Port Number Checker
Enter a port — see the common service and its IANA range
Port number
Port Number Checker — Complete Guide & Instructions
MakeCard Port Number Checker is a quick reference for TCP/UDP port numbers. Type any port from 0 to 65535 and it tells you which well-known service typically uses it — from SSH on 22 and HTTPS on 443 to MySQL on 3306 and MongoDB on 27017 — plus which IANA range it falls in (well-known, registered, or dynamic/private). It is a handy lookup for developers, sysadmins, and anyone reading firewall rules or config files.
How to Use Port Number Checker
- 1 Type a port number (e.g. 443, 3306, 8080) in the Port number box.
- 2 Press “Check port” or hit Enter.
- 3 The result shows the port, the common service name, and its IANA range.
- 4 Ports with no standard service are labeled as such.
- 5 Press “Sample” to try a lookup instantly.
Key Features & Capabilities
- Covers every valid port 0–65535 with range classification.
- Built-in reference of ~65 commonly used ports — web, mail, databases, dev tools, games, VPN.
- IANA range labels: well-known (0–1023), registered (1024–49151), dynamic/private (49152–65535).
- Instant answers — the whole database runs in your browser.
- Honest “No common service” response for unassigned ports.
Supported Formats & Specifications
| Parameter | Specification |
|---|---|
| Port Range | 0–65535 (valid TCP/UDP range) |
| Reference List | ~65 well-known services — HTTP(S), SSH, SMTP, databases, dev servers, games |
| IANA Ranges | Well-known 0–1023 · Registered 1024–49151 · Dynamic 49152–65535 |
| Lookup | Instant, client-side reference |
| Input | Numeric port number only |
Practical Everyday Use Cases
- Identifying what service is listening when netstat shows an unfamiliar port.
- Checking a port before writing a firewall or security-group rule.
- Looking up the default port when configuring a database or mail client.
- Learning common port numbers for networking exams or interviews.
- Choosing a non-conflicting port for a new development server.
Pro Tips for Best Results
- Ports below 1024 usually need admin/root privileges to bind — that's why dev servers pick 3000 or 8080.
- A port's “common” service is a convention, not a rule — apps can be configured onto any port.
- The 49152–65535 dynamic range is where OSes assign ephemeral client-side ports.
- Bookmark it next to the Port Checker tool — one tells you the service, the other whether it's reachable.
Common Problems & Solutions
The reference covers ~65 popular ports — a port can still be legitimately used by software not in the list.
Enter digits only, between 0 and 65535 — letters, ranges like 80-90, or negatives are rejected.
Several ports serve multiple purposes (e.g. 8080 for proxies and alt-HTTP) — the listed name is the most common association.
Privacy & Security
100% Client-Side Execution
The port reference is built into the page — lookups happen entirely in your browser with nothing sent to a server.
Frequently Asked Questions
Everything you need to know about using Port Number Checker
Well-known ports (0–1023) are assigned to core services like HTTP and SSH; registered ports (1024–49151) are allocated to specific applications; 49152–65535 are dynamic/ephemeral.
MySQL (and MariaDB) — one of the ~65 services in the built-in reference.
Not simultaneously on the same interface — but TCP and UDP are separate namespaces, so port 53 TCP and port 53 UDP can coexist.
8080 is the conventional HTTP alternate — used when 80 needs admin rights or is already taken.
No — it is a static reference lookup, not a scan. Use the Port Checker tool to test whether a port is actually open.
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