Which company owns MAC address prefix D0:84:5D?

MAC address prefix D0:84:5D is registered to B&C Transit, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D0:84:5D has a network interface built by B&C Transit, Inc..

What is the OUI D0:84:5D?

D0:84:5D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to B&C Transit, Inc.. It covers every address from D0:84:5D:00:00:00 to D0:84:5D:FF:FF:FF, or 16,777,216 addresses in total. It is also written D0-84-5D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D0:84:5D:00:00:00 that is D0:84:5D — 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 B&C Transit, Inc. located?

B&C Transit, Inc. is listed at 701 Seco Road Monroeville PA US 15146 in the IEEE OUI registry entry for D0:84:5D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

B&C Transit, Inc.

MAC address prefix D0:84:5D is registered to B&C Transit, Inc. in the IEEE OUI registry. Any device whose MAC address begins with D0:84:5D has a network interface built by B&C Transit, 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 D0:84:5D:00:00:00 to D0:84:5D:FF:FF:FF.

OUI prefix: D0:84:5D
Hyphen form: D0-84-5D
MAC range: D0:84:5D:00:00:00 – D0:84:5D:FF:FF:FF
Addresses in block: 16,777,216
Organization: B&C Transit, Inc.
Address: 701 Seco Road Monroeville PA US 15146
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.

2026-06-20Assigned to "B&C Transit, Inc."
archived source →
2026-07-17Assigned to "B&C Transit, Inc."

Nearby in the registry

The prefixes assigned immediately before and after D0:84:5D:

FAQ

Which company owns MAC address prefix D0:84:5D?: MAC address prefix D0:84:5D is registered to B&C Transit, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D0:84:5D has a network interface built by B&C Transit, Inc..
What is the OUI D0:84:5D?: D0:84:5D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to B&C Transit, Inc.. It covers every address from D0:84:5D:00:00:00 to D0:84:5D:FF:FF:FF, or 16,777,216 addresses in total. It is also written D0-84-5D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D0:84:5D:00:00:00 that is D0:84:5D — 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 B&C Transit, Inc. located?: B&C Transit, Inc. is listed at 701 Seco Road Monroeville PA US 15146 in the IEEE OUI registry entry for D0:84:5D. This is the address the organization registered with the IEEE, which may differ from its current operating address.