Which company owns MAC address prefix E8:C3:20?

MAC address prefix E8:C3:20 is registered to Austco Marketing & Service (USA) ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E8:C3:20 has a network interface built by Austco Marketing & Service (USA) ltd..

What is the OUI E8:C3:20?

E8:C3:20 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Austco Marketing & Service (USA) ltd.. It covers every address from E8:C3:20:00:00:00 to E8:C3:20:FF:FF:FF, or 16,777,216 addresses in total. It is also written E8-C3-20.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E8:C3:20:00:00:00 that is E8:C3:20 — 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 Austco Marketing & Service (USA) ltd. located?

Austco Marketing & Service (USA) ltd. is listed at 9155 Sterling St Unit 100 Irving TX US 75063 in the IEEE OUI registry entry for E8:C3:20. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Austco Marketing & Service (USA) ltd.

MAC address prefix E8:C3:20 is registered to Austco Marketing & Service (USA) ltd. in the IEEE OUI registry. Any device whose MAC address begins with E8:C3:20 has a network interface built by Austco Marketing & Service (USA) ltd.. 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 E8:C3:20:00:00:00 to E8:C3:20:FF:FF:FF.

OUI prefix: E8:C3:20
Hyphen form: E8-C3-20
MAC range: E8:C3:20:00:00:00 – E8:C3:20:FF:FF:FF
Addresses in block: 16,777,216
Organization: Austco Marketing & Service (USA) ltd.
Address: 9155 Sterling St Unit 100 Irving TX US 75063
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 (3)

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 "Austco Communication Systems Pty Ltd"
archived source →
2020-11-28Renamed from "Austco Communication Systems Pty Ltd" to "Austco Marketing & Service (USA) ltd."
archived source →
2026-07-17Assigned to "Austco Marketing & Service (USA) ltd."

Nearby in the registry

The prefixes assigned immediately before and after E8:C3:20:

FAQ

Which company owns MAC address prefix E8:C3:20?: MAC address prefix E8:C3:20 is registered to Austco Marketing & Service (USA) ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E8:C3:20 has a network interface built by Austco Marketing & Service (USA) ltd..
What is the OUI E8:C3:20?: E8:C3:20 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Austco Marketing & Service (USA) ltd.. It covers every address from E8:C3:20:00:00:00 to E8:C3:20:FF:FF:FF, or 16,777,216 addresses in total. It is also written E8-C3-20.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E8:C3:20:00:00:00 that is E8:C3:20 — 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 Austco Marketing & Service (USA) ltd. located?: Austco Marketing & Service (USA) ltd. is listed at 9155 Sterling St Unit 100 Irving TX US 75063 in the IEEE OUI registry entry for E8:C3:20. This is the address the organization registered with the IEEE, which may differ from its current operating address.