MAC Address Vendor Lookup (OUI Search) | iN2 Tools

Look up Organizationally Unique Identifiers (OUIs) against a local vendor database or remote API.

MAC Address OUI Vendor Lookup

Resolve Organizationally Unique Identifiers (OUI) from MAC addresses. Identify hardware manufacturers (Cisco, Apple, Intel, Dell, Raspberry Pi) against IEEE registration databases.

Understanding MAC Address OUI Registries

A Media Access Control (MAC) address is a unique 48-bit (6-octet) identifier assigned to Network Interface Cards (NICs) at Layer 2 of the OSI model. The first 3 octets (24 bits) form the Organizationally Unique Identifier (OUI) registered with IEEE.

Common MAC Address Notation Formats

  • Colon-Separated: 00:1A:2B:3C:4D:5E (Standard Unix / Linux notation).
  • Hyphen-Separated: 00-1A-2B-3C-4D-5E (Standard Windows notation).
  • Cisco Dot-Separated: 001a.2b3c.4d5e (Cisco IOS switch port notation).

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