Which company owns MAC address prefix AC:48:2D?

MAC address prefix AC:48:2D is registered to Ralinwi Nanjing Electronic Technology Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:48:2D has a network interface built by Ralinwi Nanjing Electronic Technology Co., Ltd..

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:48:2D:00:00:00 that is AC:48:2D — 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 Ralinwi Nanjing Electronic Technology Co., Ltd. located?

Ralinwi Nanjing Electronic Technology Co., Ltd. is listed at 3rd Floor, Building B,R&D Block 3, Xuzhuang Software Park, No. 699-27, Xuanwu Avenue Nanjing Jiangsu CN 210046 in the IEEE OUI registry entry for AC:48:2D. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Ralinwi Nanjing Electronic Technology Co., Ltd.

MAC address prefix AC:48:2D is registered to Ralinwi Nanjing Electronic Technology Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with AC:48:2D has a network interface built by Ralinwi Nanjing Electronic 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 AC:48:2D:00:00:00 to AC:48:2D:FF:FF:FF.

OUI prefix: AC:48:2D
Hyphen form: AC-48-2D
MAC range: AC:48:2D:00:00:00 – AC:48:2D:FF:FF:FF
Addresses in block: 16,777,216
Organization: Ralinwi Nanjing Electronic Technology Co., Ltd.
Address: 3rd Floor, Building B,R&D Block 3, Xuzhuang Software Park, No. 699-27, Xuanwu Avenue Nanjing Jiangsu CN 210046
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 "Ralinwi Nanjing Electronic Technology Co., Ltd."
archived source →
2026-07-17Assigned to "Ralinwi Nanjing Electronic Technology Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after AC:48:2D:

FAQ

Which company owns MAC address prefix AC:48:2D?: MAC address prefix AC:48:2D is registered to Ralinwi Nanjing Electronic Technology Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:48:2D has a network interface built by Ralinwi Nanjing Electronic Technology Co., Ltd..
What is the OUI AC:48:2D?: AC:48:2D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Ralinwi Nanjing Electronic Technology Co., Ltd.. It covers every address from AC:48:2D:00:00:00 to AC:48:2D:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-48-2D.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:48:2D:00:00:00 that is AC:48:2D — 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 Ralinwi Nanjing Electronic Technology Co., Ltd. located?: Ralinwi Nanjing Electronic Technology Co., Ltd. is listed at 3rd Floor, Building B,R&D Block 3, Xuzhuang Software Park, No. 699-27, Xuanwu Avenue Nanjing Jiangsu CN 210046 in the IEEE OUI registry entry for AC:48:2D. This is the address the organization registered with the IEEE, which may differ from its current operating address.