Which company owns MAC address prefix 20:37:BC?

MAC address prefix 20:37:BC is registered to Kuipers Electronic Engineering BV in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 20:37:BC has a network interface built by Kuipers Electronic Engineering BV.

What is the OUI 20:37:BC?

20:37:BC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Kuipers Electronic Engineering BV. It covers every address from 20:37:BC:00:00:00 to 20:37:BC:FF:FF:FF, or 16,777,216 addresses in total. It is also written 20-37-BC.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 20:37:BC:00:00:00 that is 20:37:BC — 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 Kuipers Electronic Engineering BV located?

Kuipers Electronic Engineering BV is listed at Houtkopersstraat 6 Zwijndrecht Zuid-Holland NL 3334 KD in the IEEE OUI registry entry for 20:37:BC. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Kuipers Electronic Engineering BV

MAC address prefix 20:37:BC is registered to Kuipers Electronic Engineering BV in the IEEE OUI registry. Any device whose MAC address begins with 20:37:BC has a network interface built by Kuipers Electronic Engineering 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 20:37:BC:00:00:00 to 20:37:BC:FF:FF:FF.

OUI prefix: 20:37:BC
Hyphen form: 20-37-BC
MAC range: 20:37:BC:00:00:00 – 20:37:BC:FF:FF:FF
Addresses in block: 16,777,216
Organization: Kuipers Electronic Engineering BV
Address: Houtkopersstraat 6 Zwijndrecht Zuid-Holland NL 3334 KD
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 "Kuipers Electronic Engineering BV"
archived source →
2026-07-17Assigned to "Kuipers Electronic Engineering BV"

Nearby in the registry

The prefixes assigned immediately before and after 20:37:BC:

FAQ

Which company owns MAC address prefix 20:37:BC?: MAC address prefix 20:37:BC is registered to Kuipers Electronic Engineering BV in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 20:37:BC has a network interface built by Kuipers Electronic Engineering BV.
What is the OUI 20:37:BC?: 20:37:BC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Kuipers Electronic Engineering BV. It covers every address from 20:37:BC:00:00:00 to 20:37:BC:FF:FF:FF, or 16,777,216 addresses in total. It is also written 20-37-BC.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 20:37:BC:00:00:00 that is 20:37:BC — 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 Kuipers Electronic Engineering BV located?: Kuipers Electronic Engineering BV is listed at Houtkopersstraat 6 Zwijndrecht Zuid-Holland NL 3334 KD in the IEEE OUI registry entry for 20:37:BC. This is the address the organization registered with the IEEE, which may differ from its current operating address.