MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix70:B3:D5:4D:40:00 /36
Vendor addressFens Pool Ave Brierley Hill West Midlands GB DY5 1QA
Country🇬🇧 United Kingdom
RegisteredNov 19, 2017
Block range70:B3:D5:4D:40:00– 70:B3:D5:4D:4F: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:D5:4D:30:00 /36
Hefei STAROT Technology Co.,Ltd
Next
70:B3:D5:4D:50:00 /36
Moog Rekofa GmbH
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Nortek Global HVAC holds 1 registered blocks in the IEEE registry, ranking #21,557 of 33,427 organizations by block count.