Which company owns MAC address prefix 88:23:FE?

MAC address prefix 88:23:FE is registered to TTTech Computertechnik AG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 88:23:FE has a network interface built by TTTech Computertechnik AG.

What is the OUI 88:23:FE?

88:23:FE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TTTech Computertechnik AG. It covers every address from 88:23:FE:00:00:00 to 88:23:FE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 88-23-FE.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 88:23:FE:00:00:00 that is 88:23:FE — 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 TTTech Computertechnik AG located?

TTTech Computertechnik AG is listed at Schoenbrunnerstrasse 7 Vienna AT 1040 in the IEEE OUI registry entry for 88:23:FE. This is the address the organization registered with the IEEE, which may differ from its current operating address.

TTTech Computertechnik AG

MAC address prefix 88:23:FE is registered to TTTech Computertechnik AG in the IEEE OUI registry. Any device whose MAC address begins with 88:23:FE has a network interface built by TTTech Computertechnik AG. 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 88:23:FE:00:00:00 to 88:23:FE:FF:FF:FF.

OUI prefix: 88:23:FE
Hyphen form: 88-23-FE
MAC range: 88:23:FE:00:00:00 – 88:23:FE:FF:FF:FF
Addresses in block: 16,777,216
Organization: TTTech Computertechnik AG
Address: Schoenbrunnerstrasse 7 Vienna AT 1040
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 "TTTech Computertechnik AG"
archived source →
2026-07-17Assigned to "TTTech Computertechnik AG"

Nearby in the registry

The prefixes assigned immediately before and after 88:23:FE:

FAQ

Which company owns MAC address prefix 88:23:FE?: MAC address prefix 88:23:FE is registered to TTTech Computertechnik AG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 88:23:FE has a network interface built by TTTech Computertechnik AG.
What is the OUI 88:23:FE?: 88:23:FE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to TTTech Computertechnik AG. It covers every address from 88:23:FE:00:00:00 to 88:23:FE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 88-23-FE.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 88:23:FE:00:00:00 that is 88:23:FE — 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 TTTech Computertechnik AG located?: TTTech Computertechnik AG is listed at Schoenbrunnerstrasse 7 Vienna AT 1040 in the IEEE OUI registry entry for 88:23:FE. This is the address the organization registered with the IEEE, which may differ from its current operating address.