MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix78:39:2D:30:00:00 /28
Vendor addressDetection House 72-78 Morfa Road Swansea Swansea GB SA1 2EN
Country🇬🇧 United Kingdom
RegisteredNov 2, 2023
Block range78:39:2D:30:00:00– 78:39:2D:3F:FF:FF
Address capacity1,048,576
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
78:39:2D:20:00:00 /28
Chengdu Shiketong Technology Co.,Ltd
Next
78:39:2D:40:00:00 /28
Annapurna labs
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Zeta Alarms Limited holds 1 registered blocks in the IEEE registry, ranking #33,159 of 33,421 organizations by block count.