MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:02:81:00:00:00 /24
Vendor addressMadge House Maindenhead Berkshire GB SL6 2HP
Country🇬🇧 United Kingdom
RegisteredSep 8, 2000
Block range00:02:81:00:00:00– 00:02:81: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 →
Ownership timeline
- Sep 8, 2000 – Nov 9, 2000 Madge Networks, Ltd. name changed
- Nov 9, 2000 – Jun 5, 2002 Red-M (Communications) Ltd. name changedaddress changedcountry changed
- Jun 5, 2002 – Feb 12, 2004 Madge Networks Limited name changedaddress changed
- Feb 12, 2004 – present Madge Ltd.
Example addresses in this block
Where this block sits
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Madge Ltd. holds 4 registered blocks in the IEEE registry, ranking #771 of 33,421 organizations by block count.
Other blocks registered to Madge Ltd.