Which company owns MAC address prefix 5C:E2:23?

MAC address prefix 5C:E2:23 is registered to Delphin Technology AG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 5C:E2:23 has a network interface built by Delphin Technology AG.

What is the OUI 5C:E2:23?

5C:E2:23 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Delphin Technology AG. It covers every address from 5C:E2:23:00:00:00 to 5C:E2:23:FF:FF:FF, or 16,777,216 addresses in total. It is also written 5C-E2-23.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 5C:E2:23:00:00:00 that is 5C:E2:23 — 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 Delphin Technology AG located?

Delphin Technology AG is listed at Lustheide 81 Bergisch-Gladbach DE 51427 in the IEEE OUI registry entry for 5C:E2:23. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Delphin Technology AG

MAC address prefix 5C:E2:23 is registered to Delphin Technology AG in the IEEE OUI registry. Any device whose MAC address begins with 5C:E2:23 has a network interface built by Delphin Technology 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 5C:E2:23:00:00:00 to 5C:E2:23:FF:FF:FF.

OUI prefix: 5C:E2:23
Hyphen form: 5C-E2-23
MAC range: 5C:E2:23:00:00:00 – 5C:E2:23:FF:FF:FF
Addresses in block: 16,777,216
Organization: Delphin Technology AG
Address: Lustheide 81 Bergisch-Gladbach DE 51427
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 "Delphin Technology AG"
archived source →
2026-07-17Assigned to "Delphin Technology AG"

Nearby in the registry

The prefixes assigned immediately before and after 5C:E2:23:

FAQ

Which company owns MAC address prefix 5C:E2:23?: MAC address prefix 5C:E2:23 is registered to Delphin Technology AG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 5C:E2:23 has a network interface built by Delphin Technology AG.
What is the OUI 5C:E2:23?: 5C:E2:23 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Delphin Technology AG. It covers every address from 5C:E2:23:00:00:00 to 5C:E2:23:FF:FF:FF, or 16,777,216 addresses in total. It is also written 5C-E2-23.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 5C:E2:23:00:00:00 that is 5C:E2:23 — 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 Delphin Technology AG located?: Delphin Technology AG is listed at Lustheide 81 Bergisch-Gladbach DE 51427 in the IEEE OUI registry entry for 5C:E2:23. This is the address the organization registered with the IEEE, which may differ from its current operating address.