MAC address C4:AA:43 (Cisco Systems, Inc)

MAC address prefix C4:AA:43 is registered to Cisco Systems, Inc, located at 80 West Tasman Drive, San Jose CA 94568, US. This registration is classified as MA-L (MAC Address Block Large) containing 16,777,216 MAC addresses (2^24). The prefix was registered on 22 May 2026, and no subsequent updates have been recorded.

Vendor & Registry Dossier

Public Allocation

Assigned Prefix

C4:AA:43

Registrant / Organization

Cisco Systems, Inc

Registry Chronology

Initial registration: 22 May 2026

Assignment Classification

MA-L

(MAC Address Block Large) containing 16,777,216 MAC addresses (2^24)

Registered Location

Country: United States (US)

Headquarters Registered Facility 🇺🇸 US

80 West Tasman Drive
San Jose CA 94568
US.

REST API v2

200 OK

CLI curl -s https://api.maclookup.app/v2/macs/c4aa43 -H 'Accept: application/json'

{
  "success": true,
  "found": true,
  "macPrefix": "C4AA43",
  "company": "Cisco Systems, Inc",
  "address": "80 West Tasman Drive, San Jose CA 94568, US",
  "country": "US",
  "blockStart": "C4AA43000000",
  "blockEnd": "C4AA43FFFFFF",
  "blockSize": 16777215,
  "blockType": "MA-L",
  "updated": "2026-05-22",
  "isRand": false,
  "isPrivate": false
}