Which company owns MAC address prefix 48:DC:9D?

MAC address prefix 48:DC:9D is registered to Grandprint(Beijing) Technology Co., LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 48:DC:9D has a network interface built by Grandprint(Beijing) Technology Co., LTD..

What is the OUI 48:DC:9D?

48:DC:9D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Grandprint(Beijing) Technology Co., LTD.. It covers every address from 48:DC:9D:00:00:00 to 48:DC:9D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 48-DC-9D.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 48:DC:9D:00:00:00 that is 48:DC:9D — 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 Grandprint(Beijing) Technology Co., LTD. located?

Grandprint(Beijing) Technology Co., LTD. is listed at Room 259, 2 / F, Building 5, 8 Dongbeiwang West Road, Haidian District, Beijing CN 100089 in the IEEE OUI registry entry for 48:DC:9D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Grandprint(Beijing) Technology Co., LTD.

MAC address prefix 48:DC:9D is registered to Grandprint(Beijing) Technology Co., LTD. in the IEEE OUI registry. Any device whose MAC address begins with 48:DC:9D has a network interface built by Grandprint(Beijing) Technology 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 48:DC:9D:00:00:00 to 48:DC:9D:FF:FF:FF.

OUI prefix: 48:DC:9D
Hyphen form: 48-DC-9D
MAC range: 48:DC:9D:00:00:00 – 48:DC:9D:FF:FF:FF
Addresses in block: 16,777,216
Organization: Grandprint(Beijing) Technology Co., LTD.
Address: Room 259, 2 / F, Building 5, 8 Dongbeiwang West Road, Haidian District, Beijing CN 100089
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 "Grandprint(Beijing) Technology Co., LTD."
archived source →
2026-07-17Assigned to "Grandprint(Beijing) Technology Co., LTD."

Nearby in the registry

The prefixes assigned immediately before and after 48:DC:9D:

FAQ

Which company owns MAC address prefix 48:DC:9D?: MAC address prefix 48:DC:9D is registered to Grandprint(Beijing) Technology Co., LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 48:DC:9D has a network interface built by Grandprint(Beijing) Technology Co., LTD..
What is the OUI 48:DC:9D?: 48:DC:9D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Grandprint(Beijing) Technology Co., LTD.. It covers every address from 48:DC:9D:00:00:00 to 48:DC:9D:FF:FF:FF, or 16,777,216 addresses in total. It is also written 48-DC-9D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 48:DC:9D:00:00:00 that is 48:DC:9D — 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 Grandprint(Beijing) Technology Co., LTD. located?: Grandprint(Beijing) Technology Co., LTD. is listed at Room 259, 2 / F, Building 5, 8 Dongbeiwang West Road, Haidian District, Beijing CN 100089 in the IEEE OUI registry entry for 48:DC:9D. This is the address the organization registered with the IEEE, which may differ from its current operating address.