Common Ports Lookup

📖 Tool Introduction

When you do operations, troubleshoot a firewall, write a security script or memorise network protocols, a single port number often stops you cold: is 3306 MySQL? Is 6379 Redis or something else? Which of 465 and 587 is the modern message submission port? These numbers follow no obvious pattern, and flipping through RFCs or Wikipedia entries is too slow. The Common Ports Lookup fixes forty-six of the most frequent TCP/UDP ports right inside the page, organised into six categories: web, remote login, mail, file sharing, databases and infrastructure. You can open it and start reading immediately. Type a port number such as 443 in the search box to jump straight to HTTPS, or type a service name such as mysql to reverse-find 3306; you may also click category pills to filter by purpose. Every row lists the port number, the transport protocol (TCP, UDP or both), the service name and a one-line description, and clicking any row copies it as a single plain-text line that you can paste into firewall rules, configuration docs or troubleshooting notes. The whole table is embedded locally in the browser, so no external port database lookup is needed and the page opens instantly even on an internal network.

✨ Key Features

• Forty-six curated ports: covers 20/21 FTP, 22 SSH, 25 SMTP, 53 DNS, 80/443 web, 3306 MySQL, 6379 Redis, 27017 MongoDB and other high-frequency ports
• Bidirectional search: locate a service by number, or reverse-find a number by service name
• Six categories: All, Web, Remote, Mail, File, Database and Infrastructure pills for one-click filtering
• Protocol badges: TCP, UDP and both are colour-coded so the transport type is obvious at a glance
• Row-click copy: any row copies as a single line such as port/proto service - description
• Fully offline: the table is embedded in JavaScript; no external request is ever made

📝 How to Use

1. Open the page and all forty-six port entries are already listed
2. Type a port number (such as 443) or a service name (such as ssh) and the table filters instantly
3. Click a category pill to narrow results to web, remote, mail and so on
4. Click any table row to copy that port entry as text
5. Use Copy result to copy all currently filtered rows, or Download to save them as a text file

⚠️ Notes

• Common, not exhaustive: the table covers the forty-six most frequent ports for ops and dev; it is not the full IANA registry
• Defaults may vary: a service may run on a different port depending on configuration; the table lists the industry defaults
• Fuzzy search: partial keywords match, but a port number must be exact digits
• Categories are hints: the same service may belong to different categories in different contexts; pills are just filters
• Reference only: the tool does not scan your network or test whether a port is open; it is a static reference
• Pinned tab: keep the page open in a pinned tab while reading firewall logs, because the table renders in milliseconds and requires no network round trip
• Static snapshot: entries reflect the defaults documented by IANA and common vendor practice at the time of writing; unusual or proprietary services may use non-standard ports not listed here