MAC address C4:B1:6B (Advantech Czech)

MAC address prefix C4:B1:6B is registered to Advantech Czech, located at Sokolska 71, Usti nad Orlici 56204, CZ. This registration is classified as MA-L (MAC Address Block Large) containing 16,777,216 MAC addresses (2^24). The prefix was registered on 16 December 2025, and no subsequent updates have been recorded.

Vendor & Registry Dossier

Public Allocation

Assigned Prefix

C4:B1:6B

Registrant / Organization

Advantech Czech

Registry Chronology

Initial registration: 16 December 2025

Assignment Classification

MA-L

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

Registered Location

Country: Czechia (CZ)

Headquarters Registered Facility 🇨🇿 CZ

Sokolska 71
Usti nad Orlici 56204
CZ.

REST API v2

200 OK

CLI curl -s https://api.maclookup.app/v2/macs/c4b16b -H 'Accept: application/json'

{
  "success": true,
  "found": true,
  "macPrefix": "C4B16B",
  "company": "Advantech Czech",
  "address": "Sokolska 71, Usti nad Orlici  56204, CZ",
  "country": "CZ",
  "blockStart": "C4B16B000000",
  "blockEnd": "C4B16BFFFFFF",
  "blockSize": 16777215,
  "blockType": "MA-L",
  "updated": "2025-12-16",
  "isRand": false,
  "isPrivate": false
}