Which company owns MAC address prefix CC:9F:35?

MAC address prefix CC:9F:35 is registered to Transbit Sp. z o.o. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:9F:35 has a network interface built by Transbit Sp. z o.o..

What is the OUI CC:9F:35?

CC:9F:35 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Transbit Sp. z o.o.. It covers every address from CC:9F:35:00:00:00 to CC:9F:35:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-9F-35.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in CC:9F:35:00:00:00 that is CC:9F:35 — 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 Transbit Sp. z o.o. located?

Transbit Sp. z o.o. is listed at Przyczolkowa 109A Warsaw PL 02-968 in the IEEE OUI registry entry for CC:9F:35. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Transbit Sp. z o.o.

MAC address prefix CC:9F:35 is registered to Transbit Sp. z o.o. in the IEEE OUI registry. Any device whose MAC address begins with CC:9F:35 has a network interface built by Transbit Sp. z o.o.. 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:9F:35:00:00:00 to CC:9F:35:FF:FF:FF.

OUI prefix: CC:9F:35
Hyphen form: CC-9F-35
MAC range: CC:9F:35:00:00:00 – CC:9F:35:FF:FF:FF
Addresses in block: 16,777,216
Organization: Transbit Sp. z o.o.
Address: Przyczolkowa 109A Warsaw PL 02-968
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 "Transbit Sp. z o.o."
archived source →
2026-07-17Assigned to "Transbit Sp. z o.o."

Nearby in the registry

The prefixes assigned immediately before and after CC:9F:35:

FAQ

Which company owns MAC address prefix CC:9F:35?: MAC address prefix CC:9F:35 is registered to Transbit Sp. z o.o. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with CC:9F:35 has a network interface built by Transbit Sp. z o.o..
What is the OUI CC:9F:35?: CC:9F:35 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Transbit Sp. z o.o.. It covers every address from CC:9F:35:00:00:00 to CC:9F:35:FF:FF:FF, or 16,777,216 addresses in total. It is also written CC-9F-35.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in CC:9F:35:00:00:00 that is CC:9F:35 — 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 Transbit Sp. z o.o. located?: Transbit Sp. z o.o. is listed at Przyczolkowa 109A Warsaw PL 02-968 in the IEEE OUI registry entry for CC:9F:35. This is the address the organization registered with the IEEE, which may differ from its current operating address.