MAC Address Lookup

Cisco Systems, Inc A0:CF:5B

A0:CF:5B is a 24-bit MA-L MAC address block registered to Cisco Systems, Inc in US.

Vendor

Cisco Systems, Inc

MA-L · 24-bit
A0:CF:5B

Unicast · Universally administered (U/L bit clear)

Matched prefix
A0:CF:5B
Match
MA-L assignment
Address range
A0:CF:5B:00:00:00 – A0:CF:5B:FF:FF:FF
Addresses in block
16,777,216
Country
US
Organization address
80 West Tasman Drive San Jose CA US 94568
First registered
Jun 30, 2011

Formats

  • Plain hex A0CF5B
  • Colon-separated A0:CF:5B
  • Hyphen-separated A0-CF-5B
  • Cisco dot notation A0CF.5B

Prefix lineage

This prefix has changed hands. Dates are when each change was first observed in public registration data (runZero mac-tracker).

  1. Cisco Systems Jun 30, 2011
  2. CISCO SYSTEMS, INC. Jan 30, 2013
  3. Cisco Systems Jan 31, 2013
  4. CISCO SYSTEMS, INC. Feb 14, 2013