Which company owns MAC address prefix B4:0A:C6?

MAC address prefix B4:0A:C6 is registered to DEXON Systems Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:0A:C6 has a network interface built by DEXON Systems Ltd..

What is the OUI B4:0A:C6?

B4:0A:C6 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to DEXON Systems Ltd.. It covers every address from B4:0A:C6:00:00:00 to B4:0A:C6:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-0A-C6.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:0A:C6:00:00:00 that is B4:0A:C6 — 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 DEXON Systems Ltd. located?

DEXON Systems Ltd. is listed at Baross u. 165 Budaors Pest HU H-2040 in the IEEE OUI registry entry for B4:0A:C6. This is the address the organization registered with the IEEE, which may differ from its current operating address.

DEXON Systems Ltd.

MAC address prefix B4:0A:C6 is registered to DEXON Systems Ltd. in the IEEE OUI registry. Any device whose MAC address begins with B4:0A:C6 has a network interface built by DEXON Systems Ltd.. 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 B4:0A:C6:00:00:00 to B4:0A:C6:FF:FF:FF.

OUI prefix: B4:0A:C6
Hyphen form: B4-0A-C6
MAC range: B4:0A:C6:00:00:00 – B4:0A:C6:FF:FF:FF
Addresses in block: 16,777,216
Organization: DEXON Systems Ltd.
Address: Baross u. 165 Budaors Pest HU H-2040
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 "DEXON Systems Ltd."
archived source →
2026-07-17Assigned to "DEXON Systems Ltd."

Nearby in the registry

The prefixes assigned immediately before and after B4:0A:C6:

FAQ

Which company owns MAC address prefix B4:0A:C6?: MAC address prefix B4:0A:C6 is registered to DEXON Systems Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:0A:C6 has a network interface built by DEXON Systems Ltd..
What is the OUI B4:0A:C6?: B4:0A:C6 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to DEXON Systems Ltd.. It covers every address from B4:0A:C6:00:00:00 to B4:0A:C6:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-0A-C6.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:0A:C6:00:00:00 that is B4:0A:C6 — 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 DEXON Systems Ltd. located?: DEXON Systems Ltd. is listed at Baross u. 165 Budaors Pest HU H-2040 in the IEEE OUI registry entry for B4:0A:C6. This is the address the organization registered with the IEEE, which may differ from its current operating address.