MAC address B4:EF:30 (Shanghai SYH Technology CO.,LTD)

MAC address prefix B4:EF:30 is registered to Shanghai SYH Technology CO.,LTD, located at Building 4, No. 686 Nanfeng Road, Fengcheng Town, Fengxian District, Shanghai 201400, CN. This registration is classified as MA-L (MAC Address Block Large) containing 16,777,216 MAC addresses (2^24). The prefix was registered on 28 April 2025, and no subsequent updates have been recorded.

Vendor & Registry Dossier

Public Allocation
Assigned Prefix
B4:EF:30
Registrant / Organization
Shanghai SYH Technology CO.,LTD
Registry Chronology
Initial registration: 28 April 2025
Assignment Classification
MA-L

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

Registered Location

MAC Address Vendor Country China (CN) map
Country: China (CN)
Headquarters Registered Facility 🇨🇳 CN
Building 4
No. 686 Nanfeng Road
Fengcheng Town
Fengxian District
Shanghai 201400
CN.

REST API v2

200 OK
CLI curl -s https://api.maclookup.app/v2/macs/b4ef30 -H 'Accept: application/json'
{
  "success": true,
  "found": true,
  "macPrefix": "B4EF30",
  "company": "Shanghai SYH Technology CO.,LTD",
  "address": "Building 4, No. 686 Nanfeng Road, Fengcheng Town, Fengxian District, Shanghai  201400, CN",
  "country": "CN",
  "blockStart": "B4EF30000000",
  "blockEnd": "B4EF30FFFFFF",
  "blockSize": 16777215,
  "blockType": "MA-L",
  "updated": "2025-04-28",
  "isRand": false,
  "isPrivate": false
}