Which company owns MAC address prefix 80:20:AF?

MAC address prefix 80:20:AF is registered to Trade FIDES, a.s. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 80:20:AF has a network interface built by Trade FIDES, a.s..

What is the OUI 80:20:AF?

80:20:AF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Trade FIDES, a.s.. It covers every address from 80:20:AF:00:00:00 to 80:20:AF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 80-20-AF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 80:20:AF:00:00:00 that is 80:20:AF — 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 Trade FIDES, a.s. located?

Trade FIDES, a.s. is listed at Dornych 57 Brno CZ 61700 in the IEEE OUI registry entry for 80:20:AF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Trade FIDES, a.s.

MAC address prefix 80:20:AF is registered to Trade FIDES, a.s. in the IEEE OUI registry. Any device whose MAC address begins with 80:20:AF has a network interface built by Trade FIDES, a.s.. 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 80:20:AF:00:00:00 to 80:20:AF:FF:FF:FF.

OUI prefix: 80:20:AF
Hyphen form: 80-20-AF
MAC range: 80:20:AF:00:00:00 – 80:20:AF:FF:FF:FF
Addresses in block: 16,777,216
Organization: Trade FIDES, a.s.
Address: Dornych 57 Brno CZ 61700
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 "Trade FIDES, a.s."
archived source →
2026-07-17Assigned to "Trade FIDES, a.s."

Nearby in the registry

The prefixes assigned immediately before and after 80:20:AF:

FAQ

Which company owns MAC address prefix 80:20:AF?: MAC address prefix 80:20:AF is registered to Trade FIDES, a.s. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 80:20:AF has a network interface built by Trade FIDES, a.s..
What is the OUI 80:20:AF?: 80:20:AF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Trade FIDES, a.s.. It covers every address from 80:20:AF:00:00:00 to 80:20:AF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 80-20-AF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 80:20:AF:00:00:00 that is 80:20:AF — 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 Trade FIDES, a.s. located?: Trade FIDES, a.s. is listed at Dornych 57 Brno CZ 61700 in the IEEE OUI registry entry for 80:20:AF. This is the address the organization registered with the IEEE, which may differ from its current operating address.