Autonomous System Number

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In the context of IP address information, **ASN** stands for **Autonomous System Number**. 

### What is an ASN?

- It is a unique identifier assigned to an **Autonomous System (AS)**, which is a large network or group of networks under a single organization's administrative control. 

- An AS is used for routing traffic on the internet, and the ASN helps identify the organization or entity managing that network.

### Common Uses in IP Information:

1. **Organization Identification**: ASNs are often linked to internet service providers (ISPs), data centers, or large corporations.

2. **Routing Details**: It helps determine how data is routed between your device and other systems on the internet.

3. **Geolocation and Ownership**: Tools that analyze IP addresses use ASNs to provide details about the entity managing the IP range.

For example, if your IP address is part of an ASN belonging to an ISP, the ASN data might show the name of the ISP and its associated routing details.

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資訊來源：

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Placeholder 湯偉晉編寫的英文字典

Placeholder 湯偉晉編寫的英文字典