Common Ports Lookup — Free Online Tool
Search common TCP/UDP ports and the services that use them.
| Port | Protocol | Service | Description |
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About Common Ports Lookup
The Common Ports Lookup is a fast, searchable reference of the TCP and UDP port numbers you reach for most often — web, mail, remote access, file transfer, DNS, databases, and more. Search by number or by service name to find what you need instantly.
It's handy when writing firewall rules, troubleshooting connectivity, or studying for networking exams. The list is bundled with the page and filtered in your browser, so it's instant and private.
How to Use Common Ports Lookup
- Type a port number or service name in the search box.
- The table filters to matching ports as you type.
- Read the protocol and description for each match.
- Clear the box to see the full list again.
Key Features
Curated list of common TCP/UDP ports
Instant search by number or service name
Protocol and description for each port
Great for firewalls, troubleshooting, and study
100% client-side and private
Frequently Asked Questions
How do I use the ports lookup?
Type a port number (like 443) or a service name (like ssh) in the search box and the table filters instantly to matching entries.
What are well-known ports?
Ports 0–1023 are 'well-known' ports assigned by IANA to common services such as HTTP (80), HTTPS (443), and SSH (22). Ports 1024–49151 are registered ports.
Is this a full port database?
It's a curated list of the most common and useful ports. It covers the services most people look up; it is not the complete IANA registry.
Is anything sent to a server?
No. The list ships with the page and is searched in your browser, so nothing is uploaded.