Devices with MAC addresses that start with B4-A5-EF were manufactured by Sercomm Corporation.

Device Manufacturer
Sercomm Corporation.
Manufacturer Location
3F,No.81,Yu-Yih Rd.,Chu-Nan Chen
Miao-Lih Hsuan 115
Estimated Devices using B4-A5-EF
16,256,250
Estimated Total Devices From Mfg
195,075,000
Related MAC Addresses
D4-21-22, 3C-98-72, D4-60-E3, 00-C0-02, E0-60-66, 00-0E-8F, 94-4A-0C, 74-9D-79, 78-81-02, 78-94-B4, 14-2E-5E