AS63899: the CHUAN-CHAN-NET-A National Taiwan University of Science and Technology network

AS63899 is an internet Autonomous System operated by CHUAN-CHAN-NET-A National Taiwan University of Science and Technology (Taiwan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS63899?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS63899 was assigned to CHUAN-CHAN-NET-A National Taiwan University of Science and Technology by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS63899 currently announces 1 IPv4 block(s), totaling 512 addresses (512 in all), registered in Taiwan. Services from CHUAN-CHAN-NET-A National Taiwan University of Science and Technology are reached through these addresses.

What it means to see AS63899 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS63899. That means the other end sits on the CHUAN-CHAN-NET-A National Taiwan University of Science and Technology 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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