Which company owns MAC address prefix 50:ED:78?

MAC address prefix 50:ED:78 is registered to Changzhou Yongse Infotech Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 50:ED:78 has a network interface built by Changzhou Yongse Infotech Co.,Ltd.

What is the OUI 50:ED:78?

50:ED:78 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Changzhou Yongse Infotech Co.,Ltd. It covers every address from 50:ED:78:00:00:00 to 50:ED:78:FF:FF:FF, or 16,777,216 addresses in total. It is also written 50-ED-78.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 50:ED:78:00:00:00 that is 50:ED:78 — 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 Changzhou Yongse Infotech Co.,Ltd located?

Changzhou Yongse Infotech Co.,Ltd is listed at No.128 Zhengzhong Rd, Xixiashua Town Changzhou Jiangsu CN 213135 in the IEEE OUI registry entry for 50:ED:78. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Changzhou Yongse Infotech Co.,Ltd

MAC address prefix 50:ED:78 is registered to Changzhou Yongse Infotech Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with 50:ED:78 has a network interface built by Changzhou Yongse Infotech 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 50:ED:78:00:00:00 to 50:ED:78:FF:FF:FF.

OUI prefix: 50:ED:78
Hyphen form: 50-ED-78
MAC range: 50:ED:78:00:00:00 – 50:ED:78:FF:FF:FF
Addresses in block: 16,777,216
Organization: Changzhou Yongse Infotech Co.,Ltd
Address: No.128 Zhengzhong Rd, Xixiashua Town Changzhou Jiangsu CN 213135
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 "Changzhou Yongse Infotech Co.,Ltd"
archived source →
2026-07-17Assigned to "Changzhou Yongse Infotech Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 50:ED:78:

FAQ

Which company owns MAC address prefix 50:ED:78?: MAC address prefix 50:ED:78 is registered to Changzhou Yongse Infotech Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 50:ED:78 has a network interface built by Changzhou Yongse Infotech Co.,Ltd.
What is the OUI 50:ED:78?: 50:ED:78 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Changzhou Yongse Infotech Co.,Ltd. It covers every address from 50:ED:78:00:00:00 to 50:ED:78:FF:FF:FF, or 16,777,216 addresses in total. It is also written 50-ED-78.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 50:ED:78:00:00:00 that is 50:ED:78 — 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 Changzhou Yongse Infotech Co.,Ltd located?: Changzhou Yongse Infotech Co.,Ltd is listed at No.128 Zhengzhong Rd, Xixiashua Town Changzhou Jiangsu CN 213135 in the IEEE OUI registry entry for 50:ED:78. This is the address the organization registered with the IEEE, which may differ from its current operating address.