MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixB4:DF:43:30:00:00 /28
Vendor address2nd & 3rd Floor of No.3 Building, No.1418-50 Moganshan Road, Hangzhou, China Hangzhou CN 310000
Country🇨🇳 China
RegisteredJul 29, 2026
Block rangeB4:DF:43:30:00:00– B4:DF:43:3F: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
Where this block sits
Previous
B4:DF:43:20:00:00 /28
Wenzel Associates
Next
B4:DF:43:40:00:00 /28
Shenzhen Huizhen Fishery Co., Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Hangzhou Huasu Technology CO., LTD. holds 2 registered blocks in the IEEE registry, ranking #2,154 of 33,427 organizations by block count.
Other blocks registered to Hangzhou Huasu Technology CO., LTD.