macadress

European Synchrotron Radiation Facility

MA-S
MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix70:B3:D5:16:00:00 /36
Vendor address71, avenue des Martyrs Grenoble Isère FR 38000
Country🇫🇷  France
RegisteredJan 1, 2020
Block range70:B3:D5:16:00:00– 70:B3:D5:16:0F:FF
Address capacity4,096
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 1, 2020 – Jan 16, 2021 Beijing radacat Co.,Ltd. name changedaddress changedcountry changed
  2. Jan 16, 2021 – present European Synchrotron Radiation Facility

Example addresses in this block

70:B3:D5:16:00:00 70:B3:D5:16:07:FF 70:B3:D5:16:0F:FF

Where this block sits

Previous 70:B3:D5:15:F0:00 /36 SAVRONİK ELEKTRONİK Next 70:B3:D5:16:10:00 /36 MB connect line GmbH Fernwartungssysteme

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

European Synchrotron Radiation Facility holds 1 registered blocks in the IEEE registry, ranking #12,220 of 33,427 organizations by block count.