Which company owns MAC address prefix C4:A9:B8?

MAC address prefix C4:A9:B8 is registered to XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:A9:B8 has a network interface built by XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD.

What is the OUI C4:A9:B8?

C4:A9:B8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD. It covers every address from C4:A9:B8:00:00:00 to C4:A9:B8:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-A9-B8.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C4:A9:B8:00:00:00 that is C4:A9:B8 — 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 XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD located?

XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD is listed at 2919, East Block, One Center, Xixiang Street, Baoan District, Shenzhen Shenzhen city Guangdong Province CN 518102 in the IEEE OUI registry entry for C4:A9:B8. This is the address the organization registered with the IEEE, which may differ from its current operating address.

XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD

MAC address prefix C4:A9:B8 is registered to XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD in the IEEE OUI registry. Any device whose MAC address begins with C4:A9:B8 has a network interface built by XIAMENSHI C-CHIP 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 C4:A9:B8:00:00:00 to C4:A9:B8:FF:FF:FF.

OUI prefix: C4:A9:B8
Hyphen form: C4-A9-B8
MAC range: C4:A9:B8:00:00:00 – C4:A9:B8:FF:FF:FF
Addresses in block: 16,777,216
Organization: XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD
Address: 2919, East Block, One Center, Xixiang Street, Baoan District, Shenzhen Shenzhen city Guangdong Province CN 518102
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.

2024-08-15Assigned to "XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD"
archived source →
2026-07-17Assigned to "XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after C4:A9:B8:

FAQ

Which company owns MAC address prefix C4:A9:B8?: MAC address prefix C4:A9:B8 is registered to XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:A9:B8 has a network interface built by XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD.
What is the OUI C4:A9:B8?: C4:A9:B8 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD. It covers every address from C4:A9:B8:00:00:00 to C4:A9:B8:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-A9-B8.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C4:A9:B8:00:00:00 that is C4:A9:B8 — 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 XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD located?: XIAMENSHI C-CHIP TECHNOLOGY CO.,LTD is listed at 2919, East Block, One Center, Xixiang Street, Baoan District, Shenzhen Shenzhen city Guangdong Province CN 518102 in the IEEE OUI registry entry for C4:A9:B8. This is the address the organization registered with the IEEE, which may differ from its current operating address.