Which company owns MAC address prefix 54:DF:63?

MAC address prefix 54:DF:63 is registered to Intrakey technologies GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 54:DF:63 has a network interface built by Intrakey technologies GmbH.

What is the OUI 54:DF:63?

54:DF:63 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Intrakey technologies GmbH. It covers every address from 54:DF:63:00:00:00 to 54:DF:63:FF:FF:FF, or 16,777,216 addresses in total. It is also written 54-DF-63.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 54:DF:63:00:00:00 that is 54:DF:63 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.

Where is Intrakey technologies GmbH located?

Intrakey technologies GmbH is listed at Wiener Strasse 114-116 Dresden Saxony DE 01219 in the IEEE OUI registry entry for 54:DF:63. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Intrakey technologies GmbH

MAC address prefix 54:DF:63 is registered to Intrakey technologies GmbH in the IEEE OUI registry. Any device whose MAC address begins with 54:DF:63 has a network interface built by Intrakey technologies GmbH. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address — it covers every MAC from 54:DF:63:00:00:00 to 54:DF:63:FF:FF:FF.

OUI prefix: 54:DF:63
Hyphen form: 54-DF-63
MAC range: 54:DF:63:00:00:00 – 54:DF:63:FF:FF:FF
Addresses in block: 16,777,216
Organization: Intrakey technologies GmbH
Address: Wiener Strasse 114-116 Dresden Saxony DE 01219
Source: IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2016-07-29Assigned to "Intrakey technologies GmbH"
archived source →
2026-07-17Assigned to "Intrakey technologies GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 54:DF:63:

FAQ

Which company owns MAC address prefix 54:DF:63?: MAC address prefix 54:DF:63 is registered to Intrakey technologies GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 54:DF:63 has a network interface built by Intrakey technologies GmbH.
What is the OUI 54:DF:63?: 54:DF:63 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Intrakey technologies GmbH. It covers every address from 54:DF:63:00:00:00 to 54:DF:63:FF:FF:FF, or 16,777,216 addresses in total. It is also written 54-DF-63.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 54:DF:63:00:00:00 that is 54:DF:63 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.
Where is Intrakey technologies GmbH located?: Intrakey technologies GmbH is listed at Wiener Strasse 114-116 Dresden Saxony DE 01219 in the IEEE OUI registry entry for 54:DF:63. This is the address the organization registered with the IEEE, which may differ from its current operating address.