MAC address A4:25:1B: manufacturer Avaya Inc
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Testar grátis 14 dias →The MAC address A4:25:1B (or A4251B, without separators) identifies a device made by Avaya Inc. Here is what that means and how to recognize devices on your network.
Who owns the MAC starting with A4:25:1B?
The first three blocks of a MAC address form the OUI (Organizationally Unique Identifier), a code the IEEE assigns to each manufacturer. The prefix A4:25:1B is registered to Avaya Inc. Any device whose MAC starts with A4:25:1B (for example, A4:25:1B: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 Avaya Inc MAC you don't recognize could be a legitimate device (a phone, a TV, a camera) — or one that shouldn't be there. Avaya Inc has 52 MAC prefixes registered with the IEEE (see others under "Read also").
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 A4:25:1B?
The prefix A4:25:1B (A4251B) is registered with the IEEE to Avaya Inc.
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 A4:25:1B MAC from Avaya Inc?
Yes. Any MAC starting with A4:25:1B was assigned to Avaya Inc by the IEEE, though the final product may be sold under another brand.