Which company owns MAC address prefix 48:68:34?

MAC address prefix 48:68:34 is registered to Silicon Motion, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 48:68:34 has a network interface built by Silicon Motion, Inc..

What is the OUI 48:68:34?

48:68:34 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Silicon Motion, Inc.. It covers every address from 48:68:34:00:00:00 to 48:68:34:FF:FF:FF, or 16,777,216 addresses in total. It is also written 48-68-34.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 48:68:34:00:00:00 that is 48:68:34 — 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 Silicon Motion, Inc. located?

Silicon Motion, Inc. is listed at 8F, No. 36, Taiyuan St. Zhubei City Hsinchu County TW 30265 in the IEEE OUI registry entry for 48:68:34. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Silicon Motion, Inc.

MAC address prefix 48:68:34 is registered to Silicon Motion, Inc. in the IEEE OUI registry. Any device whose MAC address begins with 48:68:34 has a network interface built by Silicon Motion, Inc.. 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 48:68:34:00:00:00 to 48:68:34:FF:FF:FF.

OUI prefix: 48:68:34
Hyphen form: 48-68-34
MAC range: 48:68:34:00:00:00 – 48:68:34:FF:FF:FF
Addresses in block: 16,777,216
Organization: Silicon Motion, Inc.
Address: 8F, No. 36, Taiyuan St. Zhubei City Hsinchu County TW 30265
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.

2018-12-21Assigned to "Silicon Motion, Inc."
archived source →
2026-07-17Assigned to "Silicon Motion, Inc."

Nearby in the registry

The prefixes assigned immediately before and after 48:68:34:

FAQ

Which company owns MAC address prefix 48:68:34?: MAC address prefix 48:68:34 is registered to Silicon Motion, Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 48:68:34 has a network interface built by Silicon Motion, Inc..
What is the OUI 48:68:34?: 48:68:34 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Silicon Motion, Inc.. It covers every address from 48:68:34:00:00:00 to 48:68:34:FF:FF:FF, or 16,777,216 addresses in total. It is also written 48-68-34.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 48:68:34:00:00:00 that is 48:68:34 — 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 Silicon Motion, Inc. located?: Silicon Motion, Inc. is listed at 8F, No. 36, Taiyuan St. Zhubei City Hsinchu County TW 30265 in the IEEE OUI registry entry for 48:68:34. This is the address the organization registered with the IEEE, which may differ from its current operating address.