Which company owns MAC address prefix AC:EE:70?

MAC address prefix AC:EE:70 is registered to Fontem Ventures BV in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:EE:70 has a network interface built by Fontem Ventures BV.

What is the OUI AC:EE:70?

AC:EE:70 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Fontem Ventures BV. It covers every address from AC:EE:70:00:00:00 to AC:EE:70:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-EE-70.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:EE:70:00:00:00 that is AC:EE:70 — 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 Fontem Ventures BV located?

Fontem Ventures BV is listed at Motion Building 8F, Radarweg 60 Amsterdam Noord-Holland NL 1043NT in the IEEE OUI registry entry for AC:EE:70. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Fontem Ventures BV

MAC address prefix AC:EE:70 is registered to Fontem Ventures BV in the IEEE OUI registry. Any device whose MAC address begins with AC:EE:70 has a network interface built by Fontem Ventures BV. 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:EE:70:00:00:00 to AC:EE:70:FF:FF:FF.

OUI prefix: AC:EE:70
Hyphen form: AC-EE-70
MAC range: AC:EE:70:00:00:00 – AC:EE:70:FF:FF:FF
Addresses in block: 16,777,216
Organization: Fontem Ventures BV
Address: Motion Building 8F, Radarweg 60 Amsterdam Noord-Holland NL 1043NT
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.

2018-12-21Assigned to "Fontem Ventures BV"
archived source →
2026-07-17Assigned to "Fontem Ventures BV"

Nearby in the registry

The prefixes assigned immediately before and after AC:EE:70:

FAQ

Which company owns MAC address prefix AC:EE:70?: MAC address prefix AC:EE:70 is registered to Fontem Ventures BV in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:EE:70 has a network interface built by Fontem Ventures BV.
What is the OUI AC:EE:70?: AC:EE:70 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Fontem Ventures BV. It covers every address from AC:EE:70:00:00:00 to AC:EE:70:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-EE-70.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:EE:70:00:00:00 that is AC:EE:70 — 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 Fontem Ventures BV located?: Fontem Ventures BV is listed at Motion Building 8F, Radarweg 60 Amsterdam Noord-Holland NL 1043NT in the IEEE OUI registry entry for AC:EE:70. This is the address the organization registered with the IEEE, which may differ from its current operating address.