MAC Address Lookup & OUI Vendor Identification Tool

MAC Address Lookup Tool

Identify hardware vendors, OUI prefixes, and format network adapter MAC addresses instantly in your browser.

MAC Analysis & Vendor Details

Valid MAC Address
Normalized MAC:
00:1A:2B:3C:4D:5E
OUI Vendor Prefix:
00-1A-2B
Hardware Vendor:
Cisco Systems, Inc / Enterprise Network Hardware
Address Type:
Unicast / Universally Administered
Hyphen Format:
00-1A-2B-3C-4D-5E
Cisco Format:
001a.2b3c.4d5e

Understanding MAC Addresses & OUI Prefixes

A Media Access Control (MAC) address is a unique hardware identifier assigned to network interfaces for communications on physical network segments. The first 3 octets form the Organizationally Unique Identifier (OUI).

Lookup Guidelines

  • Vendor Identification: Use the OUI prefix to trace hardware manufacturers when auditing local area network devices or configuring DHCP reservations.
  • Format Compatibility: Network gear often requires specific delimiter notations such as colon-separated, hyphenated pairs, or Cisco dot-notation.

Privacy & Security Note

All MAC address lookup and normalization routines execute entirely client-side within your browser environment. Your hardware queries and network device audits are never transmitted or stored externally.