MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
MAC address B4:56:F3 (Westermo Network Technologies AB)
MAC address prefix B4:56:F3 is registered to Westermo Network Technologies AB, located at Metallverksgatan 6, Vasteras 721 30, SE. This registration is classified as MA-L (MAC Address Block Large) containing 16,777,216 MAC addresses (2^24). The prefix was registered on 26 September 2026, and no subsequent updates have been recorded.
Vendor & Registry Dossier
Assigned Prefix
B4:56:F3
Registrant / Organization
Registry Chronology
Initial registration: 26 September 2026
Assignment Classification
MA-L
(MAC Address Block Large) containing 16,777,216 MAC addresses (2^24)
Registered Location
Country: Sweden (SE)
Headquarters Registered Facility 🇸🇪 SE
Metallverksgatan 6
Vasteras 721 30
SE.
Vasteras 721 30
SE.
REST API v2
200 OK
CLI
curl -s https://api.maclookup.app/v2/macs/b456f3 -H 'Accept: application/json'{
"success": true,
"found": true,
"macPrefix": "B456F3",
"company": "Westermo Network Technologies AB",
"address": "Metallverksgatan 6, Vasteras 721 30, SE",
"country": "SE",
"blockStart": "B456F3000000",
"blockEnd": "B456F3FFFFFF",
"blockSize": 16777215,
"blockType": "MA-L",
"updated": "2026-09-26",
"isRand": false,
"isPrivate": false
}