Hefei EA Excelsior Information Security Co., Ltd.

MA-M

MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.

PrefixDC:36:43:90:00:00 /28

Vendor address1F, Block A, Tsinghua Unis Infoport, Langshan Rd, Hi-Tech Industrial (North), Nanshan Shenzhen Guangdong CN 518000

Country🇨🇳 China

RegisteredDec 1, 2021

Block rangeDC:36:43:90:00:00– DC:36:43:9F: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

DC:36:43:90:00:00 DC:36:43:97:FF:FF DC:36:43:9F:FF:FF

Where this block sits

Previous DC:36:43:80:00:00 /28 OAK INFORMATION SYSTEM CO. Next DC:36:43:A0:00:00 /28 KUANTECH (CAMBODIA) CORPORATION LIMITED

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

Hefei EA Excelsior Information Security Co., Ltd. holds 1 registered blocks in the IEEE registry, ranking #14,680 of 33,427 organizations by block count.