Which company owns MAC address prefix 24:3C:B0?

MAC address prefix 24:3C:B0 is registered to Dongguan Mentech Optical & Magnetic Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 24:3C:B0 has a network interface built by Dongguan Mentech Optical & Magnetic Co., Ltd..

What is the OUI 24:3C:B0?

24:3C:B0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Dongguan Mentech Optical & Magnetic Co., Ltd.. It covers every address from 24:3C:B0:00:00:00 to 24:3C:B0:FF:FF:FF, or 16,777,216 addresses in total. It is also written 24-3C-B0.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 24:3C:B0:00:00:00 that is 24:3C:B0 — 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 Dongguan Mentech Optical & Magnetic Co., Ltd. located?

Dongguan Mentech Optical & Magnetic Co., Ltd. is listed at Building A, No. 157 Dongyuan Avenue, Shipai Town, Dongguan City, Guangdong Province Dongguan CN 523000 in the IEEE OUI registry entry for 24:3C:B0. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Dongguan Mentech Optical & Magnetic Co., Ltd.

MAC address prefix 24:3C:B0 is registered to Dongguan Mentech Optical & Magnetic Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 24:3C:B0 has a network interface built by Dongguan Mentech Optical & Magnetic Co., 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 24:3C:B0:00:00:00 to 24:3C:B0:FF:FF:FF.

OUI prefix: 24:3C:B0
Hyphen form: 24-3C-B0
MAC range: 24:3C:B0:00:00:00 – 24:3C:B0:FF:FF:FF
Addresses in block: 16,777,216
Organization: Dongguan Mentech Optical & Magnetic Co., Ltd.
Address: Building A, No. 157 Dongyuan Avenue, Shipai Town, Dongguan City, Guangdong Province Dongguan CN 523000
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.

2024-09-17Assigned to "Dongguan Mentech Optical & Magnetic Co., Ltd."
archived source →
2026-07-17Assigned to "Dongguan Mentech Optical & Magnetic Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 24:3C:B0:

FAQ

Which company owns MAC address prefix 24:3C:B0?: MAC address prefix 24:3C:B0 is registered to Dongguan Mentech Optical & Magnetic Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 24:3C:B0 has a network interface built by Dongguan Mentech Optical & Magnetic Co., Ltd..
What is the OUI 24:3C:B0?: 24:3C:B0 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Dongguan Mentech Optical & Magnetic Co., Ltd.. It covers every address from 24:3C:B0:00:00:00 to 24:3C:B0:FF:FF:FF, or 16,777,216 addresses in total. It is also written 24-3C-B0.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 24:3C:B0:00:00:00 that is 24:3C:B0 — 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 Dongguan Mentech Optical & Magnetic Co., Ltd. located?: Dongguan Mentech Optical & Magnetic Co., Ltd. is listed at Building A, No. 157 Dongyuan Avenue, Shipai Town, Dongguan City, Guangdong Province Dongguan CN 523000 in the IEEE OUI registry entry for 24:3C:B0. This is the address the organization registered with the IEEE, which may differ from its current operating address.