Which company owns MAC address prefix 88:B1:68?

MAC address prefix 88:B1:68 is registered to Delta Control GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 88:B1:68 has a network interface built by Delta Control GmbH.

What is the OUI 88:B1:68?

88:B1:68 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Delta Control GmbH. It covers every address from 88:B1:68:00:00:00 to 88:B1:68:FF:FF:FF, or 16,777,216 addresses in total. It is also written 88-B1-68.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 88:B1:68:00:00:00 that is 88:B1:68 — 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 Delta Control GmbH located?

Delta Control GmbH is listed at Rondorfer Hauptstraße 33 Cologne NRW DE 50997 in the IEEE OUI registry entry for 88:B1:68. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Delta Control GmbH

MAC address prefix 88:B1:68 is registered to Delta Control GmbH in the IEEE OUI registry. Any device whose MAC address begins with 88:B1:68 has a network interface built by Delta Control 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 88:B1:68:00:00:00 to 88:B1:68:FF:FF:FF.

OUI prefix: 88:B1:68
Hyphen form: 88-B1-68
MAC range: 88:B1:68:00:00:00 – 88:B1:68:FF:FF:FF
Addresses in block: 16,777,216
Organization: Delta Control GmbH
Address: Rondorfer Hauptstraße 33 Cologne NRW DE 50997
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 "Delta Control GmbH"
archived source →
2026-07-17Assigned to "Delta Control GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 88:B1:68:

FAQ

Which company owns MAC address prefix 88:B1:68?: MAC address prefix 88:B1:68 is registered to Delta Control GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 88:B1:68 has a network interface built by Delta Control GmbH.
What is the OUI 88:B1:68?: 88:B1:68 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Delta Control GmbH. It covers every address from 88:B1:68:00:00:00 to 88:B1:68:FF:FF:FF, or 16,777,216 addresses in total. It is also written 88-B1-68.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 88:B1:68:00:00:00 that is 88:B1:68 — 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 Delta Control GmbH located?: Delta Control GmbH is listed at Rondorfer Hauptstraße 33 Cologne NRW DE 50997 in the IEEE OUI registry entry for 88:B1:68. This is the address the organization registered with the IEEE, which may differ from its current operating address.