MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix3C:91:57:00:00:00 /24
Vendor address5F Building 2,No.56,Liuhe Road,Xihu District Hangzhou Zhejiang CN 310023
Country🇨🇳 China
RegisteredJan 29, 2011
Block range3C:91:57:00:00:00– 3C:91:57:FF:FF:FF
Address capacity16,777,216
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
- Jan 29, 2011 – Apr 27, 2016 Hangzhou Yulong Conmunication Co.,Ltd name changedaddress changed
- Apr 27, 2016 – present Yulong Computer Telecommunication Scientific (Shenzhen) Co.,Ltd
Example addresses in this block
Where this block sits
Yulong Computer Telecommunication Scientific (Shenzhen) Co.,Ltd holds 7 registered blocks in the IEEE registry, ranking #459 of 33,427 organizations by block count.
Other blocks registered to Yulong Computer Telecommunication Scientific (Shenzhen) Co.,Ltd