Which company owns MAC address prefix B0:38:50?

MAC address prefix B0:38:50 is registered to Nanjing CAS-ZDC IOT SYSTEM CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:38:50 has a network interface built by Nanjing CAS-ZDC IOT SYSTEM CO.,LTD.

What is the OUI B0:38:50?

B0:38:50 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Nanjing CAS-ZDC IOT SYSTEM CO.,LTD. It covers every address from B0:38:50:00:00:00 to B0:38:50:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-38-50.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B0:38:50:00:00:00 that is B0:38:50 — 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 Nanjing CAS-ZDC IOT SYSTEM CO.,LTD located?

Nanjing CAS-ZDC IOT SYSTEM CO.,LTD is listed at 699-27 Xuanwu Avenue Nanjing Jiangsu CN 210000 in the IEEE OUI registry entry for B0:38:50. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Nanjing CAS-ZDC IOT SYSTEM CO.,LTD

MAC address prefix B0:38:50 is registered to Nanjing CAS-ZDC IOT SYSTEM CO.,LTD in the IEEE OUI registry. Any device whose MAC address begins with B0:38:50 has a network interface built by Nanjing CAS-ZDC IOT SYSTEM 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 B0:38:50:00:00:00 to B0:38:50:FF:FF:FF.

OUI prefix: B0:38:50
Hyphen form: B0-38-50
MAC range: B0:38:50:00:00:00 – B0:38:50:FF:FF:FF
Addresses in block: 16,777,216
Organization: Nanjing CAS-ZDC IOT SYSTEM CO.,LTD
Address: 699-27 Xuanwu Avenue Nanjing Jiangsu CN 210000
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 "Nanjing CAS-ZDC IOT SYSTEM CO.,LTD"
archived source →
2026-07-17Assigned to "Nanjing CAS-ZDC IOT SYSTEM CO.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after B0:38:50:

FAQ

Which company owns MAC address prefix B0:38:50?: MAC address prefix B0:38:50 is registered to Nanjing CAS-ZDC IOT SYSTEM CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B0:38:50 has a network interface built by Nanjing CAS-ZDC IOT SYSTEM CO.,LTD.
What is the OUI B0:38:50?: B0:38:50 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Nanjing CAS-ZDC IOT SYSTEM CO.,LTD. It covers every address from B0:38:50:00:00:00 to B0:38:50:FF:FF:FF, or 16,777,216 addresses in total. It is also written B0-38-50.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B0:38:50:00:00:00 that is B0:38:50 — 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 Nanjing CAS-ZDC IOT SYSTEM CO.,LTD located?: Nanjing CAS-ZDC IOT SYSTEM CO.,LTD is listed at 699-27 Xuanwu Avenue Nanjing Jiangsu CN 210000 in the IEEE OUI registry entry for B0:38:50. This is the address the organization registered with the IEEE, which may differ from its current operating address.