ChangYang Technology (Nanjing) Co., LTD
Any device whose MAC address begins with 74:27:3C has a network interface built by ChangYang Technology (Nanjing) Co., LTD. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.
- OUI prefix
- 74:27:3C
- Organization
- ChangYang Technology (Nanjing) Co., LTD
- Address
- NO.9 KaiCheng Road,QiLinTown NanJing JiangSu CN 211100
- 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 (1)
The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.
- 2026-07-17Assigned to "ChangYang Technology (Nanjing) Co., LTD"