Which company owns MAC address prefix 90:B4:DD?

MAC address prefix 90:B4:DD is registered to ZPT R&D in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 90:B4:DD has a network interface built by ZPT R&D.

What is the OUI 90:B4:DD?

90:B4:DD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ZPT R&D. It covers every address from 90:B4:DD:00:00:00 to 90:B4:DD:FF:FF:FF, or 16,777,216 addresses in total. It is also written 90-B4-DD.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 90:B4:DD:00:00:00 that is 90:B4:DD — 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 ZPT R&D located?

ZPT R&D is listed at Hovås Snöbärsväg 2, lgh 201 Hovås SE 43654 in the IEEE OUI registry entry for 90:B4:DD. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ZPT R&D

MAC address prefix 90:B4:DD is registered to ZPT R&D in the IEEE OUI registry. Any device whose MAC address begins with 90:B4:DD has a network interface built by ZPT R&D. 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 90:B4:DD:00:00:00 to 90:B4:DD:FF:FF:FF.

OUI prefix: 90:B4:DD
Hyphen form: 90-B4-DD
MAC range: 90:B4:DD:00:00:00 – 90:B4:DD:FF:FF:FF
Addresses in block: 16,777,216
Organization: ZPT R&D
Address: Hovås Snöbärsväg 2, lgh 201 Hovås SE 43654
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 (5)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2020-11-28Assigned to "Private"
archived source →
2022-09-05Renamed from "Private" to "ZPT R&D"
archived source →
2023-07-11Renamed from "ZPT R&D" to "Private"
archived source →
2024-04-16Renamed from "Private" to "ZPT R&D"
archived source →
2026-07-17Assigned to "ZPT R&D"

Nearby in the registry

The prefixes assigned immediately before and after 90:B4:DD:

FAQ

Which company owns MAC address prefix 90:B4:DD?: MAC address prefix 90:B4:DD is registered to ZPT R&D in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 90:B4:DD has a network interface built by ZPT R&D.
What is the OUI 90:B4:DD?: 90:B4:DD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ZPT R&D. It covers every address from 90:B4:DD:00:00:00 to 90:B4:DD:FF:FF:FF, or 16,777,216 addresses in total. It is also written 90-B4-DD.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 90:B4:DD:00:00:00 that is 90:B4:DD — 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 ZPT R&D located?: ZPT R&D is listed at Hovås Snöbärsväg 2, lgh 201 Hovås SE 43654 in the IEEE OUI registry entry for 90:B4:DD. This is the address the organization registered with the IEEE, which may differ from its current operating address.