AS131660: the CHTCDN Data Communication Business Group network

AS131660 is an internet Autonomous System operated by CHTCDN Data Communication Business Group (Taiwan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS131660?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS131660 was assigned to CHTCDN Data Communication Business Group by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS131660 currently announces 2 IPv4 block(s), totaling about 1.3 thousand addresses (1,280 in all), registered in Taiwan. Services from CHTCDN Data Communication Business Group are reached through these addresses.

What it means to see AS131660 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS131660. That means the other end sits on the CHTCDN Data Communication Business Group network (Taiwan). It can be legitimate — a cloud service, an ISP, a CDN — or an unexpected connection worth checking.

How to see every connection and network your devices reach

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