Open Port Checker

Guide: how to use

Step-by-step instructions in the blog

Open Port Checker

Check if a specific port is open or closed on a remote host

Host / Domain

Port Number

Common Ports

FTP

SSH

Telnet

SMTP

DNS

HTTP

110

POP3

143

IMAP

443

HTTPS

3306

MySQL

5432

PostgreSQL

8080

HTTP Proxy

Our Open Port Checker tool allows you to quickly verify if a specific TCP port is open or closed on any remote host. This is useful for network diagnostics, security auditing, and troubleshooting server connectivity issues.

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Open Port Checker

Open Port Checker

DNS Propagation Check

Domain DNS

User Agent Finder

WebRTC Leak Test

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Subdomain Finder

IP Blacklist Check

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Contact

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