MAC address A4:EF:0C (Mellanox Technologies, Inc.)

MAC address prefix A4:EF:0C is registered to Mellanox Technologies, Inc., located at 350 Oakmead Parkway, Suite 100, Sunnyvale CA 94085, 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 03 September 2026, and no subsequent updates have been recorded.

Vendor & Registry Dossier

Public Allocation
Assigned Prefix
A4:EF:0C
Registrant / Organization
Mellanox Technologies, Inc.
Registry Chronology
Initial registration: 03 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
350 Oakmead Parkway
Suite 100
Sunnyvale CA 94085
US.

REST API v2

200 OK
CLI curl -s https://api.maclookup.app/v2/macs/a4ef0c -H 'Accept: application/json'
{
  "success": true,
  "found": true,
  "macPrefix": "A4EF0C",
  "company": "Mellanox Technologies, Inc.",
  "address": "350 Oakmead Parkway, Suite 100, Sunnyvale CA 94085, US",
  "country": "US",
  "blockStart": "A4EF0C000000",
  "blockEnd": "A4EF0CFFFFFF",
  "blockSize": 16777215,
  "blockType": "MA-L",
  "updated": "2026-09-03",
  "isRand": false,
  "isPrivate": false
}