38:B1:4E:4 Noitom Robotics Technology (Beijing) Co.,Ltd.
Every MAC address from 38:B1:4E:40:00:00 to 38:B1:4E:4F:FF:FF belongs to a block the IEEE assigned to Noitom Robotics Technology (Beijing) Co.,Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 38:B1:4E:4 belongs to
Written 38:B1:4E:4, 38-B1-4E-4 or 38B14E4, depending on the system. Look up a full address.
Prefix
38:B1:4E:4/28
Organization
Noitom Robotics Technology (Beijing) Co.,Ltd.
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
38:B1:4E:40:00:00
Last address
38:B1:4E:4F:FF:FF
Address type
Globally unique, unicast
Registered address
601–604, 6th Floor, Building 2, NO.16, Xiaoyuehe Dongpan Road, Haidian District Beijing Beijing CN 100085
Parent block
Inside 38:B1:4E
This MA-M block is carved from the 24-bit block 38:B1:4E, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.