Which company owns MAC address prefix 64:13:5A?

MAC address prefix 64:13:5A is registered to Itectra A/S in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 64:13:5A has a network interface built by Itectra A/S.

What is the OUI 64:13:5A?

64:13:5A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Itectra A/S. It covers every address from 64:13:5A:00:00:00 to 64:13:5A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 64-13-5A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 64:13:5A:00:00:00 that is 64:13:5A — 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 Itectra A/S located?

Itectra A/S is listed at Sofiendalsvej 85 Aalborg SV DK 9200 in the IEEE OUI registry entry for 64:13:5A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Itectra A/S

MAC address prefix 64:13:5A is registered to Itectra A/S in the IEEE OUI registry. Any device whose MAC address begins with 64:13:5A has a network interface built by Itectra A/S. 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 64:13:5A:00:00:00 to 64:13:5A:FF:FF:FF.

OUI prefix: 64:13:5A
Hyphen form: 64-13-5A
MAC range: 64:13:5A:00:00:00 – 64:13:5A:FF:FF:FF
Addresses in block: 16,777,216
Organization: Itectra A/S
Address: Sofiendalsvej 85 Aalborg SV DK 9200
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.

2022-07-11Assigned to "Itectra A/S"
archived source →
2026-07-17Assigned to "Itectra A/S"

Nearby in the registry

The prefixes assigned immediately before and after 64:13:5A:

FAQ

Which company owns MAC address prefix 64:13:5A?: MAC address prefix 64:13:5A is registered to Itectra A/S in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 64:13:5A has a network interface built by Itectra A/S.
What is the OUI 64:13:5A?: 64:13:5A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Itectra A/S. It covers every address from 64:13:5A:00:00:00 to 64:13:5A:FF:FF:FF, or 16,777,216 addresses in total. It is also written 64-13-5A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 64:13:5A:00:00:00 that is 64:13:5A — 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 Itectra A/S located?: Itectra A/S is listed at Sofiendalsvej 85 Aalborg SV DK 9200 in the IEEE OUI registry entry for 64:13:5A. This is the address the organization registered with the IEEE, which may differ from its current operating address.