Question 1

What is a MAC address lookup?

Accepted Answer

A MAC address lookup identifies the manufacturer of a network device using its OUI (Organizationally Unique Identifier). The first 3 bytes of any MAC address are registered to a company in the IEEE database. Enter any MAC address to find the vendor instantly.

Question 2

What MAC address formats are supported?

Accepted Answer

All formats are accepted: colon-separated (4C:B0:4A:5E:0B:C3), hyphen-separated (4C-B0-4A-5E-0B-C3), plain hex (4CB04A5E0BC3), Cisco dot notation (4CB0.4A5E.0BC3), and partial OUI prefixes (4C:B0:4A).

Question 3

Can I search by vendor or company name?

Accepted Answer

Yes. Type a company name such as Cisco, Apple, Samsung or Raspberry Pi into the search box to find all MAC prefixes registered to that organisation in the IEEE OUI database.

Question 4

How accurate is the data?

Accepted Answer

All data is sourced directly from the official IEEE Standards OUI Registry. The database is refreshed daily to capture new vendor registrations and updates.

Question 5

What are MA-L, MA-M, MA-S, CID and IAB?

Accepted Answer

These are IEEE MAC address block types. MA-L (Large) is the classic 24-bit OUI for large manufacturers like Cisco and Apple. MA-M (Medium) uses 28-bit prefixes. MA-S (Small) uses 36-bit prefixes for small vendors and IoT devices. CID is for non-Ethernet protocol contexts. IAB is a legacy type replaced by MA-S in 2014.

Contact Us

Email

Follow Us