MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix18:EF:C0:00:00:00 /24
Vendor address8F, 3-1, YuanQu St., NanKang, Taipei 115, Taiwan Taipei TW 115
Country🇹🇼 Taiwan
RegisteredJan 27, 2024
Block range18:EF:C0:00:00:00– 18:EF:C0: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
Sercomm Japan Corporation holds 4 registered blocks in the IEEE registry, ranking #821 of 33,427 organizations by block count.
Other blocks registered to Sercomm Japan Corporation