Which company owns MAC address prefix 00:50:EB?

MAC address prefix 00:50:EB is registered to ALPHA-TOP CORPORATION in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:50:EB has a network interface built by ALPHA-TOP CORPORATION.

What is the OUI 00:50:EB?

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

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:50:EB:00:00:00 that is 00:50:EB — 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 ALPHA-TOP CORPORATION located?

ALPHA-TOP CORPORATION is listed at 19F., NO. 2, LANE 150 TAIPEI TW in the IEEE OUI registry entry for 00:50:EB. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ALPHA-TOP CORPORATION

MAC address prefix 00:50:EB is registered to ALPHA-TOP CORPORATION in the IEEE OUI registry. Any device whose MAC address begins with 00:50:EB has a network interface built by ALPHA-TOP CORPORATION. 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 00:50:EB:00:00:00 to 00:50:EB:FF:FF:FF.

OUI prefix: 00:50:EB
Hyphen form: 00-50-EB
MAC range: 00:50:EB:00:00:00 – 00:50:EB:FF:FF:FF
Addresses in block: 16,777,216
Organization: ALPHA-TOP CORPORATION
Address: 19F., NO. 2, LANE 150 TAIPEI TW
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 "ALPHA-TOP CORPORATION"
archived source →
2026-07-17Assigned to "ALPHA-TOP CORPORATION"

Nearby in the registry

The prefixes assigned immediately before and after 00:50:EB:

FAQ

Which company owns MAC address prefix 00:50:EB?: MAC address prefix 00:50:EB is registered to ALPHA-TOP CORPORATION in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:50:EB has a network interface built by ALPHA-TOP CORPORATION.
What is the OUI 00:50:EB?: 00:50:EB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ALPHA-TOP CORPORATION. It covers every address from 00:50:EB:00:00:00 to 00:50:EB:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-50-EB.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:50:EB:00:00:00 that is 00:50:EB — 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 ALPHA-TOP CORPORATION located?: ALPHA-TOP CORPORATION is listed at 19F., NO. 2, LANE 150 TAIPEI TW in the IEEE OUI registry entry for 00:50:EB. This is the address the organization registered with the IEEE, which may differ from its current operating address.