Which company owns MAC address prefix AC:E8:7E?

MAC address prefix AC:E8:7E is registered to Bytemark Computer Consulting Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:E8:7E has a network interface built by Bytemark Computer Consulting Ltd.

What is the OUI AC:E8:7E?

AC:E8:7E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Bytemark Computer Consulting Ltd. It covers every address from AC:E8:7E:00:00:00 to AC:E8:7E:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-E8-7E.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:E8:7E:00:00:00 that is AC:E8:7E — 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 Bytemark Computer Consulting Ltd located?

Bytemark Computer Consulting Ltd is listed at Unit 2 Opus Avenue York YO26 6BL GB in the IEEE OUI registry entry for AC:E8:7E. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Bytemark Computer Consulting Ltd

MAC address prefix AC:E8:7E is registered to Bytemark Computer Consulting Ltd in the IEEE OUI registry. Any device whose MAC address begins with AC:E8:7E has a network interface built by Bytemark Computer Consulting 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 AC:E8:7E:00:00:00 to AC:E8:7E:FF:FF:FF.

OUI prefix: AC:E8:7E
Hyphen form: AC-E8-7E
MAC range: AC:E8:7E:00:00:00 – AC:E8:7E:FF:FF:FF
Addresses in block: 16,777,216
Organization: Bytemark Computer Consulting Ltd
Address: Unit 2 Opus Avenue York YO26 6BL GB
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 "Bytemark Computer Consulting Ltd"
archived source →
2026-07-17Assigned to "Bytemark Computer Consulting Ltd"

Nearby in the registry

The prefixes assigned immediately before and after AC:E8:7E:

FAQ

Which company owns MAC address prefix AC:E8:7E?: MAC address prefix AC:E8:7E is registered to Bytemark Computer Consulting Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:E8:7E has a network interface built by Bytemark Computer Consulting Ltd.
What is the OUI AC:E8:7E?: AC:E8:7E is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Bytemark Computer Consulting Ltd. It covers every address from AC:E8:7E:00:00:00 to AC:E8:7E:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-E8-7E.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:E8:7E:00:00:00 that is AC:E8:7E — 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 Bytemark Computer Consulting Ltd located?: Bytemark Computer Consulting Ltd is listed at Unit 2 Opus Avenue York YO26 6BL GB in the IEEE OUI registry entry for AC:E8:7E. This is the address the organization registered with the IEEE, which may differ from its current operating address.