MAC Vendor Lookup

Identify vendors by IEEE prefix and inspect local/universal and unicast/multicast bits.

MAC address

Vendor

E-S-Tel

MA-SGlobal / vendor-assignedunicastuniversal

Global / vendor-assigned

Universal unicast MAC. In general this is a manufacturer-assigned address and the IEEE prefix tends to represent the NIC or hardware origin.

MAC: 8C:1F:64:AF:12:34
Hyphen: 8C-1F-64-AF-12-34
Cisco: 8C1F.64AF.1234
OUI: 8C1F64
Classification: Global / vendor-assigned
Registry: MA-S
Prefix: 8C1F64AF1

Local IEEE dataset: 52743 prefixes, generated on 2026-05-05.

Lookup and analysis run in your browser with a local dataset. The MAC address never leaves the page.

Details below

About this tool

Local IEEE lookup with structural analysis.

The tool normalizes 48-bit MAC addresses, searches the longest available IEEE prefix (MA-S, MA-M or MA-L/OUI) and shows whether the address is local, universal, unicast, multicast, broadcast or zero.

How to use

Paste a MAC in any common format.

Enter colon, hyphen, Cisco or plain 12-hex format.
Check vendor, registry and normalized formats.
Use local/universal and unicast/multicast flags to understand randomized or special addresses.

FAQ

Frequently asked questions

Does every MAC have a vendor?

No. Locally administered or randomized addresses may not match a public IEEE prefix.

Is the dataset complete?

Does randomized MAC reveal vendor?

Is my MAC sent anywhere?

Network

E-S-Tel

Local IEEE lookup with structural analysis.

Paste a MAC in any common format.

Frequently asked questions

Related tools

Privacy and ads

E-S-Tel