macadress

Beijing National Railway Research & Design Institute of Signal & Communication Co., Ltd.

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixC0:27:B9:00:00:00 /24
Vendor addressBuilding No.18, Huayuan YiLi,Fengtai District, Beijing CN 100073
Country🇨🇳  China
RegisteredJan 25, 2011
Block rangeC0:27:B9:00:00:00– C0:27:B9: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

  1. Jan 25, 2011 – Feb 14, 2013 Beijing National Railway Research & Design Institute of Signal & Communication name changedaddress changed
  2. Feb 14, 2013 – present Beijing National Railway Research & Design Institute of Signal & Communication Co., Ltd.

Example addresses in this block

C0:27:B9:00:00:00 C0:27:B9:7F:FF:FF C0:27:B9:FF:FF:FF

Where this block sits

Beijing National Railway Research & Design Institute of Signal & Communication Co., Ltd. holds 1 registered blocks in the IEEE registry, ranking #6,651 of 33,427 organizations by block count.