AS38854: the ZENLAYER-AS-TW Zenlayer network

AS38854 is an internet Autonomous System operated by ZENLAYER-AS-TW Zenlayer (Taiwan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS38854?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS38854 was assigned to ZENLAYER-AS-TW Zenlayer by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS38854 currently announces 11 IPv4 block(s), totaling about 3.8 thousand addresses (3,840 in all), registered in Taiwan. Services from ZENLAYER-AS-TW Zenlayer are reached through these addresses.

What it means to see AS38854 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS38854. That means the other end sits on the ZENLAYER-AS-TW Zenlayer 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

Tracing one connection's ASN at a time is tedious. Sentinela, by PC Monitor, maps the devices on your network, shows what is exposed to the internet and helps flag suspicious connections and devices — running on your Windows. Meet Sentinela.