MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix8C:1F:64:45:E0:00 /36
Vendor addressBuilding 1, 5th Floor, Zone 1, Zhuantang Science and Technology Economic Block 8, Zhuantang Street, Xihu District, Hangzhou, Zhejiang, China. Hangzhou CN 310024
Country🇨🇳 China
RegisteredJul 3, 2025
Block range8C:1F:64:45:E0:00– 8C:1F:64:45:EF: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
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8C:1F:64:45:D0:00 /36
Fuzhou Tucsen Photonics Co.,Ltd
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8C:1F:64:45:F0:00 /36
Toshniwal Security Solutions Pvt Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Hangzhou Zhongchuan Digital Equipment Co., Ltd. holds 1 registered blocks in the IEEE registry, ranking #14,496 of 33,427 organizations by block count.