Adtran Inc acquired MAC address blocks

3 blocks now registered to Adtran Inc came through 1 former-owner relationship.

MAC address or OUI prefix Look up

Current owner

Adtran Inc

Former owners

1

Blocks

3

Addresses

50.3 million

Former owners: Cambridge Communication Systems Ltd × 3

Prefix	Former owner	Block	Addresses	First observed
20:5F:3D	Cambridge Communication Systems Ltd	MA-L	16.8 million	11 May 2019
28:D0:CB	Cambridge Communication Systems Ltd	MA-L	16.8 million	25 Apr 2018
AC:51:EE	Cambridge Communication Systems Ltd	MA-L	16.8 million	2 Feb 2012

Complete as of the current IEEE registry deploy. Dates are when each registration was first observed in public data, not legal assignment dates.