Which company owns MAC address prefix 30:55:ED?

MAC address prefix 30:55:ED is registered to Trex Network LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:55:ED has a network interface built by Trex Network LLC.

What is the OUI 30:55:ED?

30:55:ED is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Trex Network LLC. It covers every address from 30:55:ED:00:00:00 to 30:55:ED:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-55-ED.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 30:55:ED:00:00:00 that is 30:55:ED — 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 Trex Network LLC located?

Trex Network LLC is listed at Room 505, Tower B Nongke Building, Beijing CN 100097 in the IEEE OUI registry entry for 30:55:ED. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Trex Network LLC

MAC address prefix 30:55:ED is registered to Trex Network LLC in the IEEE OUI registry. Any device whose MAC address begins with 30:55:ED has a network interface built by Trex Network LLC. 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 30:55:ED:00:00:00 to 30:55:ED:FF:FF:FF.

OUI prefix: 30:55:ED
Hyphen form: 30-55-ED
MAC range: 30:55:ED:00:00:00 – 30:55:ED:FF:FF:FF
Addresses in block: 16,777,216
Organization: Trex Network LLC
Address: Room 505, Tower B Nongke Building, Beijing CN 100097
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 "Trex Network LLC"
archived source →
2026-07-17Assigned to "Trex Network LLC"

Nearby in the registry

The prefixes assigned immediately before and after 30:55:ED:

FAQ

Which company owns MAC address prefix 30:55:ED?: MAC address prefix 30:55:ED is registered to Trex Network LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:55:ED has a network interface built by Trex Network LLC.
What is the OUI 30:55:ED?: 30:55:ED is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Trex Network LLC. It covers every address from 30:55:ED:00:00:00 to 30:55:ED:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-55-ED.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 30:55:ED:00:00:00 that is 30:55:ED — 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 Trex Network LLC located?: Trex Network LLC is listed at Room 505, Tower B Nongke Building, Beijing CN 100097 in the IEEE OUI registry entry for 30:55:ED. This is the address the organization registered with the IEEE, which may differ from its current operating address.