MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix4C:E1:73:70:00:00 /28
Vendor addressUnit 17 Sandyford Office Park Dublin IE D18 NP77
Country🇮🇪 Ireland
RegisteredJul 17, 2016
Block range4C:E1:73:70:00:00– 4C:E1:73:7F: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
4C:E1:73:60:00:00 /28
DAIKOKU DENKI CO.,LTD.
Next
4C:E1:73:80:00:00 /28
Nanjing Tongke Technology Development Co., LTD
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Ersúles Limited holds 1 registered blocks in the IEEE registry, ranking #12,048 of 33,421 organizations by block count.