Which company owns MAC address prefix A4:DA:3F?

MAC address prefix A4:DA:3F is registered to Bionics Corp. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:DA:3F has a network interface built by Bionics Corp..

What is the OUI A4:DA:3F?

A4:DA:3F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Bionics Corp.. It covers every address from A4:DA:3F:00:00:00 to A4:DA:3F:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-DA-3F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A4:DA:3F:00:00:00 that is A4:DA:3F — 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 Bionics Corp. located?

Bionics Corp. is listed at 1406 Masters Tower Seoul KR 121-748 in the IEEE OUI registry entry for A4:DA:3F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Bionics Corp.

MAC address prefix A4:DA:3F is registered to Bionics Corp. in the IEEE OUI registry. Any device whose MAC address begins with A4:DA:3F has a network interface built by Bionics Corp.. 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 A4:DA:3F:00:00:00 to A4:DA:3F:FF:FF:FF.

OUI prefix: A4:DA:3F
Hyphen form: A4-DA-3F
MAC range: A4:DA:3F:00:00:00 – A4:DA:3F:FF:FF:FF
Addresses in block: 16,777,216
Organization: Bionics Corp.
Address: 1406 Masters Tower Seoul KR 121-748
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 "Bionics Corp."
archived source →
2026-07-17Assigned to "Bionics Corp."

Nearby in the registry

The prefixes assigned immediately before and after A4:DA:3F:

FAQ

Which company owns MAC address prefix A4:DA:3F?: MAC address prefix A4:DA:3F is registered to Bionics Corp. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:DA:3F has a network interface built by Bionics Corp..
What is the OUI A4:DA:3F?: A4:DA:3F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Bionics Corp.. It covers every address from A4:DA:3F:00:00:00 to A4:DA:3F:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-DA-3F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A4:DA:3F:00:00:00 that is A4:DA:3F — 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 Bionics Corp. located?: Bionics Corp. is listed at 1406 Masters Tower Seoul KR 121-748 in the IEEE OUI registry entry for A4:DA:3F. This is the address the organization registered with the IEEE, which may differ from its current operating address.