MAC Address Lookup
Find the vendor name of a device by entering an OUI or a MAC address
MAC address B4:DF:43:3 (Hangzhou Huasu Technology CO., LTD.)
MAC address prefix B4:DF:43:3 is registered to Hangzhou Huasu Technology CO., LTD., located at 2nd & 3rd Floor of No.3 Building, No.1418-50 Moganshan Road, Hangzhou, China, Hangzhou 310000, CN. This registration is classified as MA-M (MAC Address Block Medium) containing 1,048,576 MAC addresses (2^20). The prefix was registered on 29 July 2026, and no subsequent updates have been recorded.
Vendor & Registry Dossier
Assigned Prefix
B4:DF:43:3
Registrant / Organization
Registry Chronology
Initial registration: 29 July 2026
Assignment Classification
MA-M
(MAC Address Block Medium) containing 1,048,576 MAC addresses (2^20)
Registered Location
Country: China (CN)
Headquarters Registered Facility 🇨🇳 CN
2nd & 3rd Floor of No.3 Building
No.1418-50 Moganshan Road
Hangzhou
China
Hangzhou 310000
CN.
No.1418-50 Moganshan Road
Hangzhou
China
Hangzhou 310000
CN.
REST API v2
200 OK
CLI
curl -s https://api.maclookup.app/v2/macs/b4df433 -H 'Accept: application/json'{
"success": true,
"found": true,
"macPrefix": "B4DF433",
"company": "Hangzhou Huasu Technology CO., LTD.",
"address": "2nd & 3rd Floor of No.3 Building, No.1418-50 Moganshan Road, Hangzhou, China, Hangzhou 310000, CN",
"country": "CN",
"blockStart": "B4DF43300000",
"blockEnd": "B4DF433FFFFF",
"blockSize": 1048575,
"blockType": "MA-M",
"updated": "2026-07-29",
"isRand": false,
"isPrivate": false
}