SFR

MA-L

MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.

PrefixE4:5D:51:00:00:00 /24

Vendor address12 rue jean-philippe Rameau CS 80001 La plaine saint denis FRANCE FR 93634

RegisteredNov 5, 2016

Block rangeE4:5D:51:00:00:00– E4:5D:51: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

E4:5D:51:00:00:00 E4:5D:51:7F:FF:FF E4:5D:51:FF:FF:FF

Where this block sits

Next E4:5D:52:00:00:00 /24 Avaya Inc

The nearest registered blocks of the same size on either side of this one in IEEE's address space.

SFR holds 12 registered blocks in the IEEE registry, ranking #263 of 33,427 organizations by block count.

Other blocks registered to SFR

00:17:33:00:00:00 /24 MA-L 00:1D:16:00:00:00 /24 MA-L 00:25:15:00:00:00 /24 MA-L 24:95:04:00:00:00 /24 MA-L 30:7E:CB:00:00:00 /24 MA-L 44:CE:7D:00:00:00 /24 MA-L 60:35:C0:00:00:00 /24 MA-L 6C:61:F4:00:00:00 /24 MA-L 8C:94:CC:00:00:00 /24 MA-L CC:2D:1B:00:00:00 /24 MA-L E0:A1:D7:00:00:00 /24 MA-L