Which company owns MAC address prefix A8:CF:E0?

MAC address prefix A8:CF:E0 is registered to GDN Enterprises Private Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:CF:E0 has a network interface built by GDN Enterprises Private Limited.

What is the OUI A8:CF:E0?

A8:CF:E0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GDN Enterprises Private Limited. It covers every address from A8:CF:E0:00:00:00 to A8:CF:E0:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-CF-E0.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A8:CF:E0:00:00:00 that is A8:CF:E0 — 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 GDN Enterprises Private Limited located?

GDN Enterprises Private Limited is listed at D-348, Sector-63, Gautam Buddha Nagar, Noida, Uttar Pradesh - 201301 Noida Uttar Pradesh IN 201301 in the IEEE OUI registry entry for A8:CF:E0. This is the address the organization registered with the IEEE, which may differ from its current operating address.

GDN Enterprises Private Limited

MAC address prefix A8:CF:E0 is registered to GDN Enterprises Private Limited in the IEEE OUI registry. Any device whose MAC address begins with A8:CF:E0 has a network interface built by GDN Enterprises Private Limited. 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 A8:CF:E0:00:00:00 to A8:CF:E0:FF:FF:FF.

OUI prefix: A8:CF:E0
Hyphen form: A8-CF-E0
MAC range: A8:CF:E0:00:00:00 – A8:CF:E0:FF:FF:FF
Addresses in block: 16,777,216
Organization: GDN Enterprises Private Limited
Address: D-348, Sector-63, Gautam Buddha Nagar, Noida, Uttar Pradesh - 201301 Noida Uttar Pradesh IN 201301
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.

2024-02-15Assigned to "GDN Enterprises Private Limited"
archived source →
2026-07-17Assigned to "GDN Enterprises Private Limited"

Nearby in the registry

The prefixes assigned immediately before and after A8:CF:E0:

FAQ

Which company owns MAC address prefix A8:CF:E0?: MAC address prefix A8:CF:E0 is registered to GDN Enterprises Private Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:CF:E0 has a network interface built by GDN Enterprises Private Limited.
What is the OUI A8:CF:E0?: A8:CF:E0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GDN Enterprises Private Limited. It covers every address from A8:CF:E0:00:00:00 to A8:CF:E0:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-CF-E0.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A8:CF:E0:00:00:00 that is A8:CF:E0 — 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 GDN Enterprises Private Limited located?: GDN Enterprises Private Limited is listed at D-348, Sector-63, Gautam Buddha Nagar, Noida, Uttar Pradesh - 201301 Noida Uttar Pradesh IN 201301 in the IEEE OUI registry entry for A8:CF:E0. This is the address the organization registered with the IEEE, which may differ from its current operating address.