Which company owns MAC address prefix 30:CB:36?

MAC address prefix 30:CB:36 is registered to Belden Singapore Pte. Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:CB:36 has a network interface built by Belden Singapore Pte. Ltd..

What is the OUI 30:CB:36?

30:CB:36 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Belden Singapore Pte. Ltd.. It covers every address from 30:CB:36:00:00:00 to 30:CB:36:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-CB-36.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 30:CB:36:00:00:00 that is 30:CB:36 — 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 Belden Singapore Pte. Ltd. located?

Belden Singapore Pte. Ltd. is listed at 151 Lorong Chuan #05-01 New Tech Park Singapore Singapore SG 556741 in the IEEE OUI registry entry for 30:CB:36. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Belden Singapore Pte. Ltd.

MAC address prefix 30:CB:36 is registered to Belden Singapore Pte. Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 30:CB:36 has a network interface built by Belden Singapore Pte. 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 30:CB:36:00:00:00 to 30:CB:36:FF:FF:FF.

OUI prefix: 30:CB:36
Hyphen form: 30-CB-36
MAC range: 30:CB:36:00:00:00 – 30:CB:36:FF:FF:FF
Addresses in block: 16,777,216
Organization: Belden Singapore Pte. Ltd.
Address: 151 Lorong Chuan #05-01 New Tech Park Singapore Singapore SG 556741
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 "Belden Singapore Pte. Ltd."
archived source →
2026-07-17Assigned to "Belden Singapore Pte. Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 30:CB:36:

FAQ

Which company owns MAC address prefix 30:CB:36?: MAC address prefix 30:CB:36 is registered to Belden Singapore Pte. Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:CB:36 has a network interface built by Belden Singapore Pte. Ltd..
What is the OUI 30:CB:36?: 30:CB:36 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Belden Singapore Pte. Ltd.. It covers every address from 30:CB:36:00:00:00 to 30:CB:36:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-CB-36.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 30:CB:36:00:00:00 that is 30:CB:36 — 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 Belden Singapore Pte. Ltd. located?: Belden Singapore Pte. Ltd. is listed at 151 Lorong Chuan #05-01 New Tech Park Singapore Singapore SG 556741 in the IEEE OUI registry entry for 30:CB:36. This is the address the organization registered with the IEEE, which may differ from its current operating address.