MAC address 04:F0:21: manufacturer Compex Systems Pte Ltd
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Testar grátis 14 dias →The MAC address 04:F0:21 (or 04F021, without separators) identifies a device made by Compex Systems Pte Ltd. Here is what that means and how to recognize devices on your network.
Who owns the MAC starting with 04:F0:21?
The first three blocks of a MAC address form the OUI (Organizationally Unique Identifier), a code the IEEE assigns to each manufacturer. The prefix 04:F0:21 is registered to Compex Systems Pte Ltd. Any device whose MAC starts with 04:F0:21 (for example, 04:F0:21:1A:2B:3C) was made by this company.
What it means to see this device on your network
Knowing the manufacturer helps identify what is connected to your Wi-Fi or company network. A Compex Systems Pte Ltd MAC you don't recognize could be a legitimate device (a phone, a TV, a camera) — or one that shouldn't be there.
How to see every device and vendor on your network
Looking up one MAC vendor at a time is tedious. Sentinela, by PC Monitor, automatically maps every device on your network, shows each one's vendor by MAC and flags suspicious devices and connections — running on your Windows. Meet Sentinela.
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Perguntas frequentes
Who owns MAC address 04:F0:21?
The prefix 04:F0:21 (04F021) is registered with the IEEE to Compex Systems Pte Ltd.
What is the OUI of a MAC address?
It is the first three blocks of the MAC (6 hex digits), which the IEEE assigns to each manufacturer.
Is every 04:F0:21 MAC from Compex Systems Pte Ltd?
Yes. Any MAC starting with 04:F0:21 was assigned to Compex Systems Pte Ltd by the IEEE, though the final product may be sold under another brand.