Network Tools
Developer network utilities — port reference, CIDR calculator, IP class info, and MAC address lookup. All computations run client-side; no data is sent to any server.
60+ well-known port numbers with protocol and description
Showing 61 of 61 ports
| Port | Protocol | Service | Description |
|---|---|---|---|
| 20 | TCP | FTP-Data | File Transfer Protocol — data channel |
| 21 | TCP | FTP | File Transfer Protocol — control channel |
| 22 | TCP | SSH | Secure Shell — encrypted remote login and command execution |
| 23 | TCP | Telnet | Unencrypted text communications; largely deprecated |
| 25 | TCP | SMTP | Simple Mail Transfer Protocol — email sending |
| 53 | TCP/UDP | DNS | Domain Name System — hostname resolution |
| 67 | UDP | DHCP | Dynamic Host Configuration Protocol — server port |
| 68 | UDP | DHCP | Dynamic Host Configuration Protocol — client port |
| 69 | UDP | TFTP | Trivial File Transfer Protocol — simple file transfers |
| 80 | TCP | HTTP | Hypertext Transfer Protocol — unencrypted web traffic |
| 110 | TCP | POP3 | Post Office Protocol v3 — email retrieval |
| 119 | TCP | NNTP | Network News Transfer Protocol — Usenet newsgroups |
| 123 | UDP | NTP | Network Time Protocol — clock synchronization |
| 143 | TCP | IMAP | Internet Message Access Protocol — email access |
| 161 | UDP | SNMP | Simple Network Management Protocol — network monitoring |
| 162 | UDP | SNMP Trap | SNMP trap messages from agents to manager |
| 179 | TCP | BGP | Border Gateway Protocol — inter-AS routing |
| 194 | TCP | IRC | Internet Relay Chat |
| 389 | TCP | LDAP | Lightweight Directory Access Protocol |
| 443 | TCP | HTTPS | HTTP over TLS/SSL — encrypted web traffic |
| 445 | TCP | SMB | Server Message Block — Windows file sharing |
| 465 | TCP | SMTPS | SMTP over TLS — encrypted email sending (legacy) |
| 500 | UDP | IKE | Internet Key Exchange — IPsec VPN negotiation |
| 514 | UDP | Syslog | System logging messages |
| 515 | TCP | LPD | Line Printer Daemon — print spooler |
| 587 | TCP | SMTP (Sub) | SMTP submission port — authenticated email sending |
| 631 | TCP | IPP | Internet Printing Protocol — CUPS print server |
| 636 | TCP | LDAPS | LDAP over TLS/SSL |
| 993 | TCP | IMAPS | IMAP over TLS/SSL — secure email access |
| 995 | TCP | POP3S | POP3 over TLS/SSL — secure email retrieval |
| 1080 | TCP | SOCKS | SOCKS proxy protocol |
| 1194 | UDP | OpenVPN | OpenVPN default port |
| 1433 | TCP | MSSQL | Microsoft SQL Server database |
| 1521 | TCP | Oracle DB | Oracle Database listener |
| 1723 | TCP | PPTP | Point-to-Point Tunneling Protocol — VPN |
| 2049 | TCP | NFS | Network File System |
| 2181 | TCP | ZooKeeper | Apache ZooKeeper coordination service |
| 3000 | TCP | Dev Server | Common default for Node.js/React dev servers |
| 3306 | TCP | MySQL | MySQL / MariaDB database server |
| 3389 | TCP | RDP | Remote Desktop Protocol — Windows remote desktop |
| 4200 | TCP | Angular | Angular CLI default development server |
| 5000 | TCP | Dev Server | Common default for Flask / various dev servers |
| 5173 | TCP | Vite | Vite development server default port |
| 5432 | TCP | PostgreSQL | PostgreSQL database server |
| 5601 | TCP | Kibana | Elastic Kibana web UI |
| 5672 | TCP | AMQP | RabbitMQ / Advanced Message Queuing Protocol |
| 6379 | TCP | Redis | Redis in-memory data store |
| 6443 | TCP | K8s API | Kubernetes API server |
| 8000 | TCP | HTTP Alt | Common alternative HTTP / Django dev server |
| 8080 | TCP | HTTP Alt | Common HTTP alternative — Tomcat, proxies |
| 8443 | TCP | HTTPS Alt | Common HTTPS alternative port |
| 8888 | TCP | Jupyter | Jupyter Notebook default port |
| 9000 | TCP | SonarQube | SonarQube code quality server |
| 9090 | TCP | Prometheus | Prometheus metrics server |
| 9200 | TCP | Elasticsearch | Elasticsearch REST API |
| 9300 | TCP | ES Cluster | Elasticsearch inter-node communication |
| 9418 | TCP | Git | Git protocol — native git daemon |
| 11211 | TCP | Memcached | Memcached in-memory caching server |
| 15672 | TCP | RabbitMQ UI | RabbitMQ management web interface |
| 27017 | TCP | MongoDB | MongoDB document database server |
| 50070 | TCP | HDFS | Hadoop HDFS NameNode web UI |