Which company owns MAC address prefix 78:88:8A?

MAC address prefix 78:88:8A is registered to CDR Sp. z o.o. Sp. k. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 78:88:8A has a network interface built by CDR Sp. z o.o. Sp. k..

What is the OUI 78:88:8A?

78:88:8A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CDR Sp. z o.o. Sp. k.. It covers every address from 78:88:8A:00:00:00 to 78:88:8A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 78-88-8A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 78:88:8A:00:00:00 that is 78:88:8A — 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 CDR Sp. z o.o. Sp. k. located?

CDR Sp. z o.o. Sp. k. is listed at Palki 15 Zory PL 44-240 in the IEEE OUI registry entry for 78:88:8A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

CDR Sp. z o.o. Sp. k.

MAC address prefix 78:88:8A is registered to CDR Sp. z o.o. Sp. k. in the IEEE OUI registry. Any device whose MAC address begins with 78:88:8A has a network interface built by CDR Sp. z o.o. Sp. k.. 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 78:88:8A:00:00:00 to 78:88:8A:FF:FF:FF.

OUI prefix: 78:88:8A
Hyphen form: 78-88-8A
MAC range: 78:88:8A:00:00:00 – 78:88:8A:FF:FF:FF
Addresses in block: 16,777,216
Organization: CDR Sp. z o.o. Sp. k.
Address: Palki 15 Zory PL 44-240
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 "CDR Sp. z o.o. Sp. k."
archived source →
2026-07-17Assigned to "CDR Sp. z o.o. Sp. k."

Nearby in the registry

The prefixes assigned immediately before and after 78:88:8A:

FAQ

Which company owns MAC address prefix 78:88:8A?: MAC address prefix 78:88:8A is registered to CDR Sp. z o.o. Sp. k. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 78:88:8A has a network interface built by CDR Sp. z o.o. Sp. k..
What is the OUI 78:88:8A?: 78:88:8A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CDR Sp. z o.o. Sp. k.. It covers every address from 78:88:8A:00:00:00 to 78:88:8A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 78-88-8A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 78:88:8A:00:00:00 that is 78:88:8A — 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 CDR Sp. z o.o. Sp. k. located?: CDR Sp. z o.o. Sp. k. is listed at Palki 15 Zory PL 44-240 in the IEEE OUI registry entry for 78:88:8A. This is the address the organization registered with the IEEE, which may differ from its current operating address.