Shenzhen Tong Tai Yi information Technology Co.,Ltd
MA-M
MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix18:9B:A5:80:00:00 /28
Vendor addressDistrict C，3rd Floor，Bldg B1,Digital Tech Park,7th GaoXin South Blvd,Tech Park,NanShan，ShenZhen，China shenzhen guangdong CN 518102
Country🇨🇳 China
Block range18:9B:A5:80:00:00– 18:9B:A5:8F:FF:FF
Address capacity1,048,576
AdministrationUniversally administered: its prefix comes from a block registered through the IEEE Registration Authority
TransmissionUnicast: addressed to a single device
SourceIEEE Registration Authority
Address capacity is the size of this registered block, not a count of devices actually manufactured or online. Registration identifies the organization holding the block, not a specific device model or unit.
Curious how a prefix like this turns into a full address? See how MAC addresses are structured →
Example addresses in this block