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MAC Address Tools

Validate and reformat MAC addresses, and look up the OUI vendor prefix.

Works Offline
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No Login
No API

MAC address

Enter in any common notation

Formatted variants

Common separator styles

Colon
00:1B:63:84:45:E6
Dash
00-1B-63-84-45-E6
Dot (Cisco)
001B.6384.45E6

OUI & vendor

Organizationally Unique Identifier lookup

OUI prefix
00:1B:63
Vendor
Apple
Multicast bit
No
Locally administered
No
OUI bytes
001B63

Vendor lookup uses a small built-in table of common prefixes and is not a full IEEE OUI database.

About the MAC Address Tools

Enter a MAC address in any common notation to validate it and see it reformatted with colons, dashes, or Cisco-style dots. Also shows the OUI (vendor prefix) bytes and a best-effort vendor name lookup.

Examples

Format MAC

001b6384 45e6

Output

00:1B:63:84:45:E6

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser