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Reference Tables

Common Network Ports

A quick reference for frequently encountered network services.

ValueNameDescription
20/21 TCPFTPFile transfer data and control.
22 TCPSSHSecure shell and SFTP.
23 TCPTelnetUnencrypted remote terminal.
25 TCPSMTPMail transfer between servers.
53 TCP/UDPDNSDomain name resolution.
67/68 UDPDHCPDynamic host configuration.
80 TCPHTTPUnencrypted web traffic.
110 TCPPOP3Mail retrieval.
123 UDPNTPNetwork time synchronization.
143 TCPIMAPMailbox access and synchronization.
161/162 UDPSNMPNetwork monitoring and traps.
389 TCP/UDPLDAPDirectory services.
443 TCPHTTPSHTTP over TLS.
445 TCPSMBWindows file and printer sharing.
465 TCPSMTPSSMTP over implicit TLS.
587 TCPSMTP SubmissionAuthenticated mail submission.
636 TCPLDAPSLDAP over TLS.
993 TCPIMAPSIMAP over TLS.
995 TCPPOP3SPOP3 over TLS.
1433 TCPMicrosoft SQL ServerSQL Server database connections.
1521 TCPOracle DatabaseOracle database listener.
2049 TCP/UDPNFSNetwork file system.
3306 TCPMySQLMySQL database connections.
3389 TCP/UDPRDPRemote Desktop Protocol.
5432 TCPPostgreSQLPostgreSQL database connections.
6379 TCPRedisRedis data store.
8080 TCPHTTP AlternateCommon alternate HTTP port.
27017 TCPMongoDBMongoDB database connections.

Source: IANA Service Name and Port Number RegistryReviewed: 2026-07-11

How to use Common Network Ports

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Common Network Ports FAQ

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