MAC Address Lookup

AltoBeam Inc. A4:EF:15

A4:EF:15 is a 24-bit MA-L MAC address block registered to AltoBeam Inc. in CN.

Vendor

AltoBeam Inc.

MA-L · 24-bit
A4:EF:15

Unicast · Universally administered (U/L bit clear)

Matched prefix
A4:EF:15
Match
MA-L assignment
Address range
A4:EF:15:00:00:00 – A4:EF:15: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
Sep 22, 2021

Formats

  • Plain hex A4EF15
  • Colon-separated A4:EF:15
  • Hyphen-separated A4-EF-15
  • Cisco dot notation A4EF.15

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. Sep 22, 2021
  2. AltoBeam Inc. Jun 16, 2026