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Developer tools·Networking

Port Number Reference

Look up IANA TCP and UDP port numbers by service name or number. See protocol support, official status, and descriptions for SSH, HTTPS, DNS, and more.

Added Jun 1, 2026

Quick examples

Input

Result

Enter a value for port number or service name to see your result.

How it works

Search IANA well-known and commonly registered TCP/UDP ports by number or service name. Shows protocol support, official vs unofficial status, and a one-line description for each match.

Step by step

  1. 01Enter a port number (e.g. 443) or service keyword (e.g. https, ssh).
  2. 02Matching entries appear in the table with TCP/UDP support and status.
  3. 03Use results for firewall rules, security audits, and troubleshooting.

Examples

Lookup HTTPS port

Port 443 is the standard HTTPS port (TCP and UDP per IANA).

Inputs

Port number or service name:
443

Result

Matches:
1

Search by service name

Finds port 22 — Secure Shell.

Inputs

Port number or service name:
ssh

Result

Matches:
1
Note: Bundled registry covers well-known and common registered ports; dynamic/private ports (49152–65535) are not listed. Unofficial entries are widely used but not assigned by IANA (e.g. Redis 6379).

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Frequently asked questions

What are well-known ports?

Ports 0–1023 are the well-known range, assigned by IANA for standard services like HTTP (80), HTTPS (443), and DNS (53). They typically require root/admin privileges to bind on Unix systems.

What is the difference between official and unofficial ports?

Official ports are registered with IANA and listed in the service name registry. Unofficial ports are conventions adopted by software (e.g. Redis on 6379) without formal IANA assignment.