Which company owns MAC address prefix A8:99:DC?

MAC address prefix A8:99:DC is registered to i-TOP DESING TECHNOLOGY CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:99:DC has a network interface built by i-TOP DESING TECHNOLOGY CO.,LTD.

What is the OUI A8:99:DC?

A8:99:DC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to i-TOP DESING TECHNOLOGY CO.,LTD. It covers every address from A8:99:DC:00:00:00 to A8:99:DC:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-99-DC.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A8:99:DC:00:00:00 that is A8:99:DC — 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 i-TOP DESING TECHNOLOGY CO.,LTD located?

i-TOP DESING TECHNOLOGY CO.,LTD is listed at 301-302,Rongchengda Building,Dabao Road, Bao an District Shenzhen CN 518101 in the IEEE OUI registry entry for A8:99:DC. This is the address the organization registered with the IEEE, which may differ from its current operating address.

i-TOP DESING TECHNOLOGY CO.,LTD

MAC address prefix A8:99:DC is registered to i-TOP DESING TECHNOLOGY CO.,LTD in the IEEE OUI registry. Any device whose MAC address begins with A8:99:DC has a network interface built by i-TOP DESING 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 A8:99:DC:00:00:00 to A8:99:DC:FF:FF:FF.

OUI prefix: A8:99:DC
Hyphen form: A8-99-DC
MAC range: A8:99:DC:00:00:00 – A8:99:DC:FF:FF:FF
Addresses in block: 16,777,216
Organization: i-TOP DESING TECHNOLOGY CO.,LTD
Address: 301-302,Rongchengda Building,Dabao Road, Bao an District Shenzhen CN 518101
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.

2020-11-28Assigned to "i-TOP DESING TECHNOLOGY CO.,LTD"
archived source →
2026-07-17Assigned to "i-TOP DESING TECHNOLOGY CO.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after A8:99:DC:

FAQ

Which company owns MAC address prefix A8:99:DC?: MAC address prefix A8:99:DC is registered to i-TOP DESING TECHNOLOGY CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:99:DC has a network interface built by i-TOP DESING TECHNOLOGY CO.,LTD.
What is the OUI A8:99:DC?: A8:99:DC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to i-TOP DESING TECHNOLOGY CO.,LTD. It covers every address from A8:99:DC:00:00:00 to A8:99:DC:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-99-DC.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A8:99:DC:00:00:00 that is A8:99:DC — 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 i-TOP DESING TECHNOLOGY CO.,LTD located?: i-TOP DESING TECHNOLOGY CO.,LTD is listed at 301-302,Rongchengda Building,Dabao Road, Bao an District Shenzhen CN 518101 in the IEEE OUI registry entry for A8:99:DC. This is the address the organization registered with the IEEE, which may differ from its current operating address.