Which company owns MAC address prefix B0:A6:F5?

MAC address prefix B0:A6:F5 is registered to Xaptum, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:A6:F5 has a network interface built by Xaptum, Inc..

What is the OUI B0:A6:F5?

B0:A6:F5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Xaptum, Inc.. It covers every address from B0:A6:F5:00:00:00 to B0:A6:F5:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-A6-F5.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B0:A6:F5:00:00:00 that is B0:A6:F5 — 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 Xaptum, Inc. located?

Xaptum, Inc. is listed at 350 W Ontario ST FL 4 Chicago IL US 60654 in the IEEE OUI registry entry for B0:A6:F5. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Xaptum, Inc.

MAC address prefix B0:A6:F5 is registered to Xaptum, Inc. in the IEEE OUI registry. Any device whose MAC address begins with B0:A6:F5 has a network interface built by Xaptum, Inc.. 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 B0:A6:F5:00:00:00 to B0:A6:F5:FF:FF:FF.

OUI prefix: B0:A6:F5
Hyphen form: B0-A6-F5
MAC range: B0:A6:F5:00:00:00 – B0:A6:F5:FF:FF:FF
Addresses in block: 16,777,216
Organization: Xaptum, Inc.
Address: 350 W Ontario ST FL 4 Chicago IL US 60654
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.

2019-07-04Assigned to "Xaptum, Inc."
archived source →
2026-07-17Assigned to "Xaptum, Inc."

Nearby in the registry

The prefixes assigned immediately before and after B0:A6:F5:

FAQ

Which company owns MAC address prefix B0:A6:F5?: MAC address prefix B0:A6:F5 is registered to Xaptum, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:A6:F5 has a network interface built by Xaptum, Inc..
What is the OUI B0:A6:F5?: B0:A6:F5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Xaptum, Inc.. It covers every address from B0:A6:F5:00:00:00 to B0:A6:F5:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-A6-F5.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B0:A6:F5:00:00:00 that is B0:A6:F5 — 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 Xaptum, Inc. located?: Xaptum, Inc. is listed at 350 W Ontario ST FL 4 Chicago IL US 60654 in the IEEE OUI registry entry for B0:A6:F5. This is the address the organization registered with the IEEE, which may differ from its current operating address.