MAC Lookup identifies the manufacturer and vendor associated with any MAC address by looking up the OUI (Organizationally Unique Identifier). Supports common MAC address formats — colons (AA:BB:CC:DD:EE:FF), dashes (AA-BB-CC-DD-EE-FF), or no separators. The tool queries the IEEE OUI database and additional vendor lookup APIs to provide accurate manufacturer identification. Useful for network forensics, device identification, and asset management investigations.
ouimanufacturerieeenetwork
Last updated:
Features
IEEE OUI database lookup
Multiple MAC format support
Manufacturer identification
Vendor name resolution
Format normalization
Multiple API source queries
Copy-friendly results
HTML session export
Fast lookup performance
No API key required
Quick Start
# 1. Extract the zip and enter the folder cd 10-MAC-Lookup
MAC addresses are 48-bit hardware identifiers standardized by IEEE 802. The first 24 bits form the OUI, registered with the IEEE Registration Authority (over 47,000 manufacturer registrations). This tool performs OUI lookups against the IEEE database to identify any network device's hardware manufacturer.
Network Security Applications
MAC address analysis is standard in digital forensics per the SANS DFIR methodology. According to NIST SP 800-94 (Guide to Intrusion Detection and Prevention Systems), MAC address monitoring is recommended for detecting unauthorized network access. Network administrators use OUI lookups to identify unknown devices, security professionals detect rogue access points, and forensic investigators trace device activity.
MAC Randomization Challenges
Modern OSes use randomized MACs for Wi-Fi scanning — Apple, Google, and Microsoft implemented this since 2014-2020. According to a 2023 IEEE study, randomized MACs account for over 70% of probe requests on public networks. This tool helps distinguish randomized addresses (locally administered bit set) from genuine manufacturer-assigned addresses.
🔧 MAC Lookup — Frequently Asked Questions
What is a MAC address OUI?
The OUI (Organizationally Unique Identifier) is the first 24 bits of a MAC address, assigned by IEEE to hardware manufacturers. Looking up the OUI reveals the device vendor, which helps identify device types on a network.
Does the MAC address lookup tool require installation?
No. The tool runs entirely in your browser using client-side Python via Pyodide. No installation, API keys, or server-side processing required. Your queries are executed locally for maximum privacy.
What can I do with the MAC address lookup tool?
You can identify device manufacturers, detect randomized MACs, and parse OUI databases. The tool provides a clean interface with exportable results and cross-links to related Max Intel tools for deeper investigation.