Which company owns MAC address prefix 38:CA:97?

MAC address prefix 38:CA:97 is registered to Contour Design LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:CA:97 has a network interface built by Contour Design LLC.

What is the OUI 38:CA:97?

38:CA:97 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Contour Design LLC. It covers every address from 38:CA:97:00:00:00 to 38:CA:97:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-CA-97.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 38:CA:97:00:00:00 that is 38:CA:97 — 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 Contour Design LLC located?

Contour Design LLC is listed at 10 Industrial Drive Windham NH US 03087 in the IEEE OUI registry entry for 38:CA:97. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Contour Design LLC

MAC address prefix 38:CA:97 is registered to Contour Design LLC in the IEEE OUI registry. Any device whose MAC address begins with 38:CA:97 has a network interface built by Contour Design LLC. 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 38:CA:97:00:00:00 to 38:CA:97:FF:FF:FF.

OUI prefix: 38:CA:97
Hyphen form: 38-CA-97
MAC range: 38:CA:97:00:00:00 – 38:CA:97:FF:FF:FF
Addresses in block: 16,777,216
Organization: Contour Design LLC
Address: 10 Industrial Drive Windham NH US 03087
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 "Contour Design LLC"
archived source →
2026-07-17Assigned to "Contour Design LLC"

Nearby in the registry

The prefixes assigned immediately before and after 38:CA:97:

FAQ

Which company owns MAC address prefix 38:CA:97?: MAC address prefix 38:CA:97 is registered to Contour Design LLC in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 38:CA:97 has a network interface built by Contour Design LLC.
What is the OUI 38:CA:97?: 38:CA:97 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Contour Design LLC. It covers every address from 38:CA:97:00:00:00 to 38:CA:97:FF:FF:FF, or 16,777,216 addresses in total. It is also written 38-CA-97.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 38:CA:97:00:00:00 that is 38:CA:97 — 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 Contour Design LLC located?: Contour Design LLC is listed at 10 Industrial Drive Windham NH US 03087 in the IEEE OUI registry entry for 38:CA:97. This is the address the organization registered with the IEEE, which may differ from its current operating address.