MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix70:B3:D5:89:70:00 /36
Vendor addressNa Jarově 4 Praha 3 Czech republic CZ 13000
Country🇨🇿 Czechia
RegisteredAug 6, 2017
Block range70:B3:D5:89:70:00– 70:B3:D5:89:7F: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
Previous
70:B3:D5:89:60:00 /36
Shanghai Longpal Communication Equipment Co., Ltd.
Next
70:B3:D5:89:80:00 /36
Salupo Sas
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
EFG CZ spol. s r.o. holds 2 registered blocks in the IEEE registry, ranking #1,931 of 33,421 organizations by block count.
Other blocks registered to EFG CZ spol. s r.o.