Port Number Lookup Tool | Network Port Identifier

Networking can feel like a maze of numbers and protocols. Every application you use online — from web browsing to email to gaming — runs through a port number. These ports act like “doors” that allow data to enter and leave your device. But remembering which port belongs to which service (HTTP, HTTPS, FTP, SSH, etc.) isn’t always easy. That’s why a Port Number Lookup Tool is handy.

With this tool, you can enter either a port number (e.g., 80, 443, 22) or a service name (e.g., HTTP, DNS, SSH) and instantly see what it’s used for.

Why This Tool is Important

• Quick Identification: No need to search through long IANA tables or manuals.
  
• Troubleshooting Made Simple: When a firewall blocks traffic, knowing the correct port helps you fix it fast.
  
• Learning Aid: Great for IT students or network engineers brushing up on port knowledge.
  
• Security Awareness: Helps spot unusual traffic — if a strange port is in use, it might be suspicious.
  

Key Parameters

• Port Number: A number between 0 and 65535 assigned to network services. Example: 80 (HTTP), 25 (SMTP).
  
• Service Name: The human-readable protocol name linked to a port. Example: SSH → Port 22.
  

Ports are divided into categories:

• Well-Known Ports (0–1023): Reserved for common protocols (HTTP, DNS, FTP).
  
• Registered Ports (1024–49151): Used by software vendors (Databases, custom services).
  
• Dynamic/Private Ports (49152–65535): Temporary connections (like your browser talking to a website).
  

How the Calculator Works

1. Enter a Port Number (e.g., 443).
   
   • The tool checks the official IANA database or a local mapping.
     
   • Output: HTTPS – Secure web traffic.
     
2. Or Enter a Service Name (e.g., DNS).
   
   • The tool looks up the associated port.
     
   • Output: Port 53 – Domain Name System queries.
     
3. Results Include:
   
   • Port Number
     
   • Service/Protocol Name
     
   • Typical Use Case (web, email, file transfer, etc.)
     

Common Formulas or Logic

While this isn’t a mathematical calculator, it relies on protocol-to-port mappings:

• HTTP → 80
  
• HTTPS → 443
  
• FTP → 21
  
• SSH → 22
  
• DNS → 53
  
• SMTP → 25
  
• POP3 → 110
  
• IMAP → 143
  

Behind the scenes, the tool just matches inputs to these standard definitions.