MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:19:86:00:00:00 /24
Vendor addressRm.2305B.Sege Plaza,Huaqiang North Rd., Shenzhen Guangdong US 518057
Country🇺🇸 United States
RegisteredSep 3, 2006
Block range00:19:86:00:00:00– 00:19:86: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 →
Example addresses in this block
Where this block sits
Previous
00:19:85:00:00:00 /24
IT Watchdogs, Inc
Next
00:19:87:00:00:00 /24
Panasonic Mobile Communications Co.,Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Cheng Hongjian holds 1 registered blocks in the IEEE registry, ranking #8,229 of 33,427 organizations by block count.