Which company owns MAC address prefix 50:F0:03?

MAC address prefix 50:F0:03 is registered to Open Stack, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 50:F0:03 has a network interface built by Open Stack, Inc..

What is the OUI 50:F0:03?

50:F0:03 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Open Stack, Inc.. It covers every address from 50:F0:03:00:00:00 to 50:F0:03:FF:FF:FF, or 16,777,216 addresses in total. It is also written 50-F0-03.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 50:F0:03:00:00:00 that is 50:F0:03 — 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 Open Stack, Inc. located?

Open Stack, Inc. is listed at Advanced Research Center #411 Bun-Dang, Seong-Nam Gyung-Gi KR 463-816 in the IEEE OUI registry entry for 50:F0:03. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Open Stack, Inc.

MAC address prefix 50:F0:03 is registered to Open Stack, Inc. in the IEEE OUI registry. Any device whose MAC address begins with 50:F0:03 has a network interface built by Open Stack, 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 50:F0:03:00:00:00 to 50:F0:03:FF:FF:FF.

OUI prefix: 50:F0:03
Hyphen form: 50-F0-03
MAC range: 50:F0:03:00:00:00 – 50:F0:03:FF:FF:FF
Addresses in block: 16,777,216
Organization: Open Stack, Inc.
Address: Advanced Research Center #411 Bun-Dang, Seong-Nam Gyung-Gi KR 463-816
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 "Open Stack, Inc."
archived source →
2026-07-17Assigned to "Open Stack, Inc."

Nearby in the registry

The prefixes assigned immediately before and after 50:F0:03:

FAQ

Which company owns MAC address prefix 50:F0:03?: MAC address prefix 50:F0:03 is registered to Open Stack, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 50:F0:03 has a network interface built by Open Stack, Inc..
What is the OUI 50:F0:03?: 50:F0:03 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Open Stack, Inc.. It covers every address from 50:F0:03:00:00:00 to 50:F0:03:FF:FF:FF, or 16,777,216 addresses in total. It is also written 50-F0-03.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 50:F0:03:00:00:00 that is 50:F0:03 — 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 Open Stack, Inc. located?: Open Stack, Inc. is listed at Advanced Research Center #411 Bun-Dang, Seong-Nam Gyung-Gi KR 463-816 in the IEEE OUI registry entry for 50:F0:03. This is the address the organization registered with the IEEE, which may differ from its current operating address.