IT reference · Network administration
Port Finder
Search common application defaults first, followed by registered network services. Browse by port, protocol, service or application.
1,000 unique port numbersCurated common defaults first · IANA registered servicesSearch by port, service or application
| Rank | Port | Protocol | Service / assignment | Common application / use | Category | Details & security | Copy |
|---|---|---|---|---|---|---|---|
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Important: A port number alone does not identify a process with certainty. Applications can change ports, share ports or use dynamic ports. Node.js commonly uses port 3000 by convention (Grafana also commonly uses 3000), while RDP commonly uses TCP and UDP 3389. Verify the actual listener on the host.
Security: Do not expose administrative, database, file-sharing, container API or remote-access services directly to the public Internet. Use firewalls, VPNs, strong authentication and current vendor guidance.
Methodology: this is a curated 1,000-entry reference. Common application defaults are surfaced first; the remaining entries are IANA-registered or documented service assignments. The order is curated for practical usefulness, not a measured internet scan ranking. Official IANA assignments and community application conventions are identified separately. Consult the IANA registry for authoritative assignments. Supplemental port descriptions are sourced from a public-domain port reference (Unlicense); application defaults are separately curated and linked to vendor documentation where available.