Which company owns MAC address prefix 50:A9:DE?

MAC address prefix 50:A9:DE is registered to Smartcom - Bulgaria AD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 50:A9:DE has a network interface built by Smartcom - Bulgaria AD.

What is the OUI 50:A9:DE?

50:A9:DE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Smartcom - Bulgaria AD. It covers every address from 50:A9:DE:00:00:00 to 50:A9:DE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 50-A9-DE.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 50:A9:DE:00:00:00 that is 50:A9:DE — 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 Smartcom - Bulgaria AD located?

Smartcom - Bulgaria AD is listed at BIC IZOT, Building 1, Floor 3, Office 317 Sofia Sofia BG 1784 in the IEEE OUI registry entry for 50:A9:DE. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Smartcom - Bulgaria AD

MAC address prefix 50:A9:DE is registered to Smartcom - Bulgaria AD in the IEEE OUI registry. Any device whose MAC address begins with 50:A9:DE has a network interface built by Smartcom - Bulgaria AD. 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 50:A9:DE:00:00:00 to 50:A9:DE:FF:FF:FF.

OUI prefix: 50:A9:DE
Hyphen form: 50-A9-DE
MAC range: 50:A9:DE:00:00:00 – 50:A9:DE:FF:FF:FF
Addresses in block: 16,777,216
Organization: Smartcom - Bulgaria AD
Address: BIC IZOT, Building 1, Floor 3, Office 317 Sofia Sofia BG 1784
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 "Smartcom - Bulgaria AD"
archived source →
2026-07-17Assigned to "Smartcom - Bulgaria AD"

Nearby in the registry

The prefixes assigned immediately before and after 50:A9:DE:

FAQ

Which company owns MAC address prefix 50:A9:DE?: MAC address prefix 50:A9:DE is registered to Smartcom - Bulgaria AD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 50:A9:DE has a network interface built by Smartcom - Bulgaria AD.
What is the OUI 50:A9:DE?: 50:A9:DE is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Smartcom - Bulgaria AD. It covers every address from 50:A9:DE:00:00:00 to 50:A9:DE:FF:FF:FF, or 16,777,216 addresses in total. It is also written 50-A9-DE.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 50:A9:DE:00:00:00 that is 50:A9:DE — 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 Smartcom - Bulgaria AD located?: Smartcom - Bulgaria AD is listed at BIC IZOT, Building 1, Floor 3, Office 317 Sofia Sofia BG 1784 in the IEEE OUI registry entry for 50:A9:DE. This is the address the organization registered with the IEEE, which may differ from its current operating address.