🌐Port Checker

External Port Discovery
Detected Open Ports: None

Common Ports

21 FTP
22 SSH
23 TELNET
25 SMTP
53 DNS
80 HTTP
110 POP3
115 SFTP
135 RPC
139 NetBIOS
143 IMAP
194 IRC
443 SSL
445 SMB
1433 MSSQL
3306 MySQL
3389 RDP
5632 PCA
5900 VNC
25565 Minecraft
Digital Handshake Diagnostics The open port checker is a tool you can use to check your external IP address and detect open ports on your connection. This tool is useful for finding out if your port forwarding is setup correctly or if your server applications are being blocked by a firewall. This tool may also be used as a port scanner to scan your network for ports that are commonly forwarded. It is important to note that some ports, such as port 25, are often blocked at the ISP level in an attempt to prevent malicious activity.
What is Port Checker? Port Checker is a free online tool that helps determine whether a specific TCP port on your computer, router, or server is open and reachable from the Internet. It is commonly used to verify port forwarding, troubleshoot firewalls, and ensure network services are publicly accessible.
Why Use Port Checker?
  • Verify router port forwarding
  • Test firewall configuration
  • Troubleshoot application connectivity
  • Check if a game server is reachable
  • Confirm remote service availability
Port Number Ranges
RangeDescription
0 - 1023Well Known Ports (HTTP, SSH, FTP, DNS, etc.)
1024 - 49151Registered Ports (assigned to specific applications)
49152 - 65535Dynamic / Private Ports (ephemeral, client-side use)
Understanding Port Forwarding Port forwarding allows incoming Internet traffic to reach a specific device inside your private network. It is commonly required for hosting websites, SSH servers, remote desktop services, CCTV systems, and multiplayer game servers.
Frequently Asked Questions

What is an open port?

An open port is a network port that accepts incoming connections from other devices.

Is Port Checker safe?

Yes. The tool only attempts to establish a connection to the specified port and does not access your files or data.

Why is my port closed?

The service may not be running, your firewall may be blocking it, your router's port forwarding may be incorrect, or your ISP may restrict the port.

Can I check remote servers?

Yes. Enter a public IP address or hostname along with the port number to test external accessibility.

Traceroute

Ready
Trace The Network Path To Any Host
Try:

About Traceroute

Traceroute is a network diagnostic tool that shows the path packets take to reach a destination. Each hop represents a router or network device along the way, and response times reveal latency at each point in the path.

Understanding Results

Green response times (under 50ms) indicate fast connections.

Yellow times (50–150ms) are moderate.

Red times (over 150ms) may indicate congestion or long distances.

Route Map

Interactive
Live Geolocated Hop Path
Hops
Origin / Fast (<50ms)
Moderate (50–150ms)
Slow (>150ms)
Route
Packet path

MTR

Ready
Combined Ping + Traceroute With Rolling Loss & Latency Stats
Try:

About MTR

MTR combines traceroute and ping into one continuous test. Instead of a single probe per hop, it sends several packets to every hop and reports packet loss and latency statistics for each one — much better for spotting an intermittently flaky hop that a single traceroute would miss.

Subnet / CIDR Calculator

Network, Broadcast & Host Range Lookup
IP Address with CIDR

Password Generator

Cryptographically Random Passwords
Password Length: 16
How Many:

What's My IP

Your Public-Facing Address

Your current public IP address, as seen by this server's visitors.

Bandwidth Calculator

Transfer Time & Throughput Converter

Work out how long a transfer will really take at a given link speed — handy for capacity planning and setting realistic expectations on circuit upgrades.

File / Transfer Size
Link Speed
Source Destination