Which company owns MAC address prefix A0:DE:05?

MAC address prefix A0:DE:05 is registered to JSC "Irbis-T" in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:DE:05 has a network interface built by JSC "Irbis-T".

What is the OUI A0:DE:05?

A0:DE:05 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to JSC "Irbis-T". It covers every address from A0:DE:05:00:00:00 to A0:DE:05:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-DE-05.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A0:DE:05:00:00:00 that is A0:DE:05 — 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 JSC "Irbis-T" located?

JSC "Irbis-T" is listed at 39, Gorodskoy lane Tula RU 300012 in the IEEE OUI registry entry for A0:DE:05. This is the address the organization registered with the IEEE, which may differ from its current operating address.

JSC "Irbis-T"

MAC address prefix A0:DE:05 is registered to JSC "Irbis-T" in the IEEE OUI registry. Any device whose MAC address begins with A0:DE:05 has a network interface built by JSC "Irbis-T". 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 A0:DE:05:00:00:00 to A0:DE:05:FF:FF:FF.

OUI prefix: A0:DE:05
Hyphen form: A0-DE-05
MAC range: A0:DE:05:00:00:00 – A0:DE:05:FF:FF:FF
Addresses in block: 16,777,216
Organization: JSC "Irbis-T"
Address: 39, Gorodskoy lane Tula RU 300012
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 "JSC "Irbis-T""
archived source →
2026-07-17Assigned to "JSC "Irbis-T""

Nearby in the registry

The prefixes assigned immediately before and after A0:DE:05:

FAQ

Which company owns MAC address prefix A0:DE:05?: MAC address prefix A0:DE:05 is registered to JSC "Irbis-T" in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:DE:05 has a network interface built by JSC "Irbis-T".
What is the OUI A0:DE:05?: A0:DE:05 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to JSC "Irbis-T". It covers every address from A0:DE:05:00:00:00 to A0:DE:05:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-DE-05.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A0:DE:05:00:00:00 that is A0:DE:05 — 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 JSC "Irbis-T" located?: JSC "Irbis-T" is listed at 39, Gorodskoy lane Tula RU 300012 in the IEEE OUI registry entry for A0:DE:05. This is the address the organization registered with the IEEE, which may differ from its current operating address.