Who owns MAC prefix 70B3D5B55?

70B3D5B55 is registered to CTAG - ESG36871424 in the IEEE MA-S registry.

What devices use 70B3D5B55?

Any network device with a MAC address starting 70:B3:D5:B5:5 was manufactured by or for CTAG - ESG36871424.

MA-S · OUI prefix

CTAG - ESG36871424

Any MAC address starting 70:B3:D5:B5:5 is registered to CTAG - ESG36871424 in ES.

OUI prefix	70B3D5B55
Vendor	CTAG - ESG36871424
Registry	MA-S (36-bit, small block)
Country	ES
Example MAC	70:B3:D5:B5:5:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D5B55 to CTAG - ESG36871424. 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:B5:5, it is CTAG - ESG36871424 hardware.

Look up another MAC