Which company owns MAC address prefix DC:B4:AC?

MAC address prefix DC:B4:AC is registered to FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:B4:AC has a network interface built by FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD..

What is the OUI DC:B4:AC?

DC:B4:AC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD.. It covers every address from DC:B4:AC:00:00:00 to DC:B4:AC:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-B4-AC.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in DC:B4:AC:00:00:00 that is DC:B4:AC — 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 FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. located?

FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. is listed at Xin Qing Science & Technology Industrial Park,Jin An Town,Doumen ,Zhuhai,Guangdong,PRC Zhuhai Guangdong CN 519180 in the IEEE OUI registry entry for DC:B4:AC. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. own?

FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. holds 6 OUI prefixes in the IEEE registry, of which DC:B4:AC is one. A device made by FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. could carry a MAC address from any of them.

FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD.

MAC address prefix DC:B4:AC is registered to FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with DC:B4:AC has a network interface built by FLEXTRONICS MANUFACTURING(ZHUHAI)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 DC:B4:AC:00:00:00 to DC:B4:AC:FF:FF:FF.

OUI prefix: DC:B4:AC
Hyphen form: DC-B4-AC
MAC range: DC:B4:AC:00:00:00 – DC:B4:AC:FF:FF:FF
Addresses in block: 16,777,216
Organization: FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD.
Address: Xin Qing Science & Technology Industrial Park,Jin An Town,Doumen ,Zhuhai,Guangdong,PRC Zhuhai Guangdong CN 519180
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.

Other prefixes from FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD.

FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. holds 6 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

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 "FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD."
archived source →
2026-07-17Assigned to "FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after DC:B4:AC:

FAQ

Which company owns MAC address prefix DC:B4:AC?: MAC address prefix DC:B4:AC is registered to FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:B4:AC has a network interface built by FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD..
What is the OUI DC:B4:AC?: DC:B4:AC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD.. It covers every address from DC:B4:AC:00:00:00 to DC:B4:AC:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-B4-AC.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in DC:B4:AC:00:00:00 that is DC:B4:AC — 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 FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. located?: FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. is listed at Xin Qing Science & Technology Industrial Park,Jin An Town,Doumen ,Zhuhai,Guangdong,PRC Zhuhai Guangdong CN 519180 in the IEEE OUI registry entry for DC:B4:AC. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. own?: FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. holds 6 OUI prefixes in the IEEE registry, of which DC:B4:AC is one. A device made by FLEXTRONICS MANUFACTURING(ZHUHAI)CO.,LTD. could carry a MAC address from any of them.