MAC Address Lookup

A fast and lightweight Node.js library for MAC address vendor lookup using the IEEE OUI database.

Features

• 🚀 Fast Query - Memory-based lookup with millisecond response time
• 📦 Lightweight - Zero dependencies (except oui-data package)
• 🔄 Multiple Format Support - Supports various MAC address formats
• 📊 Complete Information - Provides vendor name, address and other details
• ✅ TypeScript - Type definitions support (planned)
• 🌐 Offline Support - Works without internet connection

Installation

npm install mac-address-lookup

Quick Start

const macLookup = require('mac-address-lookup');

// Basic lookup
const result = macLookup.lookup('10:00:20:11:3A:B7');
console.log(result.vendor); // "Apple, Inc."

// Simple vendor lookup
const vendor = macLookup.getVendor('10:00:20:11:3A:B7');
console.log(vendor); // "Apple, Inc."

API Documentation

lookup(mac)

Query detailed vendor information for a MAC address.

Parameters:

• mac (string): MAC address in various formats

Returns:

• Success: Object containing vendor information
• Not found: null

Example:

const result = macLookup.lookup('10:00:20:11:3A:B7');
// {
//   oui: '100020',
//   vendor: 'Apple, Inc.',
//   address: '1 Infinite Loop\nCupertino CA 95014\nUnited States',
//   raw: 'Apple, Inc.\n1 Infinite Loop\nCupertino CA 95014\nUnited States'
// }

getVendor(mac)

Get the vendor name of a MAC address (simplified version).

Parameters:

• mac (string): MAC address

Returns:

• Success: Vendor name string
• Not found: null

Example:

const vendor = macLookup.getVendor('00:50:56:AA:BB:CC');
console.log(vendor); // "VMware, Inc."

isValid(mac)

Validate MAC address format.

Parameters:

• mac (string): MAC address to validate

Returns:

• boolean: Whether the format is valid

Example:

console.log(macLookup.isValid('10:00:20:11:3A:B7')); // true
console.log(macLookup.isValid('invalid')); // false

format(mac, separator)

Format a MAC address.

Parameters:

• mac (string): MAC address
• separator (string, optional): Separator character, defaults to :

Returns:

• string: Formatted MAC address

Example:

console.log(macLookup.format('001b44113ab7')); // "00:1B:44:11:3A:B7"
console.log(macLookup.format('001b44113ab7', '-')); // "00-1B-44-11-3A-B7"

stats()

Get database statistics.

Returns:

• object: Object containing statistics

Example:

const stats = macLookup.stats();
// {
//   totalOUIs: 37496,
//   uniqueVendors: 25637,
//   lastUpdated: "^1.1.362"
// }

Supported MAC Address Formats

The library supports the following MAC address formats:

• 00:1B:44:11:3A:B7 (colon-separated)
• 00-1B-44-11-3A-B7 (hyphen-separated)
• 001B44113AB7 (no separators)
• 001b44113ab7 (lowercase)

Usage Examples

Batch Lookup

const macs = [
  '10:00:20:11:3A:B7',  // Apple
  '08:00:27:12:34:56',  // Oracle (VirtualBox)
  '00:50:56:AA:BB:CC',  // VMware
];

macs.forEach(mac => {
  const vendor = macLookup.getVendor(mac);
  console.log(`${mac} -> ${vendor || 'Unknown vendor'}`);
});

Error Handling

try {
  const result = macLookup.lookup('invalid-mac');
} catch (error) {
  console.error('Lookup failed:', error.message);
}

Integration with Other Libraries

const macLookup = require('mac-address-lookup');

// Process network packets
function processPacket(packetData) {
  const srcMac = packetData.sourceMac;
  const vendor = macLookup.getVendor(srcMac);
  
  return {
    ...packetData,
    sourceVendor: vendor
  };
}

Alias Functions

For convenience, the library also provides these aliases:

• find() - Alias for lookup()
• vendor() - Alias for getVendor()
• validate() - Alias for isValid()

Data Source

This library uses the oui-data package which provides the IEEE OUI database. The database is regularly updated to include the latest vendor registration information.

Performance

• Query time: < 1ms
• Memory usage: ~4MB (depending on database size)
• Database entries: 37,000+ OUI records

License

MIT License - see LICENSE file for details.

Contributing

Issues and Pull Requests are welcome!

1. Fork the project
2. Create a feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

Related Tools

• MAC Address Lookup - Online MAC address lookup tool

Changelog

1.0.0

• Initial release
• Basic MAC address lookup functionality
• Multiple MAC address format support
• Complete API interface