MAC address B4:FB:E3 (AltoBeam Inc.)

MAC address prefix B4:FB:E3 is registered to AltoBeam Inc., located at B808, Tsinghua Tongfang Hi-Tech Plaza, Haidian, Beijing Beijing 100083, CN. 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 25 July 2020, with the most recent update made on 15 June 2026.

Vendor & Registry Dossier

Public Allocation
Assigned Prefix
B4:FB:E3
Registrant / Organization
AltoBeam Inc.
Registry Chronology
Initial registration: 25 July 2020
Last updated: 15 June 2026
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
B808
Tsinghua Tongfang Hi-Tech Plaza
Haidian
Beijing Beijing 100083
CN.

REST API v2

200 OK
CLI curl -s https://api.maclookup.app/v2/macs/b4fbe3 -H 'Accept: application/json'
{
  "success": true,
  "found": true,
  "macPrefix": "B4FBE3",
  "company": "AltoBeam Inc.",
  "address": "B808, Tsinghua Tongfang Hi-Tech Plaza, Haidian, Beijing Beijing 100083, CN",
  "country": "CN",
  "blockStart": "B4FBE3000000",
  "blockEnd": "B4FBE3FFFFFF",
  "blockSize": 16777215,
  "blockType": "MA-L",
  "updated": "2026-06-15",
  "isRand": false,
  "isPrivate": false
}