Which company owns MAC address prefix CC:34:D7?

MAC address prefix CC:34:D7 is registered to GEWISS S.P.A. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:34:D7 has a network interface built by GEWISS S.P.A..

What is the OUI CC:34:D7?

CC:34:D7 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GEWISS S.P.A.. It covers every address from CC:34:D7:00:00:00 to CC:34:D7:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-34-D7.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in CC:34:D7:00:00:00 that is CC:34:D7 — 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 GEWISS S.P.A. located?

GEWISS S.P.A. is listed at VIA ALESSANDRO VOLTA 1 CENATE SOTTO IT 24069 in the IEEE OUI registry entry for CC:34:D7. This is the address the organization registered with the IEEE, which may differ from its current operating address.

GEWISS S.P.A.

MAC address prefix CC:34:D7 is registered to GEWISS S.P.A. in the IEEE OUI registry. Any device whose MAC address begins with CC:34:D7 has a network interface built by GEWISS S.P.A.. 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:34:D7:00:00:00 to CC:34:D7:FF:FF:FF.

OUI prefix: CC:34:D7
Hyphen form: CC-34-D7
MAC range: CC:34:D7:00:00:00 – CC:34:D7:FF:FF:FF
Addresses in block: 16,777,216
Organization: GEWISS S.P.A.
Address: VIA ALESSANDRO VOLTA 1 CENATE SOTTO IT 24069
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 "GEWISS S.P.A."
archived source →
2026-07-17Assigned to "GEWISS S.P.A."

Nearby in the registry

The prefixes assigned immediately before and after CC:34:D7:

FAQ

Which company owns MAC address prefix CC:34:D7?: MAC address prefix CC:34:D7 is registered to GEWISS S.P.A. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:34:D7 has a network interface built by GEWISS S.P.A..
What is the OUI CC:34:D7?: CC:34:D7 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GEWISS S.P.A.. It covers every address from CC:34:D7:00:00:00 to CC:34:D7:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-34-D7.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in CC:34:D7:00:00:00 that is CC:34:D7 — 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 GEWISS S.P.A. located?: GEWISS S.P.A. is listed at VIA ALESSANDRO VOLTA 1 CENATE SOTTO IT 24069 in the IEEE OUI registry entry for CC:34:D7. This is the address the organization registered with the IEEE, which may differ from its current operating address.