IAB: an Individual Address Block, a /36 covering 4,096 addresses. IEEE's predecessor to MA-S; no longer issued, but existing assignments remain valid.
Prefix40:D8:55:00:20:00 /36
Vendor address7th Floor,No51,Huanxing Road,Bingjiang Hangzhou Zhejiang CN 310052
Country🇨🇳 China
RegisteredSep 23, 2012
Block range40:D8:55:00:20:00– 40:D8:55:00:2F:FF
Address capacity4,096
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
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Hangzhou Chenxiao Technologies Co. Ltd. holds 1 registered blocks in the IEEE registry, ranking #14,390 of 33,427 organizations by block count.