Which company owns MAC address prefix B4:46:6B?

MAC address prefix B4:46:6B is registered to REALTIMEID AS in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:46:6B has a network interface built by REALTIMEID AS.

What is the OUI B4:46:6B?

B4:46:6B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to REALTIMEID AS. It covers every address from B4:46:6B:00:00:00 to B4:46:6B:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-46-6B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:46:6B:00:00:00 that is B4:46:6B — 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 REALTIMEID AS located?

REALTIMEID AS is listed at Busk Bruns veg 1 , 7760 Snåsa (Norway) Snåsa NO 7760 in the IEEE OUI registry entry for B4:46:6B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

REALTIMEID AS

MAC address prefix B4:46:6B is registered to REALTIMEID AS in the IEEE OUI registry. Any device whose MAC address begins with B4:46:6B has a network interface built by REALTIMEID AS. 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 B4:46:6B:00:00:00 to B4:46:6B:FF:FF:FF.

OUI prefix: B4:46:6B
Hyphen form: B4-46-6B
MAC range: B4:46:6B:00:00:00 – B4:46:6B:FF:FF:FF
Addresses in block: 16,777,216
Organization: REALTIMEID AS
Address: Busk Bruns veg 1 , 7760 Snåsa (Norway) Snåsa NO 7760
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.

2022-07-11Assigned to "REALTIMEID AS"
archived source →
2026-07-17Assigned to "REALTIMEID AS"

Nearby in the registry

The prefixes assigned immediately before and after B4:46:6B:

FAQ

Which company owns MAC address prefix B4:46:6B?: MAC address prefix B4:46:6B is registered to REALTIMEID AS in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:46:6B has a network interface built by REALTIMEID AS.
What is the OUI B4:46:6B?: B4:46:6B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to REALTIMEID AS. It covers every address from B4:46:6B:00:00:00 to B4:46:6B:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-46-6B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:46:6B:00:00:00 that is B4:46:6B — 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 REALTIMEID AS located?: REALTIMEID AS is listed at Busk Bruns veg 1 , 7760 Snåsa (Norway) Snåsa NO 7760 in the IEEE OUI registry entry for B4:46:6B. This is the address the organization registered with the IEEE, which may differ from its current operating address.