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🔌 TCP / UDP Port Reference
You see a connection to port 5060 and wonder what it is. This is the reference. Search by number or service name. Covers the well-known ports (0-1023), registered ports (1024-49151), and commonly used app ports you actually see in firewall logs.
Examples
80 (HTTP, TCP) · 443 (HTTPS, TCP) · 8080 (HTTP alternate)25 (SMTP) · 587 (SMTP submission) · 993 (IMAPS) · 995 (POP3S)5432 (PostgreSQL) · 3306 (MySQL) · 6379 (Redis) · 27017 (MongoDB)Frequently asked questions
Why do databases have non-standard ports?
Historical accident — early designers picked them, and now changing them would break compatibility everywhere. There is no logic beyond "it was free at the time."
Why is HTTPS on 443?
Netscape picked it in 1994 when they invented HTTPS. It was unallocated then. The number itself means nothing.
About this calculator
TCP / UDP Port Reference runs entirely in your browser using standard formulas. No data is sent to any server. We don't share your inputs with lenders, brokers, or anyone else — there's no funnel and no follow-up email.
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Why this tool
vs typical free network-tools sites
| NetToolset | Typical free site | |
|---|---|---|
| Price | Free | Free |
| Signup required | No | Often (for advanced features) |
| Ads inside the tool | No | Yes (banner + interstitial) |
| Logs your IP / queries | No | Yes (often resold) |
| Data sent to a server | Math runs in browser; lookups hit Cloudflare DoH directly | Yes (all goes through their server) |
| Open source | Yes | No |
| Bookmarkable URL per tool | Yes | Mixed |
| Multilingual | EN / ES / PT / FR / DE | Usually EN only |
| Loads in under 1s | Yes (static) | Often slow (ad tracking) |