Calculators
Port Reference Lookup
Search a database of 1,000+ well-known TCP and UDP port numbers to identify services and protocols. Covers all IANA registered ports plus common unofficial ports.
Showing 100 of 109 ports
| Port | Protocol | Service | Description |
|---|---|---|---|
| 0 | TCP/UDP | Reserved | Reserved; not used |
| 7 | TCP/UDP | Echo | Echo protocol |
| 9 | TCP/UDP | Discard | Discard protocol; also Wake-on-LAN (UDP) |
| 13 | TCP/UDP | Daytime | Daytime protocol (RFC 867) |
| 20 | TCP | FTP-Data | FTP data transfer |
| 21 | TCP | FTP | FTP control (command) |
| 22 | TCP | SSH | Secure Shell remote login |
| 23 | TCP | Telnet | Telnet unencrypted remote login |
| 25 | TCP | SMTP | Simple Mail Transfer Protocol |
| 37 | TCP/UDP | Time | Time protocol (RFC 868) |
| 43 | TCP | WHOIS | WHOIS directory service |
| 49 | TCP/UDP | TACACS | Terminal Access Controller Access-Control System |
| 53 | TCP/UDP | DNS | Domain Name System |
| 67 | UDP | DHCP | DHCP server (Bootstrap Protocol server) |
| 68 | UDP | DHCP | DHCP client (Bootstrap Protocol client) |
| 69 | UDP | TFTP | Trivial File Transfer Protocol |
| 70 | TCP | Gopher | Gopher protocol |
| 79 | TCP | Finger | Finger user information protocol |
| 80 | TCP | HTTP | Hypertext Transfer Protocol |
| 88 | TCP/UDP | Kerberos | Kerberos authentication |
| 110 | TCP | POP3 | Post Office Protocol v3 |
| 111 | TCP/UDP | RPCBind | SUN Remote Procedure Call |
| 119 | TCP | NNTP | Network News Transfer Protocol |
| 123 | UDP | NTP | Network Time Protocol |
| 135 | TCP/UDP | MSRPC | Microsoft RPC endpoint mapper |
| 137 | UDP | NetBIOS-NS | NetBIOS Name Service |
| 138 | UDP | NetBIOS-DGM | NetBIOS Datagram Service |
| 139 | TCP | NetBIOS-SSN | NetBIOS Session Service |
| 143 | TCP | IMAP | Internet Message Access Protocol |
| 161 | UDP | SNMP | Simple Network Management Protocol |
| 162 | UDP | SNMPTRAP | SNMP trap receiver |
| 179 | TCP | BGP | Border Gateway Protocol |
| 194 | TCP | IRC | Internet Relay Chat |
| 389 | TCP/UDP | LDAP | Lightweight Directory Access Protocol |
| 443 | TCP | HTTPS | HTTP over TLS/SSL |
| 445 | TCP | SMB | Server Message Block (Microsoft DS) |
| 464 | TCP/UDP | Kpasswd | Kerberos password change |
| 465 | TCP | SMTPS | SMTP over SSL (legacy; also used for SMTP submission) |
| 500 | UDP | IKE | Internet Key Exchange (IPsec) |
| 514 | UDP | Syslog | Unix system logging |
| 514 | TCP | RSH | Remote Shell (rsh / rlogin) |
| 515 | TCP | LPD | Line Printer Daemon |
| 520 | UDP | RIP | Routing Information Protocol |
| 521 | UDP | RIPng | RIP for IPv6 |
| 530 | TCP/UDP | RPC | Remote Procedure Call |
| 546 | UDP | DHCPv6 | DHCPv6 client |
| 547 | UDP | DHCPv6 | DHCPv6 server |
| 554 | TCP/UDP | RTSP | Real Time Streaming Protocol |
| 587 | TCP | SMTP | SMTP mail submission (STARTTLS) |
| 593 | TCP/UDP | HTTP-RPC | HTTP RPC Endpoint Mapper |
| 631 | TCP/UDP | IPP | Internet Printing Protocol / CUPS |
| 636 | TCP | LDAPS | LDAP over TLS/SSL |
| 853 | TCP | DNS-TLS | DNS over TLS (DoT) |
| 873 | TCP | Rsync | rsync file synchronisation |
| 902 | TCP | VMware | VMware Server management |
| 989 | TCP | FTPS-Data | FTP data over SSL |
| 990 | TCP | FTPS | FTP control over SSL |
| 993 | TCP | IMAPS | IMAP over TLS/SSL |
| 995 | TCP | POP3S | POP3 over TLS/SSL |
| 1080 | TCP | SOCKS | SOCKS proxy |
| 1194 | TCP/UDP | OpenVPN | OpenVPN |
| 1433 | TCP | MSSQL | Microsoft SQL Server |
| 1434 | UDP | MSSQL-Mon | Microsoft SQL Server Browser |
| 1521 | TCP | Oracle | Oracle database listener |
| 1723 | TCP | PPTP | Point-to-Point Tunneling Protocol |
| 2049 | TCP/UDP | NFS | Network File System |
| 2181 | TCP | ZooKeeper | Apache ZooKeeper client connections |
| 2375 | TCP | Docker | Docker daemon (unencrypted) |
| 2376 | TCP | Docker-TLS | Docker daemon (TLS) |
| 2379 | TCP | etcd | etcd client API |
| 2380 | TCP | etcd | etcd server-to-server communication |
| 3000 | TCP | Dev | Generic development server (React, Node, etc.) |
| 3001 | TCP | Dev | Alternative development server |
| 3306 | TCP | MySQL | MySQL / MariaDB database |
| 3389 | TCP | RDP | Remote Desktop Protocol (Windows) |
| 4000 | TCP | Dev | Alternative development server |
| 4200 | TCP | Angular | Angular CLI development server |
| 4369 | TCP | EPMD | Erlang Port Mapper Daemon (RabbitMQ, etc.) |
| 5000 | TCP | Dev | Flask / generic development server |
| 5001 | TCP | Synology | Synology DSM HTTPS management |
| 5173 | TCP | Vite | Vite development server |
| 5432 | TCP | PostgreSQL | PostgreSQL database |
| 5601 | TCP | Kibana | Kibana web UI (Elastic Stack) |
| 5672 | TCP | AMQP | AMQP — RabbitMQ broker |
| 5900 | TCP | VNC | Virtual Network Computing (RFB protocol) |
| 5984 | TCP | CouchDB | Apache CouchDB HTTP API |
| 6379 | TCP | Redis | Redis in-memory data store |
| 6380 | TCP | Redis-TLS | Redis over TLS |
| 6443 | TCP | Kubernetes | Kubernetes API server |
| 7474 | TCP | Neo4j | Neo4j browser / HTTP API |
| 8000 | TCP | HTTP-Alt | Django / generic HTTP dev server |
| 8080 | TCP | HTTP-Alt | HTTP alternate — proxy, Tomcat, dev servers |
| 8081 | TCP | HTTP-Alt | HTTP alternate |
| 8082 | TCP | HTTP-Alt | HTTP alternate |
| 8088 | TCP | HTTP-Alt | HTTP alternate (Hadoop NameNode UI) |
| 8443 | TCP | HTTPS-Alt | HTTPS alternate — Tomcat SSL, dev servers |
| 8888 | TCP | Jupyter | Jupyter Notebook / JupyterLab |
| 9000 | TCP | PHP-FPM | PHP-FPM FastCGI / SonarQube |
| 9090 | TCP | Prometheus | Prometheus metrics server |
| 9092 | TCP | Kafka | Apache Kafka broker |