WebAug 16, 2018 · CN. Assignment Type MA-L. Mac Address Block Large (previously named OUI). Number of address 2^24 (~16 Million) Last updated: 16 August 2018. Initial registration: 28 January 2018. Vendor/Company: Espressif Inc., MAC prefix/OUI: 84:F3:EB, address: Room 204, Building 2, 690 Bibo Rd, Pudong New Area, Shanghai Shanghai …