Which company owns MAC address prefix C8:C8:73?

MAC address prefix C8:C8:73 is registered to CHIPSEN INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C8:C8:73 has a network interface built by CHIPSEN INC..

What is the OUI C8:C8:73?

C8:C8:73 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CHIPSEN INC.. It covers every address from C8:C8:73:00:00:00 to C8:C8:73:FF:FF:FF, or 16,777,216 addresses in total. It is also written C8-C8-73.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C8:C8:73:00:00:00 that is C8:C8:73 — 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 CHIPSEN INC. located?

CHIPSEN INC. is listed at 501, Gwangmyeong M-cluster 17, Deogan-ro 104beon-gil Gwangmyeong-si Gyeonggi-do KR 14353 in the IEEE OUI registry entry for C8:C8:73. This is the address the organization registered with the IEEE, which may differ from its current operating address.

CHIPSEN INC.

MAC address prefix C8:C8:73 is registered to CHIPSEN INC. in the IEEE OUI registry. Any device whose MAC address begins with C8:C8:73 has a network interface built by CHIPSEN 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 C8:C8:73:00:00:00 to C8:C8:73:FF:FF:FF.

OUI prefix: C8:C8:73
Hyphen form: C8-C8-73
MAC range: C8:C8:73:00:00:00 – C8:C8:73:FF:FF:FF
Addresses in block: 16,777,216
Organization: CHIPSEN INC.
Address: 501, Gwangmyeong M-cluster 17, Deogan-ro 104beon-gil Gwangmyeong-si Gyeonggi-do KR 14353
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.

2026-06-20Assigned to "CHIPSEN INC."
archived source →
2026-07-17Assigned to "CHIPSEN INC."

Nearby in the registry

The prefixes assigned immediately before and after C8:C8:73:

FAQ

Which company owns MAC address prefix C8:C8:73?: MAC address prefix C8:C8:73 is registered to CHIPSEN INC. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C8:C8:73 has a network interface built by CHIPSEN INC..
What is the OUI C8:C8:73?: C8:C8:73 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to CHIPSEN INC.. It covers every address from C8:C8:73:00:00:00 to C8:C8:73:FF:FF:FF, or 16,777,216 addresses in total. It is also written C8-C8-73.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C8:C8:73:00:00:00 that is C8:C8:73 — 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 CHIPSEN INC. located?: CHIPSEN INC. is listed at 501, Gwangmyeong M-cluster 17, Deogan-ro 104beon-gil Gwangmyeong-si Gyeonggi-do KR 14353 in the IEEE OUI registry entry for C8:C8:73. This is the address the organization registered with the IEEE, which may differ from its current operating address.