MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix20:B3:7F:B0:00:00 /28
Vendor address2nd Floor East, Workshop 3A, No. 268 Baoshi East Road, Shiyan Sub-district, Bao'an District, Shenzhen Shenzhen Guangdong CN 518108
Country🇨🇳 China
RegisteredMar 10, 2026
Block range20:B3:7F:B0:00:00– 20:B3:7F:BF: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 →
Ownership timeline
- Mar 10, 2026 – Mar 27, 2026 B810 SPA name changedaddress changedcountry changed
- Mar 27, 2026 – present Shenzhen Hengbang Xinchuang Technology Co.,Ltd
Example addresses in this block
Where this block sits
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20:B3:7F:A0:00:00 /28
ShenZhen C&D Electronics CO.Ltd.
Next
20:B3:7F:C0:00:00 /28
EGSTON Power Electronics GmbH
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shenzhen Hengbang Xinchuang Technology Co.,Ltd holds 1 registered blocks in the IEEE registry, ranking #26,494 of 33,421 organizations by block count.