biosilver .co.,ltd - MAC Prefix 70B3D5D21 (MA-S)

What this means

The IEEE assigned the MA-S block 70B3D5D21 to biosilver .co.,ltd. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 70:B3:D5:D2:1, it is biosilver .co.,ltd hardware.

Frequently Asked Questions

Who owns MAC prefix 70B3D5D21?

70B3D5D21 is registered to biosilver .co.,ltd in the IEEE MA-S registry.

What does the MA-S registry type mean?

An MA-S assignment, formerly called OUI-36, covers 36 bits, giving the vendor 4,096 device addresses, the smallest block the IEEE issues. biosilver .co.,ltd's block covers 4,096 addresses.

What devices use 70B3D5D21?

Any network device with a MAC address starting 70:B3:D5:D2:1 was manufactured by or for biosilver .co.,ltd.

Other biosilver .co.,ltd prefixes

biosilver .co.,ltd holds 6 registered blocks in total.

OUI prefix	70B3D5D21
Vendor	biosilver .co.,ltd
Registry	MA-S (36-bit, small block)
Block size	4,096 addresses
Country	JP
Other blocks by this vendor	6 total
Example MAC	70:B3:D5:D2:1:00:00:00