AS18047: the NTHU-TW National Tsing-Hua University network

AS18047 is an internet Autonomous System operated by NTHU-TW National Tsing-Hua University (Taiwan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS18047?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS18047 was assigned to NTHU-TW National Tsing-Hua University by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS18047 currently announces 2 IPv4 block(s), totaling about 73.7 thousand addresses (73,728 in all), registered in Taiwan. Services from NTHU-TW National Tsing-Hua University are reached through these addresses.

What it means to see AS18047 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS18047. That means the other end sits on the NTHU-TW National Tsing-Hua University 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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