Top 1000 Well Known Ports

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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
Yes
Official
NNSP, part of Network News Transfer Protocol​
​
434
Yes
Yes
Official
​Mobile IP Agent (RFC 5944)
​
443
Yes
Assigned
Official
​Hypertext Transfer Protocol over TLS/SSL (HTTPS)
Yes
No
Yes
Unofficial
​Quick UDP Internet Connections (QUIC), a transport protocol over UDP (still in draft as of July 2018), using stream multiplexing, encryption by default with TLS, and currently supporting HTTP/2.
​
​
444
Yes
Yes
Official
​Simple Network Paging Protocol (SNPP), RFC 1568​
​
445
Yes
Yes
Official
Microsoft-DS (Directory Services) Active Directory, Windows shares
​
Yes
Assigned
Official
Microsoft-DS (Directory Services) SMB file sharing
​
​
464
Yes
Yes
Official
​Kerberos Change/Set password
​
465
Yes
No
Official
URL Rendezvous Directory for SSM (Cisco protocol)[importance?]
​
Yes
No
Official
Authenticated SMTP over TLS/SSL (SMTPS)
​
​
475
Yes
Yes
Official
tcpnethaspsrv, Aladdin Knowledge Systems Hasp services
​
491
Yes
​
Unofficial
​GO-Global remote access and application publishing software​
​
497
Yes
Yes
Official
​Retrospect​
​
500
Assigned
Yes
Official
​Internet Security Association and Key Management Protocol (ISAKMP) / Internet Key Exchange (IKE)
​
502
Yes
Yes
Official
​Modbus Protocol
​
504
Yes
Yes
Official
​Citadel, multiservice protocol for dedicated clients for the Citadel groupware system
​
510
Yes
Yes
Official
FirstClass Protocol (FCP), used by FirstClass client/server groupware system
​
512
Yes
​
Official
​Rexec, Remote Process Execution
​
​
Yes
Official
comsat, together with biff​
​
​
513
Yes
​
Official
​rlogin​
​
​
Yes
Official
Who
​
​
514
Yes
​
Unofficial
​Remote Shell, used to execute non-interactive commands on a remote system (Remote Shell, rsh, remsh)
​
No
Yes
Official
​Syslog, used for system logging
​
​
515
Yes
Assigned
Official
​Line Printer Daemon (LPD),[10] print service
​
517
​
Yes
Official
Talk
​
518
​
Yes
Official
NTalk
​
520
Yes
​
Official
efs, extended file name server
​
​
Yes
Official
​Routing Information Protocol (RIP)
​
​
521
​
Yes
Official
​Routing Information Protocol Next Generation (RIPng)
​
524
Yes
Yes
Official
​NetWare Core Protocol (NCP) is used for a variety things such as access to primary NetWare server resources, Time Synchronization, etc.
​
525
​
Yes
Official
Timed, Timeserver​
​
530
Yes
Yes
Official
​Remote procedure call (RPC)
​
532
Yes
Assigned
Official
netnews
​
533
​
Yes
Official
netwall, For Emergency Broadcasts
​
540
Yes
​
Official
Unix-to-Unix Copy Protocol (UUCP)
​
542
Yes
Yes
Official
​commerce (Commerce Applications)
​
543
Yes
​
Official
klogin, Kerberos login
​
544
Yes
​
Official
kshell, Kerberos Remote shell
​
546
Yes
Yes
Official
​DHCPv6 client
​
547
Yes
Yes
Official
​DHCPv6 server
​
548
Yes
Assigned
Official
​Apple Filing Protocol (AFP) over TCP​
​
550
Yes
Yes
Official
new-rwho, new-who
​
554
Yes
Yes
Official
​Real Time Streaming Protocol (RTSP)
​
556
Yes
​
Official
Remotefs, RFS, rfs_server
​
560
​
Yes
Official
rmonitor, Remote Monitor
​
561
​
Yes
Official
monitor
​
563
Yes
Yes
Official
​NNTP over TLS/SSL (NNTPS)
​
564
Yes
​
Unofficial
​9P (Plan 9)
​
585
Port 993
?
Unofficial
Legacy use of Internet Message Access Protocol over TLS/SSL (IMAPS), now in use at port 993.
​
587
Yes
Assigned
Official
​email message submission (SMTP)
​
591
Yes
​
Official
​FileMaker 6.0 (and later) Web Sharing (HTTP Alternate, also see port 80)
​
593
Yes
Yes
Official
HTTP RPC Ep Map, Remote procedure call over Hypertext Transfer Protocol, often used by Distributed Component Object Model services and Microsoft Exchange Server​
​
601
Yes
​
Official
Reliable Syslog Service — used for system logging
​
604
Yes
​
Official
TUNNEL profile, a protocol for BEEP peers to form an application layer tunnel​
​
623
​
Yes
Official
ASF Remote Management and Control Protocol (ASF-RMCP) & IPMI Remote Management Protocol
​
625
Yes
No
Unofficial
Open Directory Proxy (ODProxy)
​
631
Yes
Yes
Official
​Internet Printing Protocol (IPP)
​
Yes
Yes
Unofficial
​Common Unix Printing System (CUPS) administration console (extension to IPP)
​
​
635
Yes
Yes
Official
RLZ DBase
​
636
Yes
Assigned
Official
​Lightweight Directory Access Protocol over TLS/SSL (LDAPS)
​
639
Yes
Yes
Official
MSDP, Multicast Source Discovery Protocol​
​
641
Yes
Yes
Official
SupportSoft Nexus Remote Command (control/listening), a proxy gateway connecting remote control traffic
​
643
Yes
Yes
Official
SANity
​
646
Yes
Yes
Official
​Label Distribution Protocol (LDP), a routing protocol used in MPLS networks
​
647
Yes
​
Official
​DHCP Failover protocol
​
648
Yes
​
Official
Registry Registrar Protocol (RRP)
​
651
Yes
Yes
Official
IEEE-MMS
​
653
Yes
Yes
Official
SupportSoft Nexus Remote Command (data), a proxy gateway connecting remote control traffic
​
654
Yes
​
Official
Media Management System (MMS) Media Management Protocol (MMP)
​
655
Yes
Yes
Official
​Tinc VPN daemon
​
657
Yes
Yes
Official
​IBM RMC (Remote monitoring and Control) protocol, used by System p5 AIX Integrated Virtualization Manager (IVM) and Hardware Management Console to connect managed logical partitions (LPAR) to enable dynamic partition reconfiguration
​
660
Yes
Assigned
Official
​Mac OS X Server administration, version 10.4 and earlier
​
​666​
Yes
Yes
Official
​Doom, first online first-person shooter​
​
Yes
​
Unofficial
​airserv-ng, aircrack-ng's server for remote-controlling wireless devices
​
​
674
Yes
​
Official
​Application Configuration Access Protocol (ACAP)
​
688
Yes
Yes
Official
REALM-RUSD (ApplianceWare Server Appliance Management Protocol)
​
690
Yes
Yes
Official
Velneo Application Transfer Protocol (VATP)
​
691
Yes
​
Official
​MS Exchange Routing
​
694