Which company owns MAC address prefix CC:1E:FF?

MAC address prefix CC:1E:FF is registered to Metrological Group BV in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:1E:FF has a network interface built by Metrological Group BV.

What is the OUI CC:1E:FF?

CC:1E:FF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Metrological Group BV. It covers every address from CC:1E:FF:00:00:00 to CC:1E:FF:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-1E-FF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in CC:1E:FF:00:00:00 that is CC:1E:FF — 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 Metrological Group BV located?

Metrological Group BV is listed at Mariniersweg 151 Rotterdam Zuid-Holland NL 3011NK in the IEEE OUI registry entry for CC:1E:FF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Metrological Group BV

MAC address prefix CC:1E:FF is registered to Metrological Group BV in the IEEE OUI registry. Any device whose MAC address begins with CC:1E:FF has a network interface built by Metrological Group BV. 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 CC:1E:FF:00:00:00 to CC:1E:FF:FF:FF:FF.

OUI prefix: CC:1E:FF
Hyphen form: CC-1E-FF
MAC range: CC:1E:FF:00:00:00 – CC:1E:FF:FF:FF:FF
Addresses in block: 16,777,216
Organization: Metrological Group BV
Address: Mariniersweg 151 Rotterdam Zuid-Holland NL 3011NK
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 "Metrological Group BV"
archived source →
2026-07-17Assigned to "Metrological Group BV"

Nearby in the registry

The prefixes assigned immediately before and after CC:1E:FF:

FAQ

Which company owns MAC address prefix CC:1E:FF?: MAC address prefix CC:1E:FF is registered to Metrological Group BV in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:1E:FF has a network interface built by Metrological Group BV.
What is the OUI CC:1E:FF?: CC:1E:FF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Metrological Group BV. It covers every address from CC:1E:FF:00:00:00 to CC:1E:FF:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-1E-FF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in CC:1E:FF:00:00:00 that is CC:1E:FF — 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 Metrological Group BV located?: Metrological Group BV is listed at Mariniersweg 151 Rotterdam Zuid-Holland NL 3011NK in the IEEE OUI registry entry for CC:1E:FF. This is the address the organization registered with the IEEE, which may differ from its current operating address.