MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix44:99:5B:00:00:00 /24
Vendor address595, SECTOR-8, IMT MANESAR GURGAON Haryana IN 122051
Country🇮🇳 India
RegisteredMay 14, 2026
Block range44:99:5B:00:00:00– 44:99:5B: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
Where this block sits
GX India Pvt Ltd holds 3 registered blocks in the IEEE registry, ranking #1,077 of 33,427 organizations by block count.
Other blocks registered to GX India Pvt Ltd