MAC Address Lookup

Find the vendor name of a device by entering an OUI or a MAC address

 MAC

Grossenbacher Systeme AG

Unique prefixes: 19

Block Size: 77805 (77.8 k)

www.gesys.ch

First registration: 21 February 2011

Last updated: 11 December 2020

Types

IAB: Individual Address Blocks. Number of address 2^24 (~16 Million)

MA-S: Mac Address Block Small (previously named OUI-36, encompasses IAB Assignments). Number of address 2^12 (4096)

MAC PrefixTypeRegistration Date
00:50:C2:02:9IAB2011-02-21
00:50:C2:41:0IAB2011-02-21
00:50:C2:A6:2IAB2011-02-21
00:50:C2:F1:DIAB2012-03-15
40:D8:55:0F:1IAB2013-05-16
70:B3:D5:0D:EMA-S2017-07-23
70:B3:D5:0E:8MA-S2017-01-07
70:B3:D5:29:7MA-S2016-02-18
70:B3:D5:3E:BMA-S2019-07-04
70:B3:D5:5E:2MA-S2016-11-26
70:B3:D5:5F:EMA-S2020-05-27
70:B3:D5:6B:7MA-S2018-02-15
70:B3:D5:75:8MA-S2018-06-14
70:B3:D5:80:3MA-S2018-12-16
70:B3:D5:A9:2MA-S2015-04-29
70:B3:D5:B7:5MA-S2020-01-18
70:B3:D5:BB:5MA-S2019-03-01
70:B3:D5:C9:1MA-S2016-04-24
70:B3:D5:CE:8MA-S2020-12-11