Which company owns MAC address prefix 64:B6:23?

MAC address prefix 64:B6:23 is registered to Schrack Seconet Care Communication GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 64:B6:23 has a network interface built by Schrack Seconet Care Communication GmbH.

What is the OUI 64:B6:23?

64:B6:23 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Schrack Seconet Care Communication GmbH. It covers every address from 64:B6:23:00:00:00 to 64:B6:23:FF:FF:FF, or 16,777,216 addresses in total. It is also written 64-B6-23.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 64:B6:23:00:00:00 that is 64:B6:23 — 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 Schrack Seconet Care Communication GmbH located?

Schrack Seconet Care Communication GmbH is listed at Eibesbrunnergasse 18 Vienna AT 1120 in the IEEE OUI registry entry for 64:B6:23. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Schrack Seconet Care Communication GmbH

MAC address prefix 64:B6:23 is registered to Schrack Seconet Care Communication GmbH in the IEEE OUI registry. Any device whose MAC address begins with 64:B6:23 has a network interface built by Schrack Seconet Care Communication 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 64:B6:23:00:00:00 to 64:B6:23:FF:FF:FF.

OUI prefix: 64:B6:23
Hyphen form: 64-B6-23
MAC range: 64:B6:23:00:00:00 – 64:B6:23:FF:FF:FF
Addresses in block: 16,777,216
Organization: Schrack Seconet Care Communication GmbH
Address: Eibesbrunnergasse 18 Vienna AT 1120
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 (3)

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

2020-08-05Assigned to "CCS Care Communication Solutions GmbH"
archived source →
2022-07-11Renamed from "CCS Care Communication Solutions GmbH" to "Schrack Seconet Care Communication GmbH"
archived source →
2026-07-17Assigned to "Schrack Seconet Care Communication GmbH"

Nearby in the registry

The prefixes assigned immediately before and after 64:B6:23:

FAQ

Which company owns MAC address prefix 64:B6:23?: MAC address prefix 64:B6:23 is registered to Schrack Seconet Care Communication GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 64:B6:23 has a network interface built by Schrack Seconet Care Communication GmbH.
What is the OUI 64:B6:23?: 64:B6:23 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Schrack Seconet Care Communication GmbH. It covers every address from 64:B6:23:00:00:00 to 64:B6:23:FF:FF:FF, or 16,777,216 addresses in total. It is also written 64-B6-23.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 64:B6:23:00:00:00 that is 64:B6:23 — 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 Schrack Seconet Care Communication GmbH located?: Schrack Seconet Care Communication GmbH is listed at Eibesbrunnergasse 18 Vienna AT 1120 in the IEEE OUI registry entry for 64:B6:23. This is the address the organization registered with the IEEE, which may differ from its current operating address.