Shenzhen Heguang Measurement & Control Technology Co.,Ltd
MAC address prefix 30:B3:A2 is registered to Shenzhen Heguang Measurement & Control Technology Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with 30:B3:A2 has a network interface built by Shenzhen Heguang Measurement & Control 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 30:B3:A2:00:00:00 to 30:B3:A2:FF:FF:FF.
- OUI prefix
- 30:B3:A2
- Hyphen form
- 30-B3-A2
- MAC range
- 30:B3:A2:00:00:00 – 30:B3:A2:FF:FF:FF
- Addresses in block
- 16,777,216
- Organization
- Shenzhen Heguang Measurement & Control Technology Co.,Ltd
- Address
- 3/F, Tower A, Xiangnian Plaza, 6060 Qiaoxiang Road, Shenzhen Guangdong CN 518053
- 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.
- 2016-07-29Assigned to "Shenzhen Heguang Measurement & Control Technology Co.,Ltd"archived source →
- 2026-07-17Assigned to "Shenzhen Heguang Measurement & Control Technology Co.,Ltd"
Nearby in the registry
The prefixes assigned immediately before and after 30:B3:A2:
- Power Electronics International Inc.30:B1:64
- Arcadyan Corporation30:B1:B5
- Hitachi Energy Germany AG30:B2:16
- GD Midea Air-Conditioning Equipment Co.,Ltd.30:B2:37
- EVIDENT CORPORATION30:B2:9F
- CJSC NORSI-TRANS30:B3:46
- TP-LINK TECHNOLOGIES CO.,LTD.30:B4:9E
- LG Electronics30:B4:B8
- TP-LINK TECHNOLOGIES CO.,LTD.30:B5:C2
- Aitexin Technology Co., Ltd30:B5:F1
- Mojo Networks, Inc.30:B6:2D
- Juniper Networks30:B6:4F
FAQ
- Which company owns MAC address prefix 30:B3:A2?
- MAC address prefix 30:B3:A2 is registered to Shenzhen Heguang Measurement & Control Technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 30:B3:A2 has a network interface built by Shenzhen Heguang Measurement & Control Technology Co.,Ltd.
- What is the OUI 30:B3:A2?
- 30:B3:A2 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shenzhen Heguang Measurement & Control Technology Co.,Ltd. It covers every address from 30:B3:A2:00:00:00 to 30:B3:A2:FF:FF:FF, or 16,777,216 addresses in total. It is also written 30-B3-A2.
- How do I find the manufacturer of a MAC address?
- Take the first three octets of the address — in 30:B3:A2:00:00:00 that is 30:B3:A2 — 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 Shenzhen Heguang Measurement & Control Technology Co.,Ltd located?
- Shenzhen Heguang Measurement & Control Technology Co.,Ltd is listed at 3/F, Tower A, Xiangnian Plaza, 6060 Qiaoxiang Road, Shenzhen Guangdong CN 518053 in the IEEE OUI registry entry for 30:B3:A2. This is the address the organization registered with the IEEE, which may differ from its current operating address.