MAC address AC:D4:00 (Cisco Systems, Inc)

MAC address prefix AC:D4:00 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 24 September 2026, and no subsequent updates have been recorded.

Vendor & Registry Dossier

Public Allocation
Assigned Prefix
AC:D4:00
Registrant / Organization
Cisco Systems, Inc
Registry Chronology
Initial registration: 24 September 2026
Assignment Classification
MA-L

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

Registered Location

MAC Address Vendor Country United States (US) map
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/acd400 -H 'Accept: application/json'
{
  "success": true,
  "found": true,
  "macPrefix": "ACD400",
  "company": "Cisco Systems, Inc",
  "address": "80 West Tasman Drive, San Jose  CA 94568, US",
  "country": "US",
  "blockStart": "ACD400000000",
  "blockEnd": "ACD400FFFFFF",
  "blockSize": 16777215,
  "blockType": "MA-L",
  "updated": "2026-09-24",
  "isRand": false,
  "isPrivate": false
}