Which company owns MAC address prefix FC:9D:D8?

MAC address prefix FC:9D:D8 is registered to Beijing TongTongYiLian Science and Technology Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with FC:9D:D8 has a network interface built by Beijing TongTongYiLian Science and Technology Ltd..

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in FC:9D:D8:00:00:00 that is FC:9D:D8 — 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.

Beijing TongTongYiLian Science and Technology Ltd.

MAC address prefix FC:9D:D8 is registered to Beijing TongTongYiLian Science and Technology Ltd. in the IEEE OUI registry. Any device whose MAC address begins with FC:9D:D8 has a network interface built by Beijing TongTongYiLian Science and Technology 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 FC:9D:D8:00:00:00 to FC:9D:D8:FF:FF:FF.

OUI prefix: FC:9D:D8
Hyphen form: FC-9D-D8
MAC range: FC:9D:D8:00:00:00 – FC:9D:D8:FF:FF:FF
Addresses in block: 16,777,216
Organization: Beijing TongTongYiLian Science and Technology Ltd.
Address: Room 301,Zone 3,Building 9,No.8 Dongbeiwang West Road,Haidian District,Beijing BEIJING BEIJING CN 100193
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.

2017-09-08Assigned to "Beijing TongTongYiLian Science and Technology Ltd."
archived source →
2026-07-17Assigned to "Beijing TongTongYiLian Science and Technology Ltd."

Nearby in the registry

The prefixes assigned immediately before and after FC:9D:D8:

FAQ

Which company owns MAC address prefix FC:9D:D8?: MAC address prefix FC:9D:D8 is registered to Beijing TongTongYiLian Science and Technology Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with FC:9D:D8 has a network interface built by Beijing TongTongYiLian Science and Technology Ltd..
What is the OUI FC:9D:D8?: FC:9D:D8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Beijing TongTongYiLian Science and Technology Ltd.. It covers every address from FC:9D:D8:00:00:00 to FC:9D:D8:FF:FF:FF, or 16,777,216 addresses in total. It is also written FC-9D-D8.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in FC:9D:D8:00:00:00 that is FC:9D:D8 — 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 Beijing TongTongYiLian Science and Technology Ltd. located?: Beijing TongTongYiLian Science and Technology Ltd. is listed at Room 301,Zone 3,Building 9,No.8 Dongbeiwang West Road,Haidian District,Beijing BEIJING BEIJING CN 100193 in the IEEE OUI registry entry for FC:9D:D8. This is the address the organization registered with the IEEE, which may differ from its current operating address.