MAC Address Lookup

AltoBeam Inc. B4:FB:E3

B4:FB:E3 is a 24-bit MA-L MAC address block registered to AltoBeam Inc. in CN.

Vendor

AltoBeam Inc.

MA-L · 24-bit
B4:FB:E3

Unicast · Universally administered (U/L bit clear)

Matched prefix
B4:FB:E3
Match
MA-L assignment
Address range
B4:FB:E3:00:00:00 – B4:FB:E3:FF:FF:FF
Addresses in block
16,777,216
Country
CN
Organization address
B808, Tsinghua Tongfang Hi-Tech Plaza, Haidian Beijing Beijing CN 100083
First registered
Jul 26, 2020

Formats

  • Plain hex B4FBE3
  • Colon-separated B4:FB:E3
  • Hyphen-separated B4-FB-E3
  • Cisco dot notation B4FB.E3

Prefix lineage

This prefix has changed hands. Dates are when each change was first observed in public registration data (runZero mac-tracker).

  1. AltoBeam (China) Inc. Jul 26, 2020
  2. AltoBeam Inc. Jun 16, 2026