Which company owns MAC address prefix B4:2A:39?

MAC address prefix B4:2A:39 is registered to ORBIT MERRET, spol. s r. o. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:2A:39 has a network interface built by ORBIT MERRET, spol. s r. o..

What is the OUI B4:2A:39?

B4:2A:39 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ORBIT MERRET, spol. s r. o.. It covers every address from B4:2A:39:00:00:00 to B4:2A:39:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-2A-39.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:2A:39:00:00:00 that is B4:2A:39 — 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 ORBIT MERRET, spol. s r. o. located?

ORBIT MERRET, spol. s r. o. is listed at Vodnanska 675/30 Praha CZ 198 00 in the IEEE OUI registry entry for B4:2A:39. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ORBIT MERRET, spol. s r. o.

MAC address prefix B4:2A:39 is registered to ORBIT MERRET, spol. s r. o. in the IEEE OUI registry. Any device whose MAC address begins with B4:2A:39 has a network interface built by ORBIT MERRET, spol. s r. 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 B4:2A:39:00:00:00 to B4:2A:39:FF:FF:FF.

OUI prefix: B4:2A:39
Hyphen form: B4-2A-39
MAC range: B4:2A:39:00:00:00 – B4:2A:39:FF:FF:FF
Addresses in block: 16,777,216
Organization: ORBIT MERRET, spol. s r. o.
Address: Vodnanska 675/30 Praha CZ 198 00
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 "ORBIT MERRET, spol. s r. o."
archived source →
2026-07-17Assigned to "ORBIT MERRET, spol. s r. o."

Nearby in the registry

The prefixes assigned immediately before and after B4:2A:39:

FAQ

Which company owns MAC address prefix B4:2A:39?: MAC address prefix B4:2A:39 is registered to ORBIT MERRET, spol. s r. o. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:2A:39 has a network interface built by ORBIT MERRET, spol. s r. o..
What is the OUI B4:2A:39?: B4:2A:39 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ORBIT MERRET, spol. s r. o.. It covers every address from B4:2A:39:00:00:00 to B4:2A:39:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-2A-39.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:2A:39:00:00:00 that is B4:2A:39 — 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 ORBIT MERRET, spol. s r. o. located?: ORBIT MERRET, spol. s r. o. is listed at Vodnanska 675/30 Praha CZ 198 00 in the IEEE OUI registry entry for B4:2A:39. This is the address the organization registered with the IEEE, which may differ from its current operating address.