Guangzhou Shiyuan Electronic Technology Company Limited
MAC address prefix B4:AD:A3 is registered to Guangzhou Shiyuan Electronic Technology Company Limited in the IEEE OUI registry. Any device whose MAC address begins with B4:AD:A3 has a network interface built by Guangzhou Shiyuan Electronic Technology Company Limited. 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 B4:AD:A3:00:00:00 to B4:AD:A3:FF:FF:FF.
- OUI prefix
- B4:AD:A3
- Hyphen form
- B4-AD-A3
- MAC range
- B4:AD:A3:00:00:00 – B4:AD:A3:FF:FF:FF
- Addresses in block
- 16,777,216
- Organization
- Guangzhou Shiyuan Electronic Technology Company Limited
- Address
- No.6, 4th Yunpu Road, Yunpu industry District Guangzhou Guangdong CN 510530
- 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 Guangzhou Shiyuan Electronic Technology Company Limited
Guangzhou Shiyuan Electronic Technology Company Limited holds 4 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.
- 2020-08-05Assigned to "Guangzhou Shiyuan Electronic Technology Company Limited"archived source →
- 2026-07-17Assigned to "Guangzhou Shiyuan Electronic Technology Company Limited"
Nearby in the registry
The prefixes assigned immediately before and after B4:AD:A3:
- GHIA Technology (Shenzhen) LTDB4:A9:FE
- Ensequence, Inc.B4:AA:4D
- MtM Technology CorporationB4:AB:2C
- IEEE Registration AuthorityB4:AB:F3
- Bern University of Applied SciencesB4:AC:8C
- Texas InstrumentsB4:AC:9D
- MicrosoftB4:AE:2B
- Circle Reliance, Inc DBA Cranberry NetworksB4:AE:6F
- Apple, Inc.B4:AE:C1
- Avaya IncB4:B0:17
- TP-Link Systems IncB4:B0:24
- HUAWEI TECHNOLOGIES CO.,LTDB4:B0:55
FAQ
- Which company owns MAC address prefix B4:AD:A3?
- MAC address prefix B4:AD:A3 is registered to Guangzhou Shiyuan Electronic Technology Company Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:AD:A3 has a network interface built by Guangzhou Shiyuan Electronic Technology Company Limited.
- What is the OUI B4:AD:A3?
- B4:AD:A3 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Guangzhou Shiyuan Electronic Technology Company Limited. It covers every address from B4:AD:A3:00:00:00 to B4:AD:A3:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-AD-A3.
- How do I find the manufacturer of a MAC address?
- Take the first three octets of the address — in B4:AD:A3:00:00:00 that is B4:AD:A3 — 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 Guangzhou Shiyuan Electronic Technology Company Limited located?
- Guangzhou Shiyuan Electronic Technology Company Limited is listed at No.6, 4th Yunpu Road, Yunpu industry District Guangzhou Guangdong CN 510530 in the IEEE OUI registry entry for B4:AD:A3. This is the address the organization registered with the IEEE, which may differ from its current operating address.
- How many MAC prefixes does Guangzhou Shiyuan Electronic Technology Company Limited own?
- Guangzhou Shiyuan Electronic Technology Company Limited holds 4 OUI prefixes in the IEEE registry, of which B4:AD:A3 is one. A device made by Guangzhou Shiyuan Electronic Technology Company Limited could carry a MAC address from any of them.