Which company owns MAC address prefix 80:D3:36?

MAC address prefix 80:D3:36 is registered to CERN in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 80:D3:36 has a network interface built by CERN.

What is the OUI 80:D3:36?

80:D3:36 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CERN. It covers every address from 80:D3:36:00:00:00 to 80:D3:36:FF:FF:FF, or 16,777,216 addresses in total. It is also written 80-D3-36.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 80:D3:36:00:00:00 that is 80:D3:36 — 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 CERN located?

CERN is listed at CH-1211 GENEVE SUISSE/SWITZ CH 023 in the IEEE OUI registry entry for 80:D3:36. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does CERN own?

CERN holds 2 OUI prefixes in the IEEE registry, of which 80:D3:36 is one. A device made by CERN could carry a MAC address from any of them.

CERN

MAC address prefix 80:D3:36 is registered to CERN in the IEEE OUI registry. Any device whose MAC address begins with 80:D3:36 has a network interface built by CERN. 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 80:D3:36:00:00:00 to 80:D3:36:FF:FF:FF.

OUI prefix: 80:D3:36
Hyphen form: 80-D3-36
MAC range: 80:D3:36:00:00:00 – 80:D3:36:FF:FF:FF
Addresses in block: 16,777,216
Organization: CERN
Address: CH-1211 GENEVE SUISSE/SWITZ CH 023
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.

Other prefixes from CERN

CERN holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

08:00:30

Assignment history (2)

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

2018-12-21Assigned to "CERN"
archived source →
2026-07-17Assigned to "CERN"

Nearby in the registry

The prefixes assigned immediately before and after 80:D3:36:

FAQ

Which company owns MAC address prefix 80:D3:36?: MAC address prefix 80:D3:36 is registered to CERN in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 80:D3:36 has a network interface built by CERN.
What is the OUI 80:D3:36?: 80:D3:36 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CERN. It covers every address from 80:D3:36:00:00:00 to 80:D3:36:FF:FF:FF, or 16,777,216 addresses in total. It is also written 80-D3-36.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 80:D3:36:00:00:00 that is 80:D3:36 — 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 CERN located?: CERN is listed at CH-1211 GENEVE SUISSE/SWITZ CH 023 in the IEEE OUI registry entry for 80:D3:36. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does CERN own?: CERN holds 2 OUI prefixes in the IEEE registry, of which 80:D3:36 is one. A device made by CERN could carry a MAC address from any of them.