Port Checker

Check whether a specific TCP port is open or closed on any host.

Port Checker

Host or IP Address

Port (1–65535)

Quick Ports

Browser limitation: True TCP port checking requires server-side connections. Results are fetched via portchecker.co API. For reliable checks, use nmap -p PORT HOST or nc -zv HOST PORT locally.

Enter host and port to check

Check if a TCP port is open on any host.

Common Ports Reference

Port	Service	Proto	Description
21	FTP	TCP	File Transfer Protocol
22	SSH	TCP	Secure Shell
23	Telnet	TCP	Telnet protocol
25	SMTP	TCP	Simple Mail Transfer Protocol
53	DNS	TCP/UDP	Domain Name System
80	HTTP	TCP	Hypertext Transfer Protocol
110	POP3	TCP	Post Office Protocol v3
143	IMAP	TCP	Internet Message Access Protocol
443	HTTPS	TCP	HTTP Secure
465	SMTPS	TCP	SMTP over TLS
587	SMTP	TCP	SMTP (submission)
993	IMAPS	TCP	IMAP over TLS
995	POP3S	TCP	POP3 over TLS
1433	MSSQL	TCP	Microsoft SQL Server
3000	Node.js	TCP	Common Node.js dev port
3306	MySQL	TCP	MySQL Database
3389	RDP	TCP	Remote Desktop Protocol
4000	Dev	TCP	Common dev server port
5000	Flask	TCP	Common Flask/dev port
5432	PostgreSQL	TCP	PostgreSQL Database
5672	RabbitMQ	TCP	AMQP (RabbitMQ)
6379	Redis	TCP	Redis in-memory store
8080	HTTP-Alt	TCP	Alternative HTTP port
8443	HTTPS-Alt	TCP	Alternative HTTPS port
9200	Elasticsearch	TCP	Elasticsearch REST API
27017	MongoDB	TCP	MongoDB Database

Host—

Port—

Service—