Port Number Lookup (Common Ports)
What runs on port 22, 443, 3389…? Search common TCP/UDP port numbers and services.
Tool inputs stay in your browser · optional AI search sends your query
Good to know: A port is like a door number on a computer: the IP finds the building, the port finds the right service inside.
How to use it (step by step)
- 1Fill in the boxes: “Port number or service name”. Example numbers are already there so you can see how it works; replace them with yours.
- 2The result updates instantly as you type (on a phone it is below the boxes).
- 3The bold line is the main answer. Tap Copy next to any value to copy it.
Words to know
- Port
- A numbered door on a computer. The IP finds the device; the port finds the service (443 = secure websites, 22 = SSH).
- IP address
- The address of a device on the internet, like a house number for your connection. Websites need it to send pages back to you.
- Array / list
- An ordered collection of items, like ["apple", "banana"]. Every programming language has one.
More in Network & Internet
User Agent ParserPaste a user agent string to see the browser, version, operating system, device and engine.Punycode Converter (IDN Domains)Convert international domain names like café.com to xn-- form and back.Bandwidth Calculator (Streaming & Website)How much internet speed a live stream needs, or how much data a website uses per month.What Is My IP Address?See your public IPv4 and IPv6 address, country and internet provider instantly.IP Address Lookup (Owner & Location)Find who owns any IP address or website, its country, range, hostname and abuse contact.DNS Lookup (A, MX, TXT, CNAME…)Check any domain’s DNS records and compare Cloudflare vs Google to see if changes have spread.