Efficient Residential Heating GmbH - MAC Prefix 8C1F64DDB (MA-S)

What this means

The IEEE assigned the MA-S block 8C1F64DDB to Efficient Residential Heating GmbH. 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 8C:1F:64:DD:B, it is Efficient Residential Heating GmbH hardware.

Frequently Asked Questions

Who owns MAC prefix 8C1F64DDB?

8C1F64DDB is registered to Efficient Residential Heating GmbH 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. Efficient Residential Heating GmbH's block covers 4,096 addresses.

What devices use 8C1F64DDB?

Any network device with a MAC address starting 8C:1F:64:DD:B was manufactured by or for Efficient Residential Heating GmbH.

OUI prefix	8C1F64DDB
Vendor	Efficient Residential Heating GmbH
Registry	MA-S (36-bit, small block)
Block size	4,096 addresses
Country	DE
Other blocks by this vendor	1 total
Example MAC	8C:1F:64:DD:B:00:00:00