MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
MAC address D4:00:CA (AUMOVIO Systems Romania S.R.L.)
MAC address prefix D4:00:CA is registered to AUMOVIO Systems Romania S.R.L., located at Str. Salzburg Nr. 8, 550018, Sibiu Sibiu 550018, RO. This registration is classified as MA-L (MAC Address Block Large) containing 16,777,216 MAC addresses (2^24). The prefix was initially registered on 10 February 2025, with the most recent update made on 12 December 2025.
Vendor & Registry Dossier
Assigned Prefix
D4:00:CA
Registrant / Organization
Registry Chronology
Initial registration: 10 February 2025
Last updated: 12 December 2025
Assignment Classification
MA-L
(MAC Address Block Large) containing 16,777,216 MAC addresses (2^24)
Registered Location
Country: Romania (RO)
Headquarters Registered Facility 🇷🇴 RO
Str. Salzburg Nr. 8
550018
Sibiu Sibiu 550018
RO.
550018
Sibiu Sibiu 550018
RO.
REST API v2
200 OK
CLI
curl -s https://api.maclookup.app/v2/macs/d400ca -H 'Accept: application/json'{
"success": true,
"found": true,
"macPrefix": "D400CA",
"company": "AUMOVIO Systems Romania S.R.L.",
"address": "Str. Salzburg Nr. 8, 550018, Sibiu Sibiu 550018, RO",
"country": "RO",
"blockStart": "D400CA000000",
"blockEnd": "D400CAFFFFFF",
"blockSize": 16777215,
"blockType": "MA-L",
"updated": "2025-12-12",
"isRand": false,
"isPrivate": false
}