53
DNS
Domain Name System
UDP/TCP
Network
Port Information
Port Number
53
Protocol
UDP/TCP
Category
Network
Common Usage
URL with Port
http://localhost:53 https://example.com:53
Node.js/Express Server
const express = require('express');
const app = express();
const PORT = 53;
app.listen(PORT, () => {
console.log(`Server running on port ${PORT}`);
});Docker Port Mapping
docker run -p 53:53 myapp # In docker-compose.yml ports: - "53:53"
Firewall Configuration
# Linux/Ubuntu firewall sudo ufw allow 53/udp/tcp # Check if port is in use netstat -an | grep 53
Port 53 - DNS
Domain Name System This is a UDP/TCP port commonly used in network applications. Port numbers range from 0-65535, with ports 0-1023 being well-known system ports, 1024-49151 being registered ports, and 49152-65535 being dynamic/private ports.