MAC address vendor

Action Technology (SZ) Co., Ltd: Confirmed MA-L Registrant; Device/Product Unknown

Primary prefix
00:1B:03
Block
MA-L

Summary

// what this is
Action Technology is registered to MAC prefix 00:1B:03 in the IEEE OUI database. When a device's MAC address begins with 00:1B:03, that block was registered by Action Technology — the OUI identifies the maker of the network hardware, which is not always the brand on the device.
[ 01 ] — Context

About this vendor.

Updated  ·  Confidence: High  ·  2 sources  ·  How this page is checked

A MAC address beginning 00:1B:03 is registered to Action Technology (SZ) Co., Ltd; the available evidence does not identify a device category or product using this prefix. The IEEE record lists one MA-L assignment, 00:1B:03, and gives an address in Shenzhen, Guangdong, China. This supports a country-level identification of China, but does not establish where the prefix is deployed or who currently operates any matching device.

The prefix is 24 bits long, leaving 24 bits for suffix values: 16,777,216 possible values within the block. This is a mathematical address-space count, not a count of devices, shipments, or observed traffic. RFC 7042 describes MAC identifiers as an assigned initial prefix followed by additional bits, and defines the Group and Local bits in the first octet.

For 00:1B:03, the Group bit and Local bit are both zero. An exact match fixes these first-octet bits; changing either bit produces a different prefix and does not indicate variation within this fixed assignment. A prefix match establishes only that the address begins with the registered prefix; it cannot identify a particular device, product, operating system, or security state.

Device or product identification
Unknown; no supplied evidence maps a device category or product to this prefix [Unknown] — https://standards-oui.ieee.org/oui/oui.csv
Assignment
00:1B:03 (MA-L), one prefix [Confirmed] — https://standards-oui.ieee.org/oui/oui.csv
[ 02 ] — OUI prefixes

Assignments by IEEE.

1
// registered prefixes1
  1. 00:1B:03MA-L
[ 03 ] — Related

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