
Xerox Network Systems (XNS) Clearinghouse (Name Server). Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.
​
56
Assigned
Assigned
Official
Xerox Network Systems (XNS) Authentication Protocol. Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.
​
58
Assigned
Assigned
Official
Xerox Network Systems (XNS) Mail. Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.
​
61
Reserved
Reserved
Official
Historically assigned to the NIFTP-Based Mail protocol, but was never documented in the related IEN. The port number entry was removed from IANA's registry on 2017-05-18.
​
67
Assigned
Yes
Official
​Bootstrap Protocol (BOOTP) server; also used by Dynamic Host Configuration Protocol (DHCP)
​
68
Assigned
Yes
Official
Bootstrap Protocol (BOOTP) client; also used by Dynamic Host Configuration Protocol (DHCP)
​
69
Assigned
Yes
Official
​Trivial File Transfer Protocol (TFTP)
​
70
Yes
Assigned
Official
​Gopher protocol
​
71–74
Yes
Yes
Official
​NETRJS protocol
​
79
Yes
Assigned
Official
​Finger protocol​
​
80
Yes
Assigned
Official
​Hypertext Transfer Protocol (HTTP)
Yes
No
Yes
Unofficial
​QUIC, a transport protocol over UDP (still in draft as of April 2020), using stream multiplexing, encryption by default with TLS, and currently supporting HTTP/2. QUIC has been renamed to HTTP/3, which is currently an Internet Draft.
​
​
82
​
Yes
Unofficial
​TorPark control
​
83
Yes
Assigned
Official
MIT ML Device, networking file system
​
88
Yes
Assigned
Official
​Kerberos authentication system
​
90
Yes
Yes
Unofficial
​PointCast (dotcom)​
​
95
Yes
Assigned
Official
SUPDUP, terminal-independent remote login
​
101
Yes
Assigned
Official
​NIC host name​
​
102
Yes
Assigned
Official
​ISO Transport Service Access Point (TSAP) Class 0 protocol
​
104
Yes
Yes
Official
​Digital Imaging and Communications in Medicine (DICOM; also port 11112)
​
105
Yes
Yes
Official
​CCSO Nameserver​
​
107
Yes
Yes
Official
​Remote User Telnet Service (RTelnet)
​
108
Yes
Yes
Official
IBM Systems Network Architecture (SNA) gateway access server
​
109
Yes
Assigned
Official
​Post Office Protocol, version 2 (POP2)
​
110
Yes
Assigned
Official
Post Office Protocol, version 3 (POP3)
​
111
Yes
Yes
Official
​Open Network Computing Remote Procedure Call (ONC RPC, sometimes referred to as Sun RPC)
​
113
Yes
No
Official
​Ident, authentication service/identification protocol, used by IRC servers to identify users
​
Yes
Assigned
Official
Authentication Service (auth), the predecessor to identification protocol. Used to determine a user's identity of a particular TCP connection.
​
​
115
Yes
Assigned
Official
​Simple File Transfer Protocol​
​
117
Yes
Yes
Official
​UUCP Mapping Project (path service)
​
118
Yes
Yes
Official
Structured Query Language (SQL) Services
​
119
Yes
Assigned
Official
​Network News Transfer Protocol (NNTP), retrieval of newsgroup messages
​
123
Assigned
Yes
Official
​Network Time Protocol (NTP), used for time synchronization
​
126
Yes
Yes
Official
Formerly Unisys Unitary Login, renamed by Unisys to NXEdit. Used by Unisys Programmer's Workbench for Clearpath MCP, an IDE for Unisys MCP software development​
​
135
Yes
Yes
Official
​DCE endpoint resolution
​
Yes
Yes
Official
​Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service,[67] used to remotely manage services including DHCP server, DNS server and WINS. Also used by DCOM​
​
​
137
Yes
Yes
Official
​NetBIOS Name Service, used for name registration and resolution​
​
138
Assigned
Yes
Official
NetBIOS Datagram Service
​
139
Yes
Assigned
Official
NetBIOS Session Service
​
143
Yes
Assigned
Official
​Internet Message Access Protocol (IMAP),management of electronic mail messages on a server
​
152
Yes
Yes
Official
​Background File Transfer Program (BFTP)
​
153
Yes
Yes
Official
​Simple Gateway Monitoring Protocol (SGMP), a protocol for remote inspection and alteration of gateway management information
​
156
Yes
Yes
Official
Structured Query Language (SQL) Service
​
158
Yes
Yes
Official
​Distributed Mail System Protocol (DMSP, sometimes referred to as Pcmail)
​
161
Assigned
Yes
Official
​Simple Network Management Protocol (SNMP)
​
162
Yes
Yes
Official
​Simple Network Management Protocol Trap (SNMPTRAP)
​
170
Yes
Yes
Official
Network PostScript print server​
​
177
Yes
Yes
Official
​X Display Manager Control Protocol (XDMCP), used for remote logins to an X Display Manager server
​
179
Yes
Assigned
Official
​Border Gateway Protocol (BGP),[77] used to exchange routing and reachability information among autonomous systems (AS) on the Internet​
Yes
194
Yes
Yes
Official
​Internet Relay Chat (IRC)
​
199
Yes
Yes
Official
​SNMP Unix Multiplexer (SMUX)
​
201
Yes
Yes
Official
​AppleTalk Routing Maintenance
​
209
Yes
Assigned
Official
​Quick Mail Transfer Protocol​
​
210
Yes
Yes
Official
​ANSI Z39.50​
​
213
Yes
Yes
Official
​Internetwork Packet Exchange (IPX)
​
218
Yes
Yes
Official
Message posting protocol (MPP)
​
220
Yes
Yes
Official
​Internet Message Access Protocol (IMAP), version 3
​
225–241
Reserved
Reserved
Official
​
​
249–255
Reserved
Reserved
Official
​
​
259
Yes
Yes
Official
Efficient Short Remote Operations (ESRO)
​
262
Yes
Yes
Official
Arcisdms
​
264
Yes
Yes
Official
​Border Gateway Multicast Protocol (BGMP)
​
280
Yes
Yes
Official
http-mgmt
​
300
Yes
​
Unofficial
​ThinLinc Web Access
​
308
Yes
​
Official
Novastor Online Backup
​
311
Yes
Assigned
Official
​Mac OS X Server Admin (officially AppleShare IP Web administration)
​
318
Yes
Yes
Official
PKIX Time Stamp Protocol (TSP)
​
319
​
Yes
Official
​Precision Time Protocol (PTP) event messages
​
320
​
Yes
Official
​Precision Time Protocol (PTP) general messages
​
350
Yes
Yes
Official
​Mapping of Airline Traffic over Internet Protocol (MATIP) type A
​
351
Yes
Yes
Official
MATIP type B
​
356
Yes
Yes
Official
cloanto-net-1 (used by Cloanto Amiga Explorer and VMs)
​
366
Yes
Yes
Official
On-Demand Mail Relay (ODMR)
​
369
Yes
Yes
Official
Rpc2portmap
​
370
Yes
Yes
Official
codaauth2, Coda authentication server
​
​
Yes
Official
securecast1, outgoing packets to NAI's SecureCast servers. As of 2000
​
​
371
Yes
Yes
Official
ClearCase albd
​
383
Yes
Yes
Official
HP data alarm manager
​
384
Yes
Yes
Official
A Remote Network Server System
​
387
Yes
Yes
Official
AURP (AppleTalk Update-based Routing Protocol)
​
388
Yes
Assigned
Official
​Unidata LDM near real-time data distribution protocol
​
389
Yes
Assigned
Official
​Lightweight Directory Access Protocol (LDAP)
​
399
Yes
Yes
Official
​Digital Equipment Corporation DECnet+ (Phase V) over TCP/IP (RFC1859)
​
401
Yes
Yes
Official
​Uninterruptible power supply (UPS)
​
427
Yes
Yes
Official
​Service Location Protocol (SLP)[10]​
​
433
Yes

Port	TCP	UDP	IANA status	Description	SCTP
0	Reserved	Reserved	Official
N/A	N/A	Unofficial	In programming APIs (not in communication between hosts), requests a system-allocated (dynamic) port
1	Yes	Assigned	Official	TCP Port Service Multiplexer (TCPMUX). Historic. Both TCP and UDP have been assigned to TCPMUX by IANA, but by design only TCP is specified.
5	Assigned	Assigned	Official	Remote Job Entry was historically using socket 5 in its old socket form, while MIB PIM has identified it as TCP/5 and IANA has assigned both TCP and UDP 5 to it.
7	Yes	Yes	Official	Echo Protocol
9	Yes	Yes	Official	Discard Protocol	Yes
No	Yes	Unofficial	Wake-on-LAN
11	Yes	Yes	Official	Active Users (systat service)
13	Yes	Yes	Official	Daytime Protocol
15	Yes	No	Unofficial	Previously netstat servic
17	Yes	Yes	Official	Quote of the Day (QOTD)
18	Yes	Yes	Official	Message Send Protocol
19	Yes	Yes	Official	Character Generator Protocol (CHARGEN)
20	Yes	Assigned	Official	File Transfer Protocol (FTP) data transfer	Yes
21	Yes	Assigned	Official	File Transfer Protocol (FTP) control (command)	Yes
22	Yes	Assigned	Official	Secure Shell (SSH), secure logins, file transfers (scp, sftp) and port forwarding	Yes
23	Yes	Assigned	Official	Telnet protocol—unencrypted text communications
25	Yes	Assigned	Official	Simple Mail Transfer Protocol (SMTP), used for email routing between mail servers
37	Yes	Yes	Official	Time Protocol
42	Assigned	Yes	Official	Host Name Server Protocol
43	Yes	Assigned	Official	WHOIS protocol
47	Reserved	Reserved	Official
49	Yes	Yes	Official	TACACS Login Host protocol. TACACS+, still in draft which is an improved but distinct version of TACACS, only uses TCP 49.
51	Reserved	Reserved	Official	Historically used for Interface Message Processor logical address management, entry has been removed by IANA on 2013-05-25
52	Assigned	Assigned	Official	Xerox Network Systems (XNS) Time Protocol. Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.
53	Yes	Yes	Official	Domain Name System (DNS)
54	Assigned	Assigned	Official	Xerox Network Systems (XNS) Clearinghouse (Name Server). Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.
56	Assigned	Assigned	Official	Xerox Network Systems (XNS) Authentication Protocol. Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.
58	Assigned	Assigned	Official	Xerox Network Systems (XNS) Mail. Despite this port being assigned by IANA, the service is meant to work on SPP (ancestor of IPX/SPX), instead of TCP/IP.
61	Reserved	Reserved	Official	Historically assigned to the NIFTP-Based Mail protocol, but was never documented in the related IEN. The port number entry was removed from IANA's registry on 2017-05-18.
67	Assigned	Yes	Official	Bootstrap Protocol (BOOTP) server; also used by Dynamic Host Configuration Protocol (DHCP)
68	Assigned	Yes	Official	Bootstrap Protocol (BOOTP) client; also used by Dynamic Host Configuration Protocol (DHCP)
69	Assigned	Yes	Official	Trivial File Transfer Protocol (TFTP)
70	Yes	Assigned	Official	Gopher protocol
71–74	Yes	Yes	Official	NETRJS protocol
79	Yes	Assigned	Official	Finger protocol
80	Yes	Assigned	Official	Hypertext Transfer Protocol (HTTP)	Yes
No	Yes	Unofficial	QUIC, a transport protocol over UDP (still in draft as of April 2020), using stream multiplexing, encryption by default with TLS, and currently supporting HTTP/2. QUIC has been renamed to HTTP/3, which is currently an Internet Draft.
82		Yes	Unofficial	TorPark control
83	Yes	Assigned	Official	MIT ML Device, networking file system
88	Yes	Assigned	Official	Kerberos authentication system
90	Yes	Yes	Unofficial	PointCast (dotcom)
95	Yes	Assigned	Official	SUPDUP, terminal-independent remote login
101	Yes	Assigned	Official	NIC host name
102	Yes	Assigned	Official	ISO Transport Service Access Point (TSAP) Class 0 protocol
104	Yes	Yes	Official	Digital Imaging and Communications in Medicine (DICOM; also port 11112)
105	Yes	Yes	Official	CCSO Nameserver
107	Yes	Yes	Official	Remote User Telnet Service (RTelnet)
108	Yes	Yes	Official	IBM Systems Network Architecture (SNA) gateway access server
109	Yes	Assigned	Official	Post Office Protocol, version 2 (POP2)
110	Yes	Assigned	Official	Post Office Protocol, version 3 (POP3)
111	Yes	Yes	Official	Open Network Computing Remote Procedure Call (ONC RPC, sometimes referred to as Sun RPC)
113	Yes	No	Official	Ident, authentication service/identification protocol, used by IRC servers to identify users
Yes	Assigned	Official	Authentication Service (auth), the predecessor to identification protocol. Used to determine a user's identity of a particular TCP connection.
115	Yes	Assigned	Official	Simple File Transfer Protocol
117	Yes	Yes	Official	UUCP Mapping Project (path service)
118	Yes	Yes	Official	Structured Query Language (SQL) Services
119	Yes	Assigned	Official	Network News Transfer Protocol (NNTP), retrieval of newsgroup messages
123	Assigned	Yes	Official	Network Time Protocol (NTP), used for time synchronization
126	Yes	Yes	Official	Formerly Unisys Unitary Login, renamed by Unisys to NXEdit. Used by Unisys Programmer's Workbench for Clearpath MCP, an IDE for Unisys MCP software development
135	Yes	Yes	Official	DCE endpoint resolution
Yes	Yes	Official	Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service,[67] used to remotely manage services including DHCP server, DNS server and WINS. Also used by DCOM
137	Yes	Yes	Official	NetBIOS Name Service, used for name registration and resolution
138	Assigned	Yes	Official	NetBIOS Datagram Service
139	Yes	Assigned	Official	NetBIOS Session Service
143	Yes	Assigned	Official	Internet Message Access Protocol (IMAP),management of electronic mail messages on a server
152	Yes	Yes	Official	Background File Transfer Program (BFTP)
153	Yes	Yes	Official	Simple Gateway Monitoring Protocol (SGMP), a protocol for remote inspection and alteration of gateway management information
156	Yes	Yes	Official	Structured Query Language (SQL) Service
158	Yes	Yes	Official	Distributed Mail System Protocol (DMSP, sometimes referred to as Pcmail)
161	Assigned	Yes	Official	Simple Network Management Protocol (SNMP)
162	Yes	Yes	Official	Simple Network Management Protocol Trap (SNMPTRAP)
170	Yes	Yes	Official	Network PostScript print server
177	Yes	Yes	Official	X Display Manager Control Protocol (XDMCP), used for remote logins to an X Display Manager server
179	Yes	Assigned	Official	Border Gateway Protocol (BGP),[77] used to exchange routing and reachability information among autonomous systems (AS) on the Internet	Yes
194	Yes	Yes	Official	Internet Relay Chat (IRC)
199	Yes	Yes	Official	SNMP Unix Multiplexer (SMUX)
201	Yes	Yes	Official	AppleTalk Routing Maintenance
209	Yes	Assigned	Official	Quick Mail Transfer Protocol
210	Yes	Yes	Official	ANSI Z39.50
213	Yes	Yes	Official	Internetwork Packet Exchange (IPX)
218	Yes	Yes	Official	Message posting protocol (MPP)
220	Yes	Yes	Official	Internet Message Access Protocol (IMAP), version 3
225–241	Reserved	Reserved	Official
249–255	Reserved	Reserved	Official
259	Yes	Yes	Official	Efficient Short Remote Operations (ESRO)
262	Yes	Yes	Official	Arcisdms
264	Yes	Yes	Official	Border Gateway Multicast Protocol (BGMP)
280	Yes	Yes	Official	http-mgmt
300	Yes		Unofficial	ThinLinc Web Access
308	Yes		Official	Novastor Online Backup
311	Yes	Assigned	Official	Mac OS X Server Admin (officially AppleShare IP Web administration)
318	Yes	Yes	Official	PKIX Time Stamp Protocol (TSP)
319		Yes	Official	Precision Time Protocol (PTP) event messages
320		Yes	Official	Precision Time Protocol (PTP) general messages
350	Yes	Yes	Official	Mapping of Airline Traffic over Internet Protocol (MATIP) type A
351	Yes	Yes	Official	MATIP type B
356	Yes	Yes	Official	cloanto-net-1 (used by Cloanto Amiga Explorer and VMs)
366	Yes	Yes	Official	On-Demand Mail Relay (ODMR)
369	Yes	Yes	Official	Rpc2portmap
370	Yes	Yes	Official	codaauth2, Coda authentication server
	Yes	Official	securecast1, outgoing packets to NAI's SecureCast servers. As of 2000
371	Yes	Yes	Official	ClearCase albd
383	Yes	Yes	Official	HP data alarm manager
384	Yes	Yes	Official	A Remote Network Server System
387	Yes	Yes	Official	AURP (AppleTalk Update-based Routing Protocol)
388	Yes	Assigned	Official	Unidata LDM near real-time data distribution protocol
389	Yes	Assigned	Official	Lightweight Directory Access Protocol (LDAP)
399	Yes	Yes	Official	Digital Equipment Corporation DECnet+ (Phase V) over TCP/IP (RFC1859)
401	Yes	Yes	Official	Uninterruptible power supply (UPS)
427	Yes	Yes	Official	Service Location Protocol (SLP)[10]
433	Yes